777 

Federal Aviation Administration, DOT 

§ 36.1581 

for which application for a type certifi-
cate in the primary category is made, 
and that was not previously certifi-
cated under appendix H of this part, 
compliance with appendix H of this 
part must be shown. 

(2) For a helicopter that: 
(i) Has a normal or transport type 

certificate issued under this chapter, 

(ii) Has a standard airworthiness cer-

tificate issued under this chapter, 

(iii) Has not undergone an acoustical 

change from its type design, 

(iv) Has not previously been certifi-

cated under appendix H of this part, 
and 

(v) For which application for conver-

sion to the primary category is made, 
no further showing of compliance with 
this part is required. 

[Doc. No. 26910, 57 FR 42855, Sept. 16, 1992, as 
amended by Amdt. 36–30, 79 FR 12045, Mar. 4, 
2014] 

Subparts I–J 

[

Reserved

] 

Subpart K—Tiltrotors 

S

OURCE

: 78 FR 1139, Jan. 8, 2013, unless oth-

erwise noted. 

§ 36.1101

Noise measurement and eval-

uation. 

For tiltrotors, the noise generated 

must be measured and evaluated under 
Appendix K of this part, or under an 
approved equivalent procedure. 

§ 36.1103

Noise limits. 

(a) Compliance with the maximum 

noise levels prescribed in Appendix K 
of this part must be shown for a 
tiltrotor for which the application for 
the issuance of a type certificate is 
made on or after March 11, 2013. 

(b) To demonstrate compliance with 

this part, noise levels may not exceed 
the noise limits listed in Appendix K, 
Section K4, Noise Limits of this part. 
Appendix K of this part (or an approved 
equivalent procedure) must also be 
used to evaluate and demonstrate com-
pliance with the approved test proce-
dures, and at the applicable noise 
measurement points. 

Subparts L–N 

[

Reserved

] 

Subpart O—Documentation, Op-

erating Limitations and Infor-
mation 

§ 36.1501

Procedures, noise levels and 

other information. 

(a) All procedures, weights, configu-

rations, and other information or data 
employed for obtaining the certified 
noise levels prescribed by this part, in-
cluding equivalent procedures used for 
flight, testing, and analysis, must be 
developed and approved. Noise levels 
achieved during type certification 
must be included in the approved air-
plane (rotorcraft) flight manual. 

(b) Where supplemental test data are 

approved for modification or extension 
of an existing flight data base, such as 
acoustic data from engine static tests 
used in the certification of acoustical 
changes, the test procedures, physical 
configuration, and other information 
and procedures that are employed for 
obtaining the supplemental data must 
be developed and approved. 

[Amdt. 36–15, 53 FR 16366, May 6, 1988] 

§ 36.1581

Manuals, markings, and plac-

ards. 

(a) If an Airplane Flight Manual or 

Rotorcraft Flight Manual is approved, 
the approved portion of the Airplane 
Flight Manual or Rotorcraft Flight 
Manual must contain the following in-
formation, in addition to that specified 
under § 36.1583 of this part. If an Air-
plane Flight Manual or Rotorcraft 
Flight Manual is not approved, the pro-
cedures and information must be fur-
nished in any combination of approved 
manual material, markings, and plac-
ards. 

(1) For transport category large air-

planes and jet airplanes, the noise level 
information must be one value for each 
flyover, lateral, and approach as de-
fined and required by appendix B of 
this part, along with the maximum 
takeoff weight, maximum landing 
weight, and configuration. 

(2) For propeller driven small air-

planes, the noise level information 
must be one value for takeoff as de-
fined and required by appendix G of 
this part, along with the maximum 
takeoff weight and configuration. 

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