4/11/17

 

8900.1 CHG 525

VOLUME 6  SURVEILLANCE

CHAPTER 11  OTHER SURVEILLANCE

Section 24  Safety Assurance System: Evaluate/Inspect Parts 121 and 129 Operators’ Electrical Wiring Interconnection Systems Maintenance Program

6-2723    REPORTING SYSTEM(S).

A.    Program Tracking and Reporting Subsystem (PTRS) Activity Codes. The Federal Aviation Administration (FAA) has developed the following PTRS activity codes for Title 14 of the Code of Federal Regulations (14 CFR) part 129, § 129.14 in order to track and document the initial incorporation, revisions, and ongoing surveillance activities of the FAA Oversight Office-approved type certificate (TC) and Supplemental Type Certificate (STC) electrical wiring interconnection systems (EWIS) instructions for continued airworthiness (ICA) into an operator’s maintenance program: 3316, 4319, 4320, 5316, 6319, and 6320.

NOTE:  In this section, the terms “operator,” “it,” and “its” refer to any certificate holder, air carrier, or other entity operating under 14 CFR part 121 and § 129.14.

Indicates new/changed information.

B.    Safety Assurance System (SAS) for Part 121 Air Carriers. Use SAS automation and the associated Data Collection Tools (DCT). This section is related to SAS Element 4.6.2 (AW), Maintenance Special Emphasis Programs.

Indicates new/changed information.

6-2724    COORDINATION REQUIREMENTS. This task requires coordination between the principal inspectors (PI) and aviation safety inspectors (ASI). It may also include coordination with the Aircraft Certification Office (ACO) for initial/revision approval of EWIS ICAs. Additional coordination may be necessary between the PI of 14 CFR part 145 certificated repair stations (CRS) and the certificate management office (CMO) of an operator with which the operator has a maintenance agreement.

6-2725    OBJECTIVE. This section provides specific guidance to principal maintenance inspectors (PMI)/principal avionics inspectors (PAI) for determining an operator’s compliance with the Enhanced Airworthiness Program for Airplane Systems (EAPAS)/fuel tank safety (FTS) operation rules. (The PMI and PAI are referred to as the PI in this section.)

Indicates new/changed information.

NOTE:  This section only addresses the EAPAS requirements in the EAPAS/FTS rule. Volume 6, Chapter 11, Section 23, and § 129.14 address the FTS requirements. Advisory Circular (AC) 120‑97, Incorporation of Fuel Tank System Instructions for Continued Airworthiness into Operator Maintenance and/or Inspection Programs, is available on the FAA website at http://www.faa.gov/regulations_policies/advisory_circulars/.

6-2726    GENERAL. On November 8, 2007, the FAA published the EAPAS/FTS final rule. The purpose of the rule is to help ensure the continued safety of transport category airplanes by improving the design, installation, and maintenance of an EWIS. The rule includes a new part 121 subpart AA and part 129 subpart B. The rule also includes §§ 121.1111 and 129.111 to implement an EWIS, and §§ 121.1113 and 129.113 to implement FTS actions developed in accordance with Special Federal Aviation Regulations (SFAR) 88. The rule includes new 14 CFR part 26, § 26.11 and part 25, §§ 25.1701 through 25.1733.

NOTE:  For the purposes of this section, the FAA Oversight Office is defined in § 26.3 as the ACO or the office of the Transport Airplane Directorate with oversight responsibility for the relevant TC, STC, or manufacturer as determined by the Administrator.

NOTE:  Section 25.1701 states, “…electrical wiring interconnection system (EWIS) means any wire, wiring device, or combination of these, including termination devices, installed in any area of the airplane for the purpose of transmitting electrical energy, including data and signals, between two or more intended termination points.”

6-2727    APPLICABILITY.

A.    Affected Aircraft. The EAPAS/FTS rule applies to operators of transport category turbine-powered airplanes with a TC issued after January 1, 1958 that, as a result of original type certification or later increase in capacity, have a maximum TC’d passenger capacity of 30 or more or a maximum payload capacity of 7,500 pounds or more. The rule also applies to any transport category airplane that has § 25.1729 in its certification basis.

