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14 CFR Ch. I (1–1–24 Edition) 

§ 135.433 

pending a decision by the Adminis-
trator. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–60, 61 FR 2617, Jan. 26, 
1996; Docket FAA–2018–0119, Amdt. 135–139, 83 
FR 9175, Mar. 5, 2018] 

§ 135.433 Maintenance and preventive 

maintenance training program. 

Each certificate holder or a person 

performing maintenance or preventive 
maintenance functions for it shall have 
a training program to ensure that each 
person (including inspection personnel) 
who determines the adequacy of work 
done is fully informed about procedures 
and techniques and new equipment in 
use and is competent to perform that 
person’s duties. 

§ 135.435 Certificate requirements. 

(a) Except for maintenance, preven-

tive maintenance, alterations, and re-
quired inspections performed by a cer-
tificated repair station that is located 
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 purpose of this section, a 

person 

directly in charge 

is each person 

assigned to a position in which that 
person is responsible for the work of a 
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