VOLUME 2 AIR OPERATOR AND AIR AGENCY CERTIFICATION AND APPLICATION PROCESS
CHAPTER 8 CERTIFICATION OF A PART
Section 4 Restricted Category Agricultural Airplanes
2-1046 OBJECTIVE. This section contains general information concerning
Title 14 of the Code of Federal Regulations (14 CFR) Part
137, Agricultural Aircraft Operations.
A. Hopper. Container within the airplane structure to hold the aerially dispensed products.
B. Spray Boom. Length of pipe or tubing of variable size or shape,
depending upon the system and the particular application.
C. Spreader. Systems attached to the fixed points of the airplane,
under the hopper, which dispense dry agricultural chemicals and seed.
NOTE: The spreader includes its associated gate box.
2-1048 CIVIL AIR REGULATIONS (CAR) 8/CIVIL AERONAUTICS MANUAL (CAM) 8.
Pertinent parts of the preamble to CAR 8/CAM 8 state that the CARs provide for
the type and airworthiness certification of aircraft built or modified for special
purposes (e.g., crop dusting, seeding, and spraying). As stated in the preamble
to CAR 8, the requirements in effect at the time established an appropriate
level of safety for passenger-carrying aircraft, but imposed an unnecessary
economic burden and were unduly restrictive for the manufacture and operation
of small agricultural aircraft. These aircraft are intended for use in rural,
sparsely settled areas outside the usual lanes of air transportation. For restricted
category operations, where public safety is not in danger, it appears unreasonable
to require the same level of safety as that required for passenger-carrying
aircraft. Therefore, a change to CAR 8/CAM 8 eliminated the “equivalent level
of safety” provision for restricted category aircraft. It should be noted that
nothing in CAR 8 was intended to contradict the statutory requirement that the
Administrator must find that the airplane is of proper design, material specifications,
construction, and performance for safe operation. CAR 8 is intended to provide
the greatest possible flexibility of administration and to place the minimum
possible burden consistent with public safety on the applicant for certification
in the restricted category.
NOTE: The part of CAR 8 which provided the procedures for the type certification
of restricted category aircraft was recodified as 14 CFR part
That section currently provides type certification procedures for restricted category airplanes.
A. Small Agricultural Airplanes. The current edition of Advisory Circular (AC)
Technical Information Regarding Civil Aeronautics Manuals 1,
3, 4a, 4b, 5, 6, 7, 8, 9, 13, and 14, states that CAM 8 may be used in conjunction with §§
restricted category certification of small agricultural airplanes only. The material in CAM 8 may only be
used for small agricultural airplanes in the following situations:
1) For alterations made to small airplanes originally type-certificated
(TC) under CAR 8. The guidance materials in CAM 8 are applicable, but only for
those alterations where the CAM 8 guidance material is appropriate.
2) For alterations made to small airplanes originally TC’d under 14 CFR parts
The material in CAM 8 may be used as guidance material to assist in showing compliance with part
but only for those alterations where the CAM 8 material is appropriate and is not in conflict with the intent of
part 23 requirements.
NOTE: The term “appropriate,” when used in discussing requirements,
means those requirements address a specific feature of a type design, and can
be used to evaluate the safety aspect of that feature.
B. Gross Weight Increases. CAM 8 sets forth acceptable procedures and practices
for guidance, including appendixes A and B, for those airplanes which were certificated under CAR 8. The use of
CAM 8 in approving gross weight increases has only been appropriate for airplanes if CAR 8 was used as part of
the certification basis. For airplanes certificated under parts
CAM 8 may be considered to contain acceptable methods of complying with
the regulations as the basis for a field approval, if the information is not
contrary to the airplane’s certification basis or the manufacturer’s requirements.
C. Alterations. Alterations approved for an airplane can be installed
on other airplanes of the same make and model, provided:
1) The airplanes are owned by the individual that originally obtained the approval.
2) The installer finds that the alteration does not interfere
with any previously approved alteration on that specific airplane.
NOTE: Subsequent alterations will be considered minor alterations when
performed by the owner on his or her own aircraft. The owner must remove this system when the aircraft
is sold or transferred and an appropriate entry must be made in the aircraft’s records.
D. Spreader and Spray Boom Systems Installation and Removal.
The initial installation of either a spreader or spray boom is considered a
major change and requires FAA approval. That approval can be attained as part
of the original TC, an amended TC, a Supplemental Type Certificate (STC), or
a field approval. Spreader and spray boom systems removal and installation are
not addressed in CAM 8 or in the 14 CFR part
Once FAA approval has been obtained for more than one configuration, changing from one configuration
to another is a service requirement; therefore, it does not constitute maintenance and does not require
record entries. However, these system changes or reconfigurations should not include changes to
structural attachments or the permanently installed equipment of the airplane.
E. Changing From One Configuration to Another. Changing from
one configuration to another can be accomplished by the operator as long as
it is done in accordance with conversion instructions covering the installation
and removal of the components or equipment. These instructions are normally
prepared during the original approval of the installation, but must be developed
by the operator if not accomplished at that time. The operator is also responsible
for properly training those persons servicing the aircraft.
2-1049 FIELD APPROVALS. The inspector should consider alterations
to agricultural aircraft that require FAA approval on an individual basis. The
inspector should consider the following information:
A. Acceptability of CAM 8. CAM 8 is acceptable only when the
requirements are appropriate for alterations of small agricultural airplanes
that used CAR 8 as the original certification basis. CAM 8 and its appendixes
A and B should be referenced by specific application to the requested modification.
The CAM 8 guidance, along with any pertinent data, can be used to complete the field approval process.
NOTE: The guidance material in CAM 8 may be used to assist in showing compliance with part
small agricultural airplanes only, but only when the guidance material is not in conflict with the requirements of part
B. Eligibility Exceptions. Conversion from reciprocating to turbine/turboprop
engines is not allowed under the field approval process.
2-1050 RECORDKEEPING. With regard to all references to Form ACA 337 (now FAA Form
Major Repair and Alteration (Airframe, Powerplant, Propeller,
or Appliance)) stated in CAM 8, the standard procedures outlined in the current edition of AC
Maintenance Records, should be used to fill out FAA
Form 337. Other
information, such as flight test and Weight and Balance (W&B), will be recorded in the aircraft maintenance records.
RESERVED. Paragraphs 2-1051 through 2-1065.