232 

14 CFR Ch. I (1–1–19 Edition) 

§§ 121.698–121.699 

(d) If a flight originates at a place 

other than the certificate holder’s prin-
cipal base of operations, and there is at 
that place a person to manage the 
flight departure for the certificate 
holder who does not himself or herself 
depart on the airplane, signed copies of 
the documents listed in paragraph (a) 
of this section may be retained at that 
place for not more than 30 days before 
being sent to the certificate holder’s 
principal base of operations. However, 
the documents for a particular flight 
need not be further retained at that 
place or be sent to the principal base of 
operations, if the originals or other 
copies of them have been previously re-
turned to the principal base of oper-
ations. 

(e) The certificate holder conducting 

supplemental operations shall: 

(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 base of op-

erations either an original or a copy of 
the records required by this section for 
at least three months. 

[Doc. No. 6258, 29 FR 19226, Dec. 31, 1964, as 
amended by Amdt. 121–123, 40 FR 44541, Sept. 
29, 1975; Amdt. 121–143, 43 FR 22642, May 25, 
1978; Amdt. 121–178, 47 FR 13316, Mar. 29, 1982; 
Amdt. 121–253, 61 FR 2616, Jan. 26, 1996] 

§§ 121.698–121.699

[Reserved] 

§ 121.701

Maintenance log: Aircraft. 

(a) Each person who takes action in 

the case of a reported or observed fail-
ure or malfunction of an airframe, en-
gine, propeller, or appliance that is 
critical to the safety of flight shall 
make, or have made, a record of that 
action in the airplane’s maintenance 
log. 

(b) Each certificate holder shall have 

an approved procedure for keeping ade-
quate copies of the record required in 
paragraph (a) of this section in the air-
plane in a place readily accessible to 
each flight crewmember and shall put 
that procedure in the certificate hold-
er’s manual. 

§ 121.703

Service difficulty reports. 

(a) Each certificate holder shall re-

port the occurrence or detection of 

each failure, malfunction, or defect 
concerning— 

(1) Fires during flight and whether 

the related fire-warning system func-
tioned properly; 

(2) Fires during flight not protected 

by a related fire-warning system; 

(3) False fire warning during flight; 
(4) An engine exhaust system that 

causes damage during flight to the en-
gine, adjacent structure, equipment, or 
components; 

(5) An aