Powerplant fire protection.
CFR · 2024-01-01 · US · Title 14
(a) Designated fire zones must be protected from fire by compliance with §§ 121.255 through 121.261. (b) Designated fire zones are— (1) Engine accessory sections; (2) Installations where no isolation is provided between the engine and accessory compartment; and (3) Areas that contain auxiliary power units, fuel-burning heaters, and other combustion equipment.
official document · source cfr-2024 · id 14:§ 121.253