[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: 14CFR33.7]

[Page 736-737]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 33--AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES--Table of Contents
 
                           Subpart A--General
 
Sec. 33.7  Engine ratings and operating limitations.

    (a) Engine ratings and operating limitations are established by the 
Administrator and included in the engine certificate data sheet 
specified in Sec. 21.41 of this chapter, including ratings and 
limitations based on the operating conditions and information specified 
in this section, as applicable, and any other information found 
necessary for safe operation of the engine.
    (b) For reciprocating engines, ratings and operating limitations are 
established relating to the following:
    (1) Horsepower or torque, r.p.m., manifold pressure, and time at 
critical pressure altitude and sea level pressure altitude for--
    (i) Rated maximum continuous power (relating to unsupercharged 
operation or to operation in each supercharger mode as applicable); and
    (ii) Rated takeoff power (relating to unsupercharged operation or to 
operation in each supercharger mode as applicable).
    (2) Fuel grade or specification.
    (3) Oil grade or specification.
    (4) Temperature of the--
    (i) Cylinder;
    (ii) Oil at the oil inlet; and
    (iii) Turbosupercharger turbine wheel inlet gas.
    (5) Pressure of--
    (i) Fuel at the fuel inlet; and
    (ii) Oil at the main oil gallery.
    (6) Accessory drive torque and overhang moment.
    (7) Component life.
    (8) Turbosupercharger turbine wheel r.p.m.
    (c) For turbine engines, ratings and operating limitations are 
established relating to the following:
    (1) Horsepower, torque, or thrust, r.p.m., gas temperature, and time 
for--
    (i) Rated maximum continuous power or thrust (augmented);
    (ii) Rated maximum continuous power or thrust (unaugmented);
    (iii) Rated takeoff power or thrust (augmented);
    (iv) Rated takeoff power or thrust (unaugmented);
    (v) Rated 30-minute OEI power;
    (vi) Rated 2\1/2\-minute OEI power;
    (vii) Rated continuous OEI power; and
    (viii) Rated 2-minute OEI Power;
    (ix) Rated 30-second OEI power; and
    (x) Auxiliary power unit (APU) mode of operation.
    (2) Fuel designation or specification.
    (3) Oil grade or specification.
    (4) Hydraulic fluid specification.
    (5) Temperature of--
    (i) Oil at a location specified by the applicant;
    (ii) Induction air at the inlet face of a supersonic engine, 
including steady state operation and transient over-temperature and time 
allowed;
    (iii) Hydraulic fluid of a supersonic engine;
    (iv) Fuel at a location specified by the applicant; and
    (v) External surfaces of the engine, if specified by the applicant.
    (6) Pressure of--
    (i) Fuel at the fuel inlet;
    (ii) Oil at a location specified by the applicant;
    (iii) Induction air at the inlet face of a supersonic engine, 
including steady state operation and transient overpressure and time 
allowed; and
    (iv) Hydraulic fluid.
    (7) Accessory drive torque and overhang moment.
    (8) Component life.
    (9) Fuel filtration.
    (10) Oil filtration.
    (11) Bleed air.

[[Page 737]]

    (12) The number of start-stop stress cycles approved for each rotor 
disc and spacer.
    (13) Inlet air distortion at the engine inlet.
    (14) Transient rotor shaft overspeed r.p.m., and number of overspeed 
occurrences.
    (15) Transient gas overtemperature, and number of overtemperature 
occurrences.
    (16) For engines to be used in supersonic aircraft, engine rotor 
windmilling rotational r.p.m.

[Amdt. 33-6, 39 FR 35463, Oct. 1, 1974, as amended by Amdt. 33-10, 49 FR 
6850, Feb. 23, 1984; Amdt. 33-11, 51 FR 10346, Mar. 25, 1986; Amdt. 33-
12, 53 FR 34220, Sept. 2, 1988; Amdt. 33-18, 61 FR 31328, June 19, 1996]