B.    “Original Type Certification or Later Increase in Capacity.” This phrase addresses two situations. In the past, some design approval holders (DAH) which include TC holders, STC holders, and amended type certificate holders (TCH) and operators, avoided applying requirements mandated only for airplanes over a specific capacity by receiving a design change approval for a slightly lower capacity. By referencing the capacity resulting from original certification, the rule removes this means of avoiding compliance. Also, the FAA could have originally certificated an airplane design with a capacity slightly lower than the minimum specified in the rule, but through later design changes, the capacity could be increased above this minimum. The reference to later increase in capacity in the rule ensures that, if this occurs, the design would have to meet the requirements of the rule.

6-2728    EWIS ICA REQUIRED BY § 26.11.

A.    Inspection or Restoration Tasks. The EWIS ICAs required by § 26.11 are inspection and restoration tasks, procedures, and instructions to keep an EWIS Airworthy throughout its operational life and are described in the subparagraphs below. The EWIS ICAs required by § 26.11 are developed in accordance with part 25 appendix H, § H25.5(a)(1) and (b), and include:

1)    Inspections can be a zonal General Visual Inspection (GVI), standalone GVI, Detailed Inspection (DET), or a combination of these as required for a design change.
2)    Restoration tasks are usually cleaning tasks, such as replacing an air filter in order to reduce the likelihood of contamination build-up within a zone.

NOTE:  The TCH or applicant develops the inspection and restoration tasks using the Airlines for America (A4A) Maintenance Steering Group - 3rd Task Force (MSG-3) and later revisions and the enhanced zonal analysis procedure (EZAP) described in AC 25-27, Development of Transport Category Airplane Electrical Wiring Interconnection Systems Instructions for Continued Airworthiness Using and Enhanced Zonal Analysis Procedure. An STC holder or applicant does not utilize the Maintenance Review Board (MRB) process, but uses the guidance contained in AC 25-27 to develop any new or revised EWIS ICAs as required for a design change.

3)    In addition to the inspection and restoration tasks, EWIS ICAs can also include:
a)    A revised standard wiring practices/electrical standards manual that is presented in a standardized format using the guidance in AC 25-27 (refer to § H25.5(a)(4)).
b)    Wire separation requirements (refer to § H25.5(a)(3)).
c)    Information explaining the EWIS identification method and requirements for identifying any changes to the EWIS (refer to § H25.5(a)(4)).
d)    Electrical load data (i.e., electrical load analysis) and instructions for updating that data (refer to § H25.5(a)(5)).
e)    The source document requirements only apply to EWIS inspection and restoration tasks.
f)    The DAH or applicant develops the EWIS ICA using the MSG-3 and AC 25-27. An STC holder or applicant does not utilize the MSG-3, but can use guidance contained in AC 25-27 to develop any new or revise EWIS ICAs as required for a design change.

B.    Multiple Components. EWIS ICAs can be, and almost always are, comprised of several different components. All of these components together define a particular EWIS ICA. The components of EWIS ICAs are located in multiple DAH-produced documents.

1)    For example, EWIS ICA components can be located in one or more of the following:

    Document required by § H25.5(b), commonly referred to as “source document;”

    Maintenance Review Board Report (MRBR);

    Maintenance Planning Document (MPD);

    Maintenance Implementation Document (MID);

    Aircraft Maintenance Manual (AMM);

    Standard wiring practice manual (SWPM);

    Electrical Standard Practices Manual (ESPM) (a term used by some DAHs); or

    Standalone ICA document produced by an STC applicant.

2)    EWIS ICA components are items such as:
a)    Type of task (restoration/cleaning, standalone GVI, DET, or standard zonal as identified in the MRBR or MID).
b)    Task interval (e.g., every 16,000 flight cycles or 3,000 days).
c)    Airplane zone identification for airplanes with a zonal program (e.g., Zone 201). Task description as described in the MRBR and MID (e.g., “Inspect (General Visual) all exposed EWIS in the wheel well”).

