765 

Federal Aviation Administration, DOT 

§ 36.1 

75,000 pounds and that are powered by 
Pratt & Whitney Turbo Wasp JT3D se-
ries engines; and 

(iii) December 31, 1974, for airplanes 

with maximum weights of 75,000 pounds 
and less. 

(2) The provisions of this part in ef-

fect on October 13, 1977, including the 
stage 2 noise limits, for Concorde air-
planes that have not had flight time 
before January 1, 1980. 

(e) Each person who applies for the 

original issue of a standard airworthi-
ness certificate under § 21.183, or for the 
original issue of a restricted category 
airworthiness certificate under § 21.185, 
for propeller-driven, commuter cat-
egory airplanes for a propeller driven 
small airplane that has not had any 
flight time before January 1, 1980, must 
show compliance with the applicable 
provisions of this part. 

(f) For the purpose of showing com-

pliance with this part for transport 
category large airplanes and jet air-
planes regardless of category, the fol-
lowing terms have the following mean-
ings: 

(1) A ‘‘Stage 1 noise level’’ means a 

flyover, lateral or approach noise level 
greater than the Stage 2 noise limits 
prescribed in section B36.5(b) of appen-
dix B of this part. 

(2) A ‘‘Stage 1 airplane’’ means an 

airplane that has not been shown under 
this part to comply with the flyover, 
lateral, and approach noise levels re-
quired for Stage 2 or Stage 3 airplanes. 

(3) A ‘‘Stage 2 noise level’’ means a 

noise level at or below the Stage 2 
noise limits prescribed in section 
B36.5(b) of appendix B of this part but 
higher than the Stage 3 noise limits 
prescribed in section B36.5(c) of appen-
dix B of this part. 

(4) A ‘‘Stage 2 airplane’’ means an 

airplane that has been shown under 
this part to comply with Stage 2 noise 
levels prescribed in section B36.5(b) of 
appendix B of this part (including use 
of the applicable tradeoff provisions 
specified in section B36.6) and that does 
not comply with the requirements for a 
Stage 3 airplane. 

(5) A ‘‘Stage 3 noise level’’ means a 

noise level at or below the Stage 3 
noise limits prescribed in section 
B36.5(c) of appendix B of this part. 

(6) A ‘‘Stage 3 airplane’’ means an 

airplane that has been shown under 
this part to comply with Stage 3 noise 
levels prescribed in section B36.5(c) of 
appendix B of this part (including use 
of the applicable tradeoff provisions 
specified in section B36.6). 

(7) A ‘‘subsonic airplane’’ means an 

airplane for which the maximum oper-
ating limit speed, M

mo

, does not exceed 

a Mach number of 1. 

(8) A ‘‘supersonic airplane’’ means an 

airplane for which the maximum oper-
ating limit speed, M

mo

, exceeds a Mach 

number of 1. 

(9) A ‘‘Stage 4 noise level’’ means a 

noise level at or below the Stage 4 
noise limit prescribed in section 
B36.5(d) of appendix B of this part. 

(10) A ‘‘Stage 4 airplane’’ means an 

airplane that has been shown under 
this part not to exceed the Stage 4 
noise limit prescribed in section 
B36.5(d) of appendix B of this part. 

(11) A ‘‘Chapter 4 noise level’’ means 

a noise level at or below the maximum 
noise level prescribed in Chapter 4, 
Paragraph 4.4, Maximum Noise Levels, 
of the International Civil Aviation Or-
ganization (ICAO) Annex 16, Volume I, 
Amendment 7, effective March 21, 2002. 
[Incorporated by reference, see § 36.6]. 

(12) A ‘‘Stage 5 noise level’’ means a 

noise level at or below the Stage 5 
noise limit prescribed in section 
B36.5(e) of appendix B to this part. 

(13) A ‘‘Stage 5 airplane’’ means an 

airplane that has been shown under 
this part not to exceed the Stage 5 
noise limit prescribed in section 
B36.5(e) of appendix B to this part. 

(14) A ‘‘Chapter 14 noise level’’ means 

a noise level at or below the Chapter 14 
maximum noise level prescribed in 
Chapter 14 of the ICAO Annex 16, Vol-
ume 1, Seventh Edition, Amendment 
11–B (Incorporated by reference, see 
§ 36.6). 

(g) For the purpose of showing com-

pliance with this part for transport 
category large airplanes and jet air-
planes regardless of category, each air-
plane may not be identified as com-
plying with more than one stage or 
configuration simultaneously. 

(h) For the purpose of showing com-

pliance with this part, for helicopters 
in the primary, normal, transport, and 

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