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14 CFR Ch. I (1–1–24 Edition)
§ 121.377
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 his du-
ties.
§ 121.377 Maintenance and preventive
maintenance personnel duty time
limitations.
Within the United States, each cer-
tificate holder (or person performing
maintenance or preventive mainte-
nance functions for it) shall relieve
each person performing maintenance
or preventive maintenance from duty
for a period of at least 24 consecutive
hours during any seven consecutive
days, or the equivalent thereof within
any one calendar month.
§ 121.378 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 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
