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374 

14 CFR Ch. I (1–1–24 Edition) 

§ 125.407 

(1) Identify in its operations manual 

the person having custody of the copies 
of documents retained in accordance 
with paragraph (d) of this section; and 

(2) Retain at its principal operations 

base either the original or a copy of the 
records required by this section for at 
least 30 days. 

§ 125.407 Maintenance log: Airplanes. 

(a) Each person who takes corrective 

action or defers action concerning a re-
ported or observed failure or malfunc-
tion of an airframe, aircraft engine, 
propeller, or appliance shall record the 
action taken in the airplane mainte-
nance log in accordance with part 43 of 
this chapter. 

(b) Each certificate holder shall es-

tablish a procedure for keeping copies 
of the airplane maintenance log re-
quired by this section in the airplane 
for access by appropriate personnel and 
shall include that procedure in the 
manual required by § 125.249. 

§ 125.409 Service difficulty reports. 

(a) Each certificate holder shall re-

port the occurrence or detection of 
each failure, malfunction, or defect, in 
a form and manner prescribed by the 
Administrator. 

(b) Each certificate holder shall sub-

mit each report required by this sec-
tion, covering each 24-hour period be-
ginning at 0900 local time of each day 
and ending at 0900 local time on the 
next day, to the FAA office in Okla-
homa City, Oklahoma. Each report of 
occurrences during a 24-hour period 
shall be submitted to the collection 
point within the next 96 hours. How-
ever, a report due on Saturday or Sun-
day may be submitted on the following 
Monday, and a report due on a holiday 
may be submitted on the next work 
day. 

[Doc. No. 19779, 45 FR 67235, Oct. 9, 1980, as 
amended by Amdt. 125–49, 70 FR 76979, Dec. 
29, 2005] 

§ 125.411 Airworthiness release or 

maintenance record entry. 

(a) No certificate holder may operate 

an airplane after maintenance, preven-
tive maintenance, or alteration is per-
formed on the airplane unless the per-
son performing that maintenance, pre-

ventive maintenance, or alteration pre-
pares or causes to be prepared— 

(1) An airworthiness release; or 
(2) An entry in the aircraft mainte-

nance records in accordance with the 
certificate holder’s manual. 

(b) The airworthiness release or 

maintenance record entry required by 
paragraph (a) of this section must— 

(1) Be prepared in accordance with 

the procedures set forth in the certifi-
cate holder’s manual; 

(2) Include a certification that— 
(i) The work was performed in ac-

cordance with the requirements of the 
certificate holder’s manual; 

(ii) All items required to be inspected 

were inspected by an authorized person 
who determined that the work was sat-
isfactorily completed; 

(iii) No known condition exists that 

would make the airplane unairworthy; 
and 

(iv) So far as the work performed is 

concerned, the airplane is in condition 
for safe operation; and 

(3) Be signed by a person authorized 

in part 43 of this chapter to perform 
maintenance, preventive maintenance, 
and alteration. 

(c) When an airworthiness release 

form is prepared, the certificate holder 
must give a copy to the pilot in com-
mand and keep a record of it for at 
least 60 days. 

(d) Instead of restating each of the 

conditions of the certification required 
by paragraph (b) of this section, the 
certificate holder may state in its 
manual that the signature of a person 
authorized in part 43 of this chapter 
constitutes that certification. 

Subpart M—Continued Airworthi-

ness and Safety Improve-
ments 

S

OURCE

: Amdt. 125–53, 72 FR 63412, Nov. 8, 

2007, unless otherwise noted. 

§ 125.501 Purpose and definition. 

(a) This subpart requires operators to 

support the continued airworthiness of 
each airplane. These requirements may 
include, but are not limited to, revising 
the inspection program, incorporating 
design changes, and incorporating revi-
sions to Instructions for Continued 
Airworthiness. 

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375 

Federal Aviation Administration, DOT 

§ 125.507 

(b) [Reserved] 

[Amdt. 125–53, 72 FR 63412, Nov. 8, 2007, as 
amended by Docket FAA–2018–0119, Amdt. 
125–68, 83 FR 9174, Mar. 5, 2018] 

§ 125.503 [Reserved] 

§ 125.505 Repairs assessment for pres-

surized fuselages. 

