511 

Federal Aviation Administration, DOT 

§ 135.422 

inspections and correction or deferral 
of discrepancies including form and 
disposition of records. 

(e) After approval, the certificate 

holder shall include the approved air-
craft inspection program in the manual 
required by § 135.21. 

(f) Whenever the Administrator finds 

that revisions to an approved aircraft 
inspection program are necessary for 
the continued adequacy of the pro-
gram, the certificate holder shall, after 
notification by the Administrator, 
make any changes in the program 
found by the Administrator to be nec-
essary. The certificate holder may pe-
tition the Administrator to reconsider 
the notice to make any changes in a 
program. The petition must be filed 
with the representatives of the Admin-
istrator assigned to it within 30 days 
after the certificate holder receives the 
notice. Except in the case of an emer-
gency requiring immediate action in 
the interest of safety, the filing of the 
petition stays the notice pending a de-
cision by the Administrator. 

(g) Each certificate holder who has 

an approved aircraft inspection pro-
gram shall have each aircraft that is 
subject to the program inspected in ac-
cordance with the program. 

(h) The registration number of each 

aircraft that is subject to an approved 
aircraft inspection program must be in-
cluded in the operations specifications 
of the certificate holder. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–104, 71 FR 536, Jan. 4, 
2006] 

§ 135.421 Additional maintenance re-

quirements. 

(a) Each certificate holder who oper-

ates an aircraft type certificated for a 
passenger seating configuration, ex-
cluding any pilot seat, of nine seats or 
less, must comply with the manufac-
turer’s recommended maintenance pro-
grams, or a program approved by the 
Administrator, for each aircraft en-
gine, propeller, rotor, and each item of 
emergency equipment required by this 
chapter. 

(b) For the purpose of this section, a 

manufacturer’s maintenance program 
is one which is contained in the main-
tenance manual or maintenance in-
structions set forth by the manufac-

turer as required by this chapter for 
the aircraft, aircraft engine, propeller, 
rotor or item of emergency equipment. 

(c) For each single engine aircraft to 

be used in passenger-carrying IFR op-
erations, each certificate holder must 
incorporate into its maintenance pro-
gram either: 

(1) The manufacturer’s recommended 

engine trend monitoring program, 
which includes an oil analysis, if appro-
priate, or 

(2) An FAA approved engine trend 

monitoring program that includes an 
oil analysis at each 100 hour interval or 
at the manufacturer’s suggested inter-
val, whichever is more frequent. 

(d) For single engine aircraft to be 

used in passenger-carrying IFR oper-
ations, written maintenance instruc-
tions containing the methods, tech-
niques, and practices necessary to 
maintain the equipment specified in 
§§ 135.105, and 135.163 (f) and (h) are re-
quired. 

(e) No certificate holder may operate 

a single engine aircraft under IFR, car-
rying passengers, unless the certificate 
holder records and maintains in the en-
gine maintenance records the results of 
each test, observation, and inspection 
required by the applicable engine trend 
monitoring program specified in (c) (1) 
and (2) of this section. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–70, 62 FR 42374, Aug. 6, 
1997] 

§ 135.422 Aging airplane inspections 

and records reviews for multien-

gine airplanes certificated with 

nine or fewer passenger seats. 

(a) 

Applicability. 

This section applies 

to multiengine airplanes certificated 
with nine or fewer passenger seats, op-
erated by a certificate holder in a 
scheduled operation under this part, 
except for those airplanes operated by 
a certificate holder in a scheduled op-
eration between any point within the 
State of Alaska and any other point 
within the State of Alaska. 

(b) 

Operation after inspections and 

records review. 

After the dates specified 

in this paragraph, a certificate holder 
may not operate a multiengine air-
plane in a scheduled operation under 
this part unless the Administrator has 
notified the certificate holder that the