504 

14 CFR Ch. I (1–1–19 Edition) 

§ 135.437 

shop or station that performs mainte-
nance, preventive maintenance, alter-
ations, or other functions affecting 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 person performing the 
work. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–82, 66 FR 41117, Aug. 6, 
2001] 

§ 135.437

Authority to perform and ap-

prove maintenance, preventive 
maintenance, and alterations. 

(a) A certificate holder may perform 

or make arrangements with other per-
sons to perform maintenance, preven-
tive maintenance, and alterations as 
provided in its maintenance manual. In 
addition, a certificate holder may per-
form these functions for another cer-
tificate holder as provided in the main-
tenance manual of the other certificate 
holder. 

(b) A certificate holder may approve 

any airframe, aircraft engine, pro-
peller, rotor, 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 alteration, the work 
must have been done in accordance 
with technical data approved by the 
Administrator. 

§ 135.439

Maintenance recording re-

quirements. 

(a) Each certificate holder shall keep 

(using the system specified in the man-
ual required in § 135.427) the following 
records for the periods specified in 
paragraph (b) of this section: 

(1) All the records necessary to show 

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

(2) Records containing the following 

information: 

(i) The total time in service of the 

airframe, engine, propeller, and rotor. 

(ii) The current status of life-limited 

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

(iii) The time since last overhaul of 

each item installed on the aircraft 
which are required to be overhauled on 
a specified time basis. 

(iv) The identification of the current 

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

(v) 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. 

(vi) A list of current major alter-

ations and repairs to each airframe, en-
gine, propeller, rotor, and appliance. 

(b) 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, rotor, and appliance 
the records specified in paragraph (a)(1) 
of this section shall be retained until 
the work is repeated or superseded by 
other work or for one year after the 
work is performed. 

(2) The records of the last complete 

overhaul of each airframe, engine, pro-
peller, rotor, and appliance shall be re-
tained until the work is superseded by 
work of equivalent scope and detail. 

(3) The records specified in paragraph 

(a)(2) of this section shall be retained 
and transferred with the aircraft at the 
time the aircraft is sold. 

(c) The certificate holder shall make 

all maintenance records required to be 
kept by this section available for in-
spection by the Administrator or any 
representative of the National Trans-
portation Safety Board. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978; 43 
FR 49975, Oct. 26, 1978] 

§ 135.441

Transfer of maintenance 

records. 

Each certificate holder who sells a 

United States registered aircraft shall 
transfer to the purchaser, at the time 
of the sale, the following records of 
that aircraft, in plain language form or 
in coded form which provides for the 
preservation and retrieval of informa-
tion in a manner acceptable to the Ad-
ministrator: 

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