[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: 14CFR23.33]



[Page 183]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION

 

PART 23_AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND 

COMMUTER CATEGORY AIRPLANES--Table of Contents

 

                            Subpart B_Flight

 

Sec. 23.33  Propeller speed and pitch limits.



    (a) General. The propeller speed and pitch must be limited to values 

that will assure safe operation under normal operating conditions.

    (b) Propellers not controllable in flight. For each propeller whose 

pitch cannot be controlled in flight--

    (1) During takeoff and initial climb at the all engine(s) operating 

climb speed specified in Sec. 23.65, the propeller must limit the 

engine r.p.m., at full throttle or at maximum allowable takeoff manifold 

pressure, to a speed not greater than the maximum allowable takeoff 

r.p.m.; and

    (2) During a closed throttle glide, at VNE, the propeller may not 

cause an engine speed above 110 percent of maximum continuous speed.

    (c) Controllable pitch propellers without constant speed controls. 

Each propeller that can be controlled in flight, but that does not have 

constant speed controls, must have a means to limit the pitch range so 

that--

    (1) The lowest possible pitch allows compliance with paragraph 

(b)(1) of this section; and

    (2) The highest possible pitch allows compliance with paragraph 

(b)(2) of this section.

    (d) Controllable pitch propellers with constant speed controls. Each 

controllable pitch propeller with constant speed controls must have--

    (1) With the governor in operation, a means at the governor to limit 

the maximum engine speed to the maximum allowable takeoff r.p.m.; and

    (2) With the governor inoperative, the propeller blades at the 

lowest possible pitch, with takeoff power, the airplane stationary, and 

no wind, either--

    (i) A means to limit the maximum engine speed to 103 percent of the 

maximum allowable takeoff r.p.m., or

    (ii) For an engine with an approved overspeed, a means to limit the 

maximum engine and propeller speed to not more than the maximum approved 

overspeed.



[Doc. No. 4080, 29 FR 17955, Dec. 18, 1964, as amended by Amdt. 23-45, 

58 FR 42156, Aug. 6, 1993; Amdt. 23-50, 61 FR 5183, Feb. 9, 1996]



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