Federal Aviation

Administration

MMEL Policy Letter (PL) 102 Revision 2

Date:

December 17, 2012

To:

All Region Flight Standards Division Managers

All Aircraft Evaluation Group Managers

From:

Manager, Air Transportation Division, AFS-200

Reply to Attn of:

Manager, New Program Implementation and International Support Branch, AFS-240

Subject:

Cargo Compartment Smoke Detection and Fire Suppression Systems

MMEL CODE:

26 (FIRE PROTECTION)

REFERENCE:

PL-102, Revision 1, dated October 17, 2011

PL-102, Original, dated September 29, 1999

PURPOSE:

To provide standardized Master Minimum Equipment List (MMEL) requirements for both Cargo Compartment Smoke Detection and Fire Suppression (Extinguishing) Systems installed on transport category airplanes.

DISCUSSION:

Revision 2 incorporates the intended relief for "empty" (from MMEL PL-108) into the MMEL provisos. Previous fire suppression note for Class E cargo compartments moved to policy. Deleted unneeded statement in discussion.

Revision 1 removes the Global Change and clarifies relief for cargo holds with individual smoke detection zones.

14 CFR 25.855, 25.857, 25.858, and 121.314 upgrades the fire safety standards for cargo or baggage compartments by eliminating Class D compartments as an option for future type certification. Compartments that no longer can be designated as Class D. They are required to comply with the standards for either Class C or Class E compartments, as applicable.

Class D compartments in transport category airplanes manufactured under existing type certificates and used in passenger service were required to comply with both the fire detection and suppression standards for Class C compartments by March 19, 2001 for use in air carrier, commuter, on-demand, or most other commercial service. The Class D compartments manufactured under existing type certificates and used only for the carriage of cargo are required to comply with both the fire detection and suppression standards, or the detection standards for Class E compartments.


POLICY:

The following guidelines are provided for determining MMEL relief for both smoke detection and fire suppression (Extinguishing) systems installed in transport category aircraft.

Inoperative components of a system(s) may be considered for MMEL relief if it is determined that the smoke detection/suppression system will continue to function as intended.

Cargo holds that have individual smoke detection zones that continue to operate normally may be loaded provided the inoperative smoke detection zones remain empty.

Class E cargo compartments require only the installation of smoke or fire detection systems (not suppression).

 

 

 

 

 

 

 

 

 

 

 

26 FIRE PROTECTION

 

 

 

 

Cargo Compartment Smoke Detection Systems

C

-

0

(O) May be inoperative provided procedures are established and used to ensure the associated compartment or zone remains empty, or is verified to contain only empty cargo handling equipment, ballast (ballast may be loaded in ULDs), and/or fly away kits.

Note: Operator MELs should define which items are approved for inclusion in the fly away kits, and which materials can be used as ballast.

Cargo Compartment Fire Suppression Systems

C

-

0

(O) May be inoperative provided procedures are established and used to ensure the associated compartment remains empty, or is verified to contain only empty cargo handling equipment, ballast (ballast may be loaded in ULDs), and/or fly away kits.

Note: Operator MELs should define which items are approved for inclusion in the fly away kits, and which materials can be used as ballast.

 

 

Each Flight Operations Evaluation Board (FOEB) Chair should apply this Policy to affected MMELs through the normal FOEB process.

 

 

 

 

 

Leslie H. Smith

Manager, Air Transportation Division