149 

Federal Aviation Administration, DOT 

§ 121.378 

submit a report of investigation and 
any necessary corrective action taken 
to its responsible Flight Standards of-
fice. 

(j) 

Engine condition monitoring. 

(1) The 

certificate holder must have an engine 
condition monitoring program to de-
tect 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 meth-
od of data collection, the method of 
analyzing data, and the process for 
taking corrective action. 

(3) The program must ensure that en-

gine-limit margins are maintained so 
that a prolonged engine-inoperative di-
version may be conducted at approved 
power levels and in all expected envi-
ronmental conditions without exceed-
ing approved engine limits. This in-
cludes approved limits for items such 
as rotor speeds and exhaust gas tem-
peratures. 

(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 opera-
tor’s oil consumption limit may not ex-
ceed the manufacturer’s recommenda-
tion. 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 iden-
tify 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 de-
velop and maintain a program accept-
able to the FAA for cold soak in-flight 
start-and-run reliability. 

(m) 

Maintenance training. 

For each 

airplane-engine combination, the cer-
tificate holder must develop a mainte-
nance training program that provides 
training adequate to support ETOPS. 
It must include ETOPS specific train-
ing for all persons involved in ETOPS 
maintenance that focuses on the spe-
cial 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 air-

plane-engine combination has a CMP 
document, the certificate holder must 
use a system that ensures compliance 
with the applicable FAA-approved doc-
ument. 

(o) 

Procedural changes. 

Each substan-

tial 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 hold-
er cannot implement a change until its 
responsible Flight Standards office no-
tifies the certificate holder that the re-
view 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] 

§ 121.375

Maintenance and preventive 

maintenance training program. 

Each certificate holder or person per-

forming 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 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 

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