Section 121.379

14 CFR Ch. I (1-1-19 Edition)

outside the United States, each person
who is directly in charge of maintenance, preventive maintenance, or alterations, and each person performing
required inspections must hold an appropriate 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 responsible for the work of a shop or station that performs maintenance, preventive maintenance, alterations, or
other functions affecting aircraft airworthiness. 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 instruction 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]

Section 121.379 Authority to perform and approve
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 alterations as provided in its continuous
airworthiness maintenance program
and its maintenance manual. In addition, 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 accordance with technical data approved by
the Administrator.
[Doc. No. 10289, 35 FR 16793, Oct. 30, 1970]

Section 121.380 Maintenance recording requirements.
(a) Each certificate holder shall keep
(using the system specified in the manual required in Section 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
Section 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, propeller, 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, including the times since the last inspections required by the inspection program 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 alterations to each airframe, engine, propeller, and appliance.
(b) A certificate holder need not
record the total time in service of an
engine or propeller on a transport category cargo airplane, a transport category airplane that has a passenger
seat configuration of more than 30
seats, or a nontransport category airplane 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 retain 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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