NOTE:  The gear is extended with the handle down and the gear locked in the down position and doors in the open position.

d)    Airplane applicability as identified in the source document. Some models within the same family of airplanes may have differing maintenance requirements based on available options (e.g., freighter versus passenger version and engine types). Task procedure(s) are described in the referenced AMM or other documents that contain the procedure(s). These are the actual instructions on how to perform the GVI, DET, and restoration/cleaning tasks that support the task descriptions listed in the MRBR and MID.
e)    Supporting task procedure(s) if any, necessary to perform the task procedure in any other document referenced by the task procedure.
f)    Instructions for protections and caution information that will minimize contamination and accidental damage to the EWIS. These can appear in different places, such as in the AMM or in the SWPM/ESPM. This information, if contained in the SWPM/ESPM (or other similar documents), should be in its chapter 20. Sometimes this information is repeated in the standard practices chapter 20 of the AMM. In any case, it is general protections and caution information, and it is not expected that unique procedures will be developed for individual EWIS ICA for a particular airplane model or even models produced by the same manufacturer. The AMM or SWPM/ESPM will reference any protection and caution information specific to EWIS ICA.

C.    EWIS Source Document. Section H25.5(b) states that the EWIS ICA developed in accordance with the requirements of § H25.5(a)(1) must be in the form of a document appropriate for the information to be provided and must be easily recognizable as an EWIS ICA. This document must either contain the required EWIS ICA or specifically reference other sections of the EWIS ICA that contain this information. This document is referred to as the source document. Section H25.5(b) does not prescribe a specific data form. The form is at the discretion of the DAH, as long as it meets the requirements of § H25.5(b). The entire EWIS ICA can be in the source document, or the source document can point to a series of other documents, such as the MRBR, MPD, MID, AMM, or SWPM/ESPM, which contain the EWIS ICA.

1)    The FAA Oversight Office has approved the airplane model specific source documents. Operators will use the source document to identify and locate the EWIS ICAs and incorporate them in their maintenance program.
2)    The DAH will revise the source document as new or revised EWIS ICAs are developed. They will then provide the revised source document to operators after the document has been approved by the FAA Oversight Office.

D.    PI Action.

1)    PIs must review and familiarize himself or herself with the source document and any maintenance documents identified in the source document that pertain to the specific airplane model(s) in the operator’s fleet.
2)    The PI must ensure that the operator has properly identified and accounted for all of the components of each EWIS ICA identified in the source document and ensure that all components are included in the operator’s maintenance program/manuals job/task cards and Engineering Order (EO)/authorizations where appropriate.
Indicates new/changed information.
3)    The PI will review and approve the incorporation of the EWIS ICAs into the operator’s maintenance program. When the review is complete, the PI will issue or amend Operations Specification (OpSpec)/Management Specification (MSpec) D097, Aging Aircraft Programs. The operator must have procedures in its maintenance program/manual to notify the PI when EWIS ICAs are revised by the DAH or the operator.
4)    Sections 121.1111(e) and 129.111(e) require that any EWIS maintenance program changes identified in subparagraphs (c) and (d) of those sections and any later revisions be submitted to the responsible PI for review and approval.

E.    Controlling Reference Numbers. Controlling reference numbers for the individual EWIS ICA tasks are listed in the MRBR, MPD, MID, or other maintenance documents. An example of a controlling reference number in an MRBR is “MM/MPD ref. 20-XXX-XX.” This number corresponds to a cross-reference number in the source document and the AMM, which is the actual maintenance task with all associated instructions to accomplish it. The DAH may refer to these reference numbers as MRBR, AMM/MPD reference, Maintenance Significant Item (MSI) reference, task number, etc. The DAH will identify all reference numbers necessary to fully identify and track the EWIS ICAs. All reference numbers considered necessary to fully identify and track the EWIS ICAs should be considered part of the EWIS ICAs.

F.    DAH Revisions to EWIS ICAs. The DAH will revise the source document in order to account for any new or revised EWIS inspection or restoration procedures developed due to production changes or design changes mandated by Airworthiness Directives (AD). They will provide the revised source document to operators after the document has been approved by the FAA Oversight Office.

