[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR33.17]

[Page 761-762]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 33--AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES--Table of Contents
 
               Subpart B--Design and Construction; General
 
Sec. 33.17  Fire prevention.

    (a) The design and construction of the engine and the materials used 
must minimize the probability of the occurrence and spread of fire. In 
addition, the design and construction of turbine engines must minimize 
the probability of the occurrence of an internal fire that could result 
in structural failure, overheating, or other hazardous conditions.
    (b) Except as provided in paragraphs (c), (d), and (e) of this 
section, each external line, fitting, and other component, which 
contains or conveys flammable fluid must be fire resistant. Components 
must be shielded or located to safeguard against the ignition of leaking 
flammable fluid.
    (c) Flammable fluid tanks and supports which are part of and 
attached to the engine must be fireproof or be enclosed by a fireproof 
shield unless damage by fire to any non-fireproof part will not cause 
leakage or spillage of flammable fluid. For a reciprocating engine 
having an integral oil sump of less than 25-quart capacity, the oil sump 
need not be fireproof nor be enclosed by fireproof shield.

[[Page 762]]

    (d) For turbine engines type certificated for use in supersonic 
aircraft, each external component which conveys or contains flammable 
fluid must be fireproof.
    (e) Unwanted accumulation of flammable fluid and vapor must be 
prevented by draining and venting.

(Secs. 313(a), 601, and 603, 72 Stat. 759, 775, 49 U.S.C. 1354(a), 1421, 
and 1423; sec. 6(c), 49 U.S.C. 1655(c))

[Amdt. 33-6, 39 FR 35464, Oct. 1, 1974, as amended by Amdt. 33-8, 42 FR 
15047, Mar. 17, 1977; Amdt. 33-10, 49 FR 6850, Feb. 23, 1984]