14 C.F.R. § 125.171 Fire-detector systems.
Title 14 - Aeronautics and Space
Enough quick-acting fire detectors must be provided in each designated fire zone to assure the detection of any fire that may occur in that zone.
Title 14: Aeronautics and Space
PART 125—CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6,000 POUNDS OR MORE; AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT
Subpart E—Special Airworthiness Requirements
§ 125.171 Fire-detector systems.
