(a) In each area where flammable fluids or vapors might escape by
leakage of a fluid system, there must be means to minimize the probability
of ignition of the fluids and vapors, and the resultant hazards if
ignition does occur.
(b) Compliance with paragraph (a) of this section must be shown by
analysis or tests, and the following factors must be considered:
(1) Possible sources and paths of fluid leakage, and means of detecting
leakage.
(2) Flammability characteristics of fluids, including effects of any
combustible or absorbing materials.
(3) Possible ignition sources, including electrical faults, overheating
of equipment, and malfunctioning of protective devices.
(4) Means available for controlling or extinguishing a fire, such as
stopping flow of fluids, shutting down equipment, fireproof containment,
or use of extinguishing agents.
(5) Ability of rotorcraft components that are critical to safety of
flight to withstand fire and heat.
(c) If action by the flight crew is required to prevent or counteract a
fluid fire (e.g. equipment shutdown or actuation of a fire extinguisher),
quick acting means must be provided to alert the crew.
(d) Each area where flammable fluids or vapors might escape by leakage
of a fluid system must be identified and defined. (Secs. 313(a),
601, 603, 604, Federal Aviation Act of 1958 (49 U.S.C. 1354(a), 1421,
1423, 1424), sec. 6(c), Dept. of Transportation Act (49 U.S.C. 1655(c)))