(a)
Designated fire zones are—
(1)
The engine power section;
(2)
The engine accessory section;
(3)
Except for reciprocating engines, any complete powerplant compartment in which no isolation is provided between the engine power section and the engine accessory section;
(4)
Any auxiliary power unit compartment;
(5)
Any fuel-burning heater and other combustion equipment installation described in § 25.859 ;
(6)
The compressor and accessory sections of turbine engines; and
(7)
Combustor, turbine, and tailpipe sections of turbine engine installations that contain lines or components carrying flammable fluids or gases.
Code of Federal Regulations
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-11, 32 FR 6913, May 5, 1967; Amdt. 25-23, 35 FR 5677, Apr. 8, 1970; Amdt. 25-72, 55 FR 29785, July 20, 1990; Amdt. 25-115, 69 FR 40527, July 2, 2004]