G.    EWIS ICAs Required by § 25.1729. In addition to EWIS ICAs that are required and developed under § 26.11 for existing in-service airplanes, there will also be EWIS ICAs developed under § 25.1729 for new airplane TCs or when 14 CFR part 21, § 21.101 requires the holder of an amended TC or an STC to comply with a corresponding amendment to part 25 that was issued on or after the date of the applicable part 26 provision. Section 21.101 is referred to as the “Changed Product Rule.” The EWIS ICAs required by § 25.1729 are developed under § H25.5(a)(1-5). Simply stated, an operator can have airplanes that have EWIS ICAs developed under § 26.11 and EWIS ICAs developed under § 25.1729, which includes all of § H25.5.

H.    EWIS ICAs Required by § 26.11. The DAH (TC and STC) is required to develop ICAs for the “representative airplane’s” EWIS (refer to Appendix 2 of AC 120-102, Incorporation of Electrical Wiring Interconnection Systems Instructions for Continued Airworthiness into an Operator’s Maintenance Program) according to § 26.11, as follows:

1)    TCH-Developed EWIS Inspection and Restoration Tasks. The TCH develops EWIS ICAs in accordance with § H25.5(a)(1) and (b) which are invoked either by § 25.1729 or § 26.11(b) or (c) utilizing the MSG-3 logic contained in the A4A Operator/Manufacturer Scheduled Maintenance Development Document (MSG-3), Revision 2005.1 and later revisions, and AC 25-27. The EWIS ICAs will be identified as EWIS ICAs, as required by § H25.5(b), in the source document developed by the TCH. As stated in the discussion earlier in this section, the TCH will:
a)    Develop a source document that contains all required EWIS ICA data;
b)    Develop a source document that references other maintenance documentation that contains the required EWIS ICA data; or
c)    Utilize an existing document, such as the MRBR, MPD, or MID.

NOTE:  TCHs with § 25.1729 in their certification basis will develop EWIS ICAs in accordance with § H25.5(a) and (b).

2)    STC/Amended TC Holders. STC/amended TC holders are only required to develop EWIS ICAs in compliance with § 26.11(c), or if required or elected, in compliance with § 25.1729. If the application date for the STC, or any change to existing STCs was before December 10, 2007, and the FAA issued the certificate on or after December 10, 2007. New STC or amended applications filed after the effective date of the rule (December 10, 2007) are also required to develop FAA Oversight Office-approved EWIS ICAs in compliance with § 26.11, or, if required or elected, in compliance with § 25.1729.

NOTE:  STC/amended TC holders with § 25.1729 in their certification basis will develop EWIS ICAs in accordance with § H25.5(a) and (b).

6-2729    WHY EWIS ICA APPROVAL IS NECESSARY. The FAA has determined that EWIS ICAs must be approved by the cognizant FAA Oversight Office. The development of EWIS maintenance and inspection requirements can be complex, requiring qualitative engineering and maintenance assumptions. Approval will help ensure standardized application of these assumptions (e.g., zone density, zone size, potential effects of fire, and environmental effects). FAA approval also ensures that operators can use the data/documents to comply with the operational requirements in the EAPAS/FTS rule, and that the data delivered to the operators will be standardized.

Indicates new/changed information.

6-2730    OPERATOR INCORPORATION OF EWIS ICAs INTO THE MAINTENANCE PROGRAM. Sections 121.1111 and 129.111 require the PI to review and approve EWIS ICA maintenance program changes. When the review is complete, the PI will issue or amend OpSpec/MSpec D097.

A.    PI Action for Inspection and Restoration Tasks/Intervals.

1)    PIs must ensure that the operator incorporates the FAA Oversight Office-approved EWIS inspection and restoration tasks and task intervals into its maintenance program/manual. This includes the operator’s job/task cards, and any other documents the operator may use in administering its maintenance program, such as EO/authorizations, as applicable.
2)    PIs must ensure that the operator has procedures in its manual to notify the PI of any revisions to the DAH inspection and restoration tasks and intervals.
Indicates new/changed information.

