[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR33.35]

[Page 740]
 
                     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 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]