758 

14 CFR Ch. I (1–1–24 Edition) 

§ 35.4 

operating pressure, and filtration lev-
els; and 

(6) State the assumptions made to 

comply with the requirements of this 
part. 

(b) Instructions for operating the 

propeller which must specify all proce-
dures necessary for operating the pro-
peller within the limitations of the 
propeller type design. 

[Amdt. 35–8, 73 FR 63346, Oct. 24, 2008] 

§ 35.4

Instructions for Continued Air-

worthiness. 

The applicant must prepare Instruc-

tions for Continued Airworthiness in 
accordance with appendix A to this 
part that are acceptable to the Admin-
istrator. The instructions may be in-
complete at type certification if a pro-
gram exists to ensure their completion 
prior to delivery of the first aircraft 
with the propeller installed, or upon 
issuance of a standard certificate of 
airworthiness for an aircraft with the 
propeller installed, whichever occurs 
later. 

[Amdt. 35–5, 45 FR 60181, Sept. 11, 1980] 

§ 35.5

Propeller ratings and operating 

limitations. 

(a) Propeller ratings and operating 

limitations must: 

(1) Be established by the applicant 

and approved by the Administrator. 

(2) Be included directly or by ref-

erence in the propeller type certificate 
data sheet, as specified in § 21.41 of this 
chapter. 

(3) Be based on the operating condi-

tions demonstrated during the tests re-
quired by this part as well as any other 
information the Administrator re-
quires as necessary for the safe oper-
ation of the propeller. 

(b) Propeller ratings and operating 

limitations must be established for the 
following, as applicable: 

(1) Power and rotational speed: 
(i) For takeoff. 
(ii) For maximum continuous. 
(iii) If requested by the applicant, 

other ratings may also be established. 

(2) Overspeed and overtorque limits. 

[Amdt. 35–8, 73 FR 63346, Oct. 24, 2008] 

§ 35.7

Features and characteristics. 

(a) The propeller may not have fea-

tures or characteristics, revealed by 
any test or analysis or known to the 
applicant, that make it unsafe for the 
uses for which certification is re-
quested. 

(b) If a failure occurs during a certifi-

cation test, the applicant must deter-
mine the cause and assess the effect on 
the airworthiness of the propeller. The 
applicant must make changes to the 
design and conduct additional tests 
that the Administrator finds necessary 
to establish the airworthiness of the 
propeller. 

[Amdt. 35–8, 73 FR 63346, Oct. 24, 2008] 

Subpart B—Design and 

Construction 

§ 35.11

[Reserved] 

§ 35.13

[Reserved] 

§ 35.15

Safety analysis. 

(a)(1) The applicant must analyze the 

propeller system to assess the likely 
consequences of all failures that can 
reasonably be expected to occur. This 
analysis will take into account, if ap-
plicable: 

(i) The propeller system in a typical 

installation. When the analysis de-
pends on representative components, 
assumed interfaces, or assumed in-
stalled conditions, the assumptions 
must be stated in the analysis. 

(ii) Consequential secondary failures 

and dormant failures. 

(iii) Multiple failures referred to in 

paragraph (d) of this section, or that 
result in the hazardous propeller ef-
fects defined in paragraph (g)(1) of this 
section. 

(2) The applicant must summarize 

those failures that could result in 
major propeller effects or hazardous 
propeller effects defined in paragraph 
(g) of this section, and estimate the 
probability of occurrence of those ef-
fects. 

(3) The applicant must show that 

hazardous propeller effects are not pre-
dicted to occur at a rate in excess of 
that defined as extremely remote 
(probability of 10

¥

7

or less per propeller 

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