150 

14 CFR Ch. I (1–1–19 Edition) 

§ 121.379 

outside the United States, each person 
who is directly in charge of mainte-
nance, preventive maintenance, or al-
terations, and each person performing 
required inspections must hold an ap-
propriate airman certificate. 

(b) For the purposes of this section, a 

person 

directly in charge 

is each person 

assigned to a position in which he is re-
sponsible for the work of a shop or sta-
tion that performs maintenance, pre-
ventive maintenance, alterations, or 
other functions affecting aircraft air-
worthiness. A person who is 

directly in 

charge 

need not physically observe and 

direct each worker constantly but 
must be available for consultation and 
decision on matters requiring instruc-
tion or decision from higher authority 
than that of the persons performing 
the work. 

[Doc. No. 6258, 29 FR 19210, Dec. 31, 1964, as 
amended by Amdt. 121–21, 31 FR 10618, Aug. 9, 
1966; Amdt. 121–286, 66 FR 41116, Aug. 6, 2001] 

§ 121.379

Authority to perform and ap-

prove maintenance, preventive 
maintenance, and alterations. 

(a) A certificate holder may perform, 

or it may make arrangements with 
other persons to perform, maintenance, 
preventive maintenance, and alter-
ations as provided in its continuous 
airworthiness maintenance program 
and its maintenance manual. In addi-
tion, a certificate holder may perform 
these functions for another certificate 
holder as provided in the continuous 
airworthiness maintenance program 
and maintenance manual of the other 
certificate holder. 

(b) A certificate holder may approve 

any aircraft, airframe, aircraft engine, 
propeller, or appliance for return to 
service after maintenance, preventive 
maintenance, or alterations that are 
performed under paragraph (a) of this 
section. However, in the case of a 
major repair or major alteration, the 
work must have been done in accord-
ance with technical data approved by 
the Administrator. 

[Doc. No. 10289, 35 FR 16793, Oct. 30, 1970] 

§ 121.380

Maintenance recording re-

quirements. 

(a) Each certificate holder shall keep 

(using the system specified in the man-
ual required in § 121.369) the following 

records for the periods specified in 
paragraph (c) of this section: 

(1) All the records necessary to show 

that all requirements for the issuance 
of an airworthiness release under 
§ 121.709 have been met. 

(2) Records containing the following 

information: 

(i) The total time in service of the 

airframe. 

(ii) Except as provided in paragraph 

(b) of this section, the total time in 
service of each engine and propeller. 

(iii) The current status of life-limited 

parts of each airframe, engine, pro-
peller, and appliance. 

(iv) The time since last overhaul of 

all items installed on the aircraft 
which are required to be overhauled on 
a specified time basis. 

(v) The identification of the current 

inspection status of the aircraft, in-
cluding the times since the last inspec-
tions required by the inspection pro-
gram under which the aircraft and its 
appliances are maintained. 

(vi) The current status of applicable 

airworthiness directives, including the 
date and methods of compliance, and, 
if the airworthiness directive involves 
recurring action, the time and date 
when the next action is required. 

(vii) A list of current major alter-

ations to each airframe, engine, pro-
peller, and appliance. 

(b) A certificate holder need not 

record the total time in service of an 
engine or propeller on a transport cat-
egory cargo airplane, a transport cat-
egory airplane that has a passenger 
seat configuration of more than 30 
seats, or a nontransport category air-
plane type certificated before January 
1, 1958, until the following, whichever 
occurs first: 

(1) March 20, 1997; or 
(2) The date of the first overhaul of 

the engine or propeller, as applicable, 
after January 19, 1996. 

(c) Each certificate holder shall re-

tain the records required to be kept by 
this section for the following periods: 

(1) Except for the records of the last 

complete overhaul of each airframe, 
engine, propeller, and appliance, the 
records specified in paragraph (a)(1) of 
this section shall be retained until the 
work is repeated or superseded by 

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