B.    Instructions and Procedures. The FAA Oversight Office-approved ICA instructions/procedures to perform the EWIS tasks will be contained in the source document, or the source document will point to other manuals that contain the instructions and procedures such as the AMM/SWPM/ESPM. Operators must incorporate these instructions/procedures into their maintenance program/manuals and job/task cards. It is especially important that the job/task cards contain all the instructions and procedures that support the EWIS tasks.

Indicates new/changed information.

NOTE:  The operator can develop its own instructions and procedures to carry out the EWIS tasks provided that those developed by the operator produce an equivalent result to those approved by the FAA Oversight Office, and the AMM/SWPM/ESPM allows the use of alternative or equivalent tools or materials; in this case, further approval by the FAA Oversight Office is not required. If the operator proposes to change the instructions and procedures, the PI must find the supporting technical justification/data acceptable upon submittal.

C.    PI Action for Instructions and Procedures. PIs must ensure that the operator incorporates the FAA Oversight Office-approved ICA instructions and procedures to perform the EWIS task into its maintenance program/manual, and job/task cards and any other documents the operator may use to administer its maintenance program, such as EO/authorizations, as applicable.

D.    Protections and Caution Instructions/Information. The EWIS ICAs also include protections and caution instructions/information that will minimize contamination and accidental damage to the EWIS during the performance of maintenance, alterations, or repairs. The TCH has developed these protections and caution instructions/information to support the EWIS maintenance program for the airplane. STC holders may develop their own protections and caution instructions/information, or they may choose to use that of the TCH.

NOTE:  These protections and caution instructions/information will be in the source document, AMM, or SWPM/ESPM. They are FAA Oversight Office-approved. It is important that the operator apply these protections and cautions to minimize contamination and accidental damage to EWIS when performing maintenance, alteration, or repairs. It is also important to clean the EWIS and surrounding area after completion. These protections and caution instructions/information must be incorporated into the operator’s maintenance program/manual.

E.    PI Action Protections and Caution Instructions/Information. The PI must ensure that the operator incorporates the FAA Oversight Office-approved protections and caution instructions/information into its maintenance program/manual and job/task cards, and any other documents the operator may use to administer its maintenance program, such as EO/authorizations, as applicable. In addition, the operator must have procedures in its maintenance program/manual that instruct its maintenance personnel “to clean the EWIS and surrounding area after completion of any maintenance, alterations, or repairs.” It is especially important to include the same or a similarly worded statement on the job/task card.

1)    The operator must have procedures in its maintenance program/manual that instructs its maintenance program development personnel who write/revise manuals and job/task cards, and engineering personnel who develop/revise EOs, that all FAA Oversight Office-approved protections and caution instructions/information must be incorporated in those documents as appropriate. It is especially important to include the protections and caution instructions/information on the job/task cards.
2)    Operator-developed job/cards that include EWIS inspection and restoration tasks must have the protections and caution information and instructions included on the job/task card. Similarly, EOs that affect the EWIS must have protection and caution instructions/information included.

6-2731    STC/APPLICANTS/AMENDED STC HOLDER-DEVELOPED EWIS ICAs.

A.    Applicability. The part 26 requirement in the EAPAS/FTS rule applies to new STC applicants and STC or amended STC applications before December 10, 2007, and the certificate was issued on or after December 10, 2007. The rule also applies to new STC or amended STC applications filed after the effective date of the rule. It does not retroactively apply to any STCs installed prior to December 10, 2007.

B.    New/Amended STC Applications. Section 26.11 requires new or amended STC applications filed after the effective date of the rule to be evaluated and, if necessary, develop and submit the necessary revisions for review and approval to the FAA Oversight Office. If an operator develops its own STC, which creates new EWIS ICAs, the FAA Oversight Office must approve them.

