Federal Aviation Administration, DOT

Section 121.378

submit a report of investigation and
any necessary corrective action taken
to its responsible Flight Standards office.
(j) Engine condition monitoring. (1) The
certificate holder must have an engine
condition monitoring program to detect deterioration at an early stage and
to allow for corrective action before
safe operation is affected.
(2) This program must describe the
parameters to be monitored, the method of data collection, the method of
analyzing data, and the process for
taking corrective action.
(3) The program must ensure that engine-limit margins are maintained so
that a prolonged engine-inoperative diversion may be conducted at approved
power levels and in all expected environmental conditions without exceeding approved engine limits. This includes approved limits for items such
as rotor speeds and exhaust gas temperatures.
(k) Oil-consumption monitoring. The
certificate holder must have an engine
oil consumption monitoring program
to ensure that there is enough oil to
complete each ETOPS flight. APU oil
consumption must be included if an
APU is required for ETOPS. The operator-s oil consumption limit may not exceed the manufacturer-s recommendation. Monitoring must be continuous
and include oil added at each ETOPS
departure point. The program must
compare the amount of oil added at
each ETOPS departure point with the
running average consumption to identify sudden increases.
(l) APU in-flight start program. If the
airplane type certificate requires an
APU but does not require the APU to
run during the ETOPS portion of the
flight, the certificate holder must develop and maintain a program acceptable to the FAA for cold soak in-flight
start-and-run reliability.
(m) Maintenance training. For each
airplane-engine combination, the certificate holder must develop a maintenance training program that provides
training adequate to support ETOPS.
It must include ETOPS specific training for all persons involved in ETOPS
maintenance that focuses on the special nature of ETOPS. This training
must be in addition to the operator-s

maintenance training program used to
qualify individuals to perform work on
specific airplanes and engines.
(n) Configuration, maintenance, and
procedures (CMP) document. If an airplane-engine combination has a CMP
document, the certificate holder must
use a system that ensures compliance
with the applicable FAA-approved document.
(o) Procedural changes. Each substantial change to the maintenance or
training procedures that were used to
qualify the certificate holder for
ETOPS, must be submitted to the
CHDO for review. The certificate holder cannot implement a change until its
responsible Flight Standards office notifies the certificate holder that the review is complete.
[Doc. No. FAA-2002-6717, 72 FR 1880, Jan. 16,
2007, as amended by Amdt. 121-329, 72 FR
7348, Feb. 15, 2007; Amdt. 121-329, 72 FR 26541,
May 10, 2007; Amdt. 121-339, 73 FR 33881, June
16, 2008; Docket FAA-2018-0119, Amdt. 121-
380, 83 FR 9173, Mar. 5, 2018]

Section 121.375 Maintenance and preventive
maintenance training program.
Each certificate holder or 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 his duties.
Section 121.377 Maintenance and preventive
maintenance personnel duty time
limitations.
Within the United States, each certificate holder (or person performing
maintenance or preventive maintenance 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.
Section 121.378

Certificate requirements.

(a) Except for maintenance, preventive maintenance, alterations, and required inspections performed by a certificated repair station that is located

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