[Code of Federal Regulations]

[Title 14, Volume 1]

[Revised as of January 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 14CFR33.35]



[Page 772-773]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION

 

PART 33_AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES--Table of Contents

 

    Subpart C_Design and Construction; Reciprocating Aircraft Engines

 

Sec. 33.35  Fuel and induction system.



    (a) The fuel system of the engine must be designed and constructed 

to supply an appropriate mixture of fuel to the cylinders throughout the 

complete operating range of the engine



[[Page 773]]



under all flight and atmospheric conditions.

    (b) The intake passages of the engine through which air or fuel in 

combination with air passes for combustion purposes must be designed and 

constructed to minimize the danger of ice accretion in those passages. 

The engine must be designed and constructed to permit the use of a means 

for ice prevention.

    (c) The type and degree of fuel filtering necessary for protection 

of the engine fuel system against foreign particles in the fuel must be 

specified. The applicant must show that foreign particles passing 

through the prescribed filtering means will not critically impair engine 

fuel system functioning.

    (d) Each passage in the induction system that conducts a mixture of 

fuel and air must be self-draining, to prevent a liquid lock in the 

cylinders, in all attitudes that the applicant establishes as those the 

engine can have when the aircraft in which it is installed is in the 

static ground attitude.

    (e) If provided as part of the engine, the applicant must show for 

each fluid injection (other than fuel) system and its controls that the 

flow of the injected fluid is adequately controlled.



[Doc. No. 3025, 29 FR 7453, June 10, 1964, as amended by Amdt. 33-10, 49 

FR 6851, Feb. 23, 1984]