C.    PI Action STC/Amended STC Holder-Developed EWIS ICAs.

1)    The operator must submit its STC/amended STC EWIS ICAs to the FAA Oversight Office for approval. This includes providing supporting technical justification/data.
2)    The PI must ensure that the operator has included any FAA Oversight Office-approved STC/amended STC EWIS ICA changes into its maintenance program.

6-2732    STC LIMITATION.

A.    Regulation. Part 26 did not prohibit issuing an STC even if the STC applicant had not yet met the requirements of that section. In this case, the FAA added a limitation to the STC. FAA engineering policy memo PS-AIR-100-2007-12-27B, Enhanced Airworthiness Program for Airplane Systems (EAPAS) Supplemental Type Certificate (STC) Limitation, dated July 7, 2008, describes how, why, and when the FAA did this. You can download an electronic copy at http://rgl.faa.gov.

B.    Limitation Statement. It is important that the PI understand that this is a limitation on the installation of the STC, not on the operation of airplanes on which the STC was installed previously. The following statement was added to the “Limitation” section of the STC:

“This modification may not be installed after August 30, 2010, unless (1) previously approved electrical wiring interconnection system (EWIS) instructions for continued airworthiness (ICA) have been evaluated and determined to be adequate for this installation by the FAA, or (2) revised EWIS ICA have been approved by the FAA Oversight Office. (Refer to § 26.11.)”

C.    Installation After August 30, 2010.

1)    In order for the operator to install the STC after August 30, 2010, the PI must ensure that the operator has one of the following:
a)    A letter from the FAA Oversight Office stating that the previously approved EWIS ICA have been evaluated and shown to be adequate for the modification. The operator must request this letter from the FAA Oversight Office to ensure that the STC has been evaluated in accordance with § 26.11(c)(1) and (2) prior to installation.
b)    A revised EWIS ICA that the FAA Oversight Office has approved for the STC modification. The revised EWIS ICA should be provided to the operator by the STC holder.
2)    In both cases the PI should verify that the EWIS ICA installed after August 30, 2010 are FAA Oversight Office approved.
Indicates new/changed information.

D.    Existing STCs After August 30, 2010. As stated in subparagraph 6-2732B, this is a limitation on installation, not operation. Operators can continue to operate their airplanes with the existing STCs after August 30, 2010. The operator has no obligation under the operation rules (§§ 121.1111 and 129.111) to develop EWIS ICAs for the existing STC. If the STC holder provides EWIS ICAs for the previously incorporated STC (STC installed after the effective date of the rule), the operator must incorporate the EWIS ICAs into its maintenance program.

6-2733    REQUIREMENT TO ENSURE COMPATIBILITY BETWEEN FTS AND EWIS ICAs.

A.    Purpose. The EAPAS/FTS rule requires the DAH to review any FTS ICAs developed to comply with SFAR 88, Fuel Tank System Fault Tolerance Evaluation Requirements. This ensures compatibility with the EZAP-generated EWIS ICAs and minimizes duplication of requirements between them (refer to AC 120-102 for more information on EZAP). Fuel tank wiring is part of the EWIS. The FTS maintenance and inspection requirements might be more specific than those for wiring in general, and might contain additional requirements.

B.    DAH Review. The DAH (TC/STC) will review the two ICAs to ensure that any maintenance tasks for EWIS do not compromise FTS wire requirements, such as separation or configuration specifications. The DAH will list these EWIS and FTS tasks and intervals in its maintenance program documents, such as the source document, MRBR, MID, and the MPD for the airplane. The DAH will identify them as EWIS ICAs or EWIS/SFAR 88 ICAs. The STC holder will list its ICA in the STC source document it provides.

C.    PI Action. The PI must ensure that the operator is fully aware of the criticality of wiring separation and configuration, especially for those that have AD requirements. The PI must ensure that the operator has procedures in its maintenance program/manual that address separation and configuration of EWIS, especially when performing a repair or alteration to the EWIS or FTS wiring. One way for the operator to accomplish this is to provide a cautionary statement on job/task cards and EO/authorizations about the criticality of wiring separation and configuration, and that it must be maintained. Further, the FAA Oversight Office must approve any operator changes to separation and configuration of EWIS or FTS wiring.

