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Federal Aviation Administration, DOT 

§ 121.367 

§ 121.360


Subpart L—Maintenance, Preven-

tive Maintenance, and Alter-



: Docket No. 6258, 29 FR 19210, Dec. 

31, 1964, unless otherwise noted. 

§ 121.361


(a) Except as provided by paragraph 

(b) of this section, this subpart pre-
scribes requirements for maintenance, 
preventive maintenance, and alter-
ations for all certificate holders. 

(b) The Administrator may amend a 

certificate holder’s operations speci-
fications to permit deviation from 
those provisions of this subpart that 
would prevent the return to service and 
use of airframe components, power-
plants, appliances, and spare parts 
thereof because those items have been 
maintained, altered, or inspected by 
persons employed outside the United 
States who do not hold U.S. airman 
certificates. Each certificate holder 
who uses parts under this deviation 
must provide for surveillance of facili-
ties and practices to assure that all 
work performed on these parts is ac-
complished in accordance with the cer-
tificate holder’s manual. 

[Doc. No. 8754, 33 FR 14406, Sept. 25, 1968] 

§ 121.363

Responsibility for airworthi-


(a) Each certificate holder is pri-

marily responsible for— 

(1) The airworthiness of its aircraft, 

including airframes, aircraft engines, 
propellers, appliances, and parts there-
of; and 

(2) The performance of the mainte-

nance, preventive maintenance, and al-
teration of its aircraft, including air-
frames, aircraft engines, propellers, ap-
pliances, emergency equipment, and 
parts thereof, in accordance with its 
manual and the regulations of this 

(b) A certificate holder may make ar-

rangements with another person for 
the performance of any maintenance, 
preventive maintenance, or alter-
ations. However, this does not relieve 
the certificate holder of the responsi-

bility specified in paragraph (a) of this 

[Doc. No. 6258, 29 FR 19210, Dec. 31, 1964, as 
amended by Amdt. 121–106, 38 FR 22378, Aug. 
20, 1973] 

§ 121.365

Maintenance, preventive 

maintenance, and alteration organi-

(a) Each certificate holder that per-

forms any of its maintenance (other 
than required inspections), preventive 
maintenance, or alterations, and each 
person with whom it arranges for the 
performance of that work must have an 
organization adequate to perform the 

(b) Each certificate holder that per-

forms any inspections required by its 
manual in accordance with 
§ 121.369(b)(2) or (3) (in this subpart re-
ferred to as required inspections) and 
each person with whom it arranges for 
the performance of that work must 
have an organization adequate to per-
form that work. 

(c) Each person performing required 

inspections in addition to other main-
tenance, preventive maintenance, or 
alterations, shall organize the perform-
ance of those functions so as to sepa-
rate the required inspection functions 
from the other maintenance, preven-
tive maintenance, and alteration func-
tions. The separation shall be below 
the level of administrative control at 
which overall responsibility for the re-
quired inspection functions and other 
maintenance, preventive maintenance, 
and alteration functions are exercised. 

[Doc. No. 6258, 29 FR 19210, Dec. 31, 1964, as 
amended by Amdt. 121–3, 30 FR 3639, Mar. 19, 

§ 121.367

Maintenance, preventive 

maintenance, and alterations pro-

Each certificate holder shall have an 

inspection program and a program cov-
ering other maintenance, preventive 
maintenance, and alterations that en-
sures that— 

(a) Maintenance, preventive mainte-

nance, and alterations performed by it, 
or by other persons, are performed in 
accordance with the certificate hold-
er’s manual; 

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