(a) No person may operate an Airbus 

Model A300 (excluding the –600 series), 
British Aerospace Model BAC 1–11, Boe-
ing Model 707, 720, 727, 737 or 747, 
McDonnell Douglas Model DC–8, DC–9/ 
MD–80 or DC–10, Fokker Model F28, or 
Lockheed Model L–1011 beyond the ap-
plicable flight cycle implementation 
time specified below, or May 25, 2001, 
whichever occurs later, unless oper-
ations specifications have been issued 
to reference repair assessment guide-
lines applicable to the fuselage pres-
sure boundary (fuselage skin, door 
skin, and bulkhead webs), and those 
guidelines are incorporated in its 
maintenance program. The repair as-
sessment guidelines must be approved 
by the responsible Aircraft Certifi-
cation Service office for the type cer-
tificate for the affected airplane. 

(1) For the Airbus Model A300 (ex-

cluding the –600 series), the flight cycle 
implementation time is: 

(i) Model B2: 36,000 flights. 
(ii) Model B4–100 (including Model 

B4–2C): 30,000 flights above the window 
line, and 36,000 flights below the win-
dow line. 

(iii) Model B4–200: 25,500 flights above 

the window line, and 34,000 flights 
below the window line. 

(2) For all models of the British Aero-

space BAC 1–11, the flight cycle imple-
mentation time is 60,000 flights. 

(3) For all models of the Boeing 707, 

the flight cycle implementation time is 
15,000 flights. 

(4) For all models of the Boeing 720, 

the flight cycle implementation time is 
23,000 flights. 

(5) For all models of the Boeing 727, 

the flight cycle implementation time is 
45,000 flights. 

(6) For all models of the Boeing 737, 

the flight cycle implementation time is 
60,000 flights. 

(7) For all models of the Boeing 747, 

the flight cycle implementation time is 
15,000 flights. 

(8) For all models of the McDonnell 

Douglas DC–8, the flight cycle imple-
mentation time is 30,000 flights. 

(9) For all models of the McDonnell 

Douglas DC–9/MD–80, the flight cycle 
implementation time is 60,000 flights. 

(10) For all models of the McDonnell 

Douglas DC–10, the flight cycle imple-
mentation time is 30,000 flights. 

(11) For all models of the Lockheed 

L–1011, the flight cycle implementation 
time is 27,000 flights. 

(12) For the Fokker F–28 Mark, 1000, 

2000, 3000, and 4000, the flight cycle im-
plementation time is 60,000 flights. 

(b) [Reserved] 

[Doc. No. 29104, 65 FR 24126, Apr. 25, 2000; 65 
FR 50744, Aug. 21, 2000, as amended by Amdt. 
125–36, 66 FR 23131, May 7, 2001; Amdt. 125–40, 
67 FR 72834, Dec. 9, 2002; Amdt. 125–46, 69 FR 
45942, July 30, 2004. Redesignated by Amdt. 
125–53, 72 FR 63412, Nov. 8, 2007; Docket FAA– 
2018–0119, Amdt. 125–68, 83 FR 9174, Mar. 5, 
2018] 

§ 125.507 Fuel tank system inspection 

program. 

(a) Except as provided in paragraph 

(g) of this section, this section applies 
to transport category, turbine-powered 
airplanes with a type certificate issued 
after January 1, 1958, that, as a result 
of original type certification or later 
increase in capacity, have— 

(1) A maximum type-certificated pas-

senger capacity of 30 or more, or 

(2) A maximum payload capacity of 

7500 pounds or more. 

(b) For each airplane on which an 

auxiliary fuel tank is installed under a 
field approval, before June 16, 2008, the 
certificate holder must submit to the 
responsible Aircraft Certification Serv-
ice office proposed maintenance in-
structions for the tank that meet the 
requirements of Special Federal Avia-
tion Regulation No. 88 (SFAR 88) of 
this chapter. 

(c) After December 16, 2008, no certifi-

cate holder may operate an airplane 
identified in paragraph (a) of this sec-
tion unless the inspection program for 
that airplane has been revised to in-
clude applicable inspections, proce-
dures, and limitations for fuel tank 
systems. 

(d) The proposed fuel tank system in-

spection program revisions must be 
based on fuel tank system Instructions 
for Continued Airworthiness (ICA) that