6-2734    CHANGES TO OPERATOR’S EWIS TASK OR INTERVALS.

A.    Types of Changes. There are two types of changes to the operator’s EWIS ICAs:

1)    Deletion of or changes to an EWIS task.
2)    Escalation of an airplane check package/interval, such as a “C check” containing EWIS tasks and intervals.

B.    FAA Oversight Office Approval. If the operator proposes to delete or change an EWIS task, it must be FAA Oversight Office approved.

C.    PI Action.

1)    If the operator proposes to delete or change an EWIS task, it must submit any proposed changes along with technical justification/data through the PI. The PI adds comments, if any, and forwards the proposed changes and data to the FAA Oversight Office for approval.
2)    The PI must review the operator’s submittal and ensure that the technical justification/data is fundamentally sound before providing comments for the FAA Oversight Office to review. For example:
a)    Is the proposed deletion because the task is already part of an existing task within the operator’s maintenance program, thereby being duplicative?
b)    Is the proposed change because the operator has a different or more efficient way of accomplishing the task? If so, the operator needs to explain in its proposal how the change is different or more efficient without compromising the intent of the original task or safety.

D.    Escalation of an Airplane Check/Package Interval. If the operator proposes an escalation of an airplane check/package interval such as the “C check” that contains EWIS ICA tasks and intervals, the FAA Oversight Office is not required to approve the change. This change is within the authority of the PI and the procedures in the operator’s manual.

6-2735    OPERATOR MAINTENANCE TRAINING PROGRAM. The EAPAS/FTS rule does not have a specific requirement for operator EWIS training. It is important that operators have an EWIS maintenance training program to ensure that each person (including inspection personnel) who determines the adequacy of work completed is fully informed about procedures, techniques, and new equipment in use, and is competent to perform their duties. AC 120-94, Aircraft Electrical Wiring Interconnection Systems Training Program, provides guidance to develop EWIS training.

A.    Operator Maintenance Training Programs under EAPAS/FTS Rule. The EAPAS/FTS rule introduced new requirements that affect DAH and operators. To fully realize the objectives of EAPAS/FTS requirements, the FAA encourages operators to reevaluate their current philosophical approach to maintaining, inspecting, and altering aircraft wiring and systems in the aircraft. The FAA has also adopted the “Protect and Clean as You Go” philosophy. This philosophy stresses:

1)    The importance of protective measures when working on or around the EWIS.
2)    The importance of protecting EWIS during structural repairs, STC installations, or other alterations by making sure that metal shavings, debris, and contamination resulting from such work are removed during work in progress and after completion.

B.    Application. The operator can apply this philosophy to aircraft wiring through the inclusion of protections and caution instructions/information in the maintenance program/manual and AC 25-27. This philosophical approach begins at the airplane manufacturer with maintenance program enhancements, maintenance manual changes, and maintenance training programs. In addition, there will be new maintenance manual and job card procedures, inspection devices, graphical information showing required tasks, or changes in tasks such as wiring splicing. Operators must provide training to maintenance, inspection, and engineering personnel, including persons who write and edit job/task cards. They should ensure that their contract maintenance providers are included. The FAA published AC 120-94 to assist operators in development of EWIS training programs.

C.    Fuel Tank System Wiring. Operator maintenance training programs must emphasize the EWIS as a system on the aircraft that includes fuel tank system wiring. In this case, the requirements for fuel tank system maintenance and inspection might be more specific than those for wiring in general, and might contain additional requirements that protect the fuel tank system ignition prevention features. The operator must maintain, inspect, and repair all EWIS in accordance with their manual, the AMM, the SWPM/ESPM, or other FAA-accepted methods, techniques, and practices.

6-2736    OPERATOR INCORPORATION OF FAA-APPROVED EWIS ICA INTO THE MAINTENANCE PROGRAM.

Indicates new/changed information.

A.    Operational Rules Requirement. The operational rules require part 121 and part 129 operators to incorporate FAA Oversight Office-approved EWIS ICAs (inspections and procedures), which include inspection tasks, task intervals, instructions/procedures to accomplish those tasks, and protection and caution instructions/information for the EWIS, into their maintenance program.

B.    PI Action for Inspection/Restoration Tasks/Intervals.

Indicates new/changed information.
1)    The PI must ensure that the operator incorporates the FAA Oversight Office-approved EWIS ICA inspections and procedures for EWIS into its maintenance and inspection program.
2)    The PI must ensure that the operator has policy and procedures in its manual to notify the PI of any revisions to the TC/STC holder inspection tasks and intervals.
3)    The TCH controlling reference numbers uniquely identify the EWIS ICAs for identification and traceability purposes throughout the operational life of the airplane. The operator should use these controlling reference numbers or an operator-developed system that correlates to these numbers for the purposes of traceability. This will help prevent inadvertent deletion, changes to the type of task, or escalation of EWIS ICAs without proper consideration of the reason for the task and its interval. The tracking system should correlate to the controlling reference number for the EWIS ICAs and be acceptable to the PI.
Indicates new/changed information.

6-2737    OPERATORS THAT ARE AUTHORIZED OPSPEC/MSPEC D097 FOR EWIS. The issuance of OpSpec D097 signifies the FAA has reviewed the certificate holder’s policy and procedures incorporated into their maintenance and inspection programs for compliance with § 121.1111 or 129.111 Aging Aircraft Program rules. Table 1 of D097 will consist of three columns that list:

    The Aging Aircraft Program rules;

    The manual and section where the policy and procedures are located for the applicable Aging Aircraft Program; and

    The date of the manual and section where the current policy and procedures are located for the applicable Aging Aircraft Program.

NOTE:  Figure 6-114 below illustrates a D097 Table 1 that lists the 14 CFR part rules.

Indicates new/changed information.

Figure 6-114.  Sample D097 Table 1 – Aging Aircraft Maintenance Programs

Aging Aircraft Program Rules

Certificate Holder’s Maintenance and/or Inspection Program Policy and Procedures (Manual and Section)

Date

Repairs Assessment for Pressurized Fuselages — § 121.1107, § 129.107

 

 

Supplemental Inspections — § 121.1109, § 129.109

 

 

Electrical Wiring Interconnection Systems (EWIS) Maintenance Program — § 121.1111, § 129.111

 

 

Fuel Tank System Maintenance Program — § 121.1113, § 129.113

 

 

Flammability Reduction Means — § 121.1117, § 129.117

 

 

A.    Submission to PI for Review. Initial submission and any later revisions to the operator/certificate holder’s maintenance and/or inspection program policy and procedures must be submitted to the PI for review for compliance with the Aging Aircraft Program rules.

B.    Operator Action. An operator/certificate holder must have procedures to ensure that ICAs are incorporated into their maintenance and/or inspection program.

C.    Procedures for Tracking Changes and Approvals. The PI must ensure that the operator/certificate holder has procedures in its manual that track any changes and approvals made to the FAA Oversight Office‑approved EWIS/FTS ICAs.

6-2738    TASK OUTCOMES. If not already accomplished, document that the operator has successfully incorporated the FAA Oversight Office-approved EWIS ICAs into its maintenance program by issuing or amending OpSpec D097.

A.    Complete the PTRS Record for Part 129 Operators. Open a new PTRS record using the PTRS codes in this section. Enter “EWIS” in the “National Use” block of section I. In section IV, the “Comment” block, annotate the following:

1)    Document that the operator has incorporated the applicable EWIS ICAs into its maintenance program.
2)    Record the signature date of the EWIS OpSpecs.

B.    Ongoing Surveillance of Part 121 Air Carriers. Follow SAS guidance.

C.    Ongoing Surveillance of Part 129 Operators. To ensure the operator continues to comply with its EWIS requirements, accomplish and record surveillance activities using the PTRS codes listed in this section, using “EWIS” in the “National Use” block. Enter the findings in the PTRS database in accordance with existing procedures.

Indicates new/changed information.

RESERVED. Paragraphs 6-2739 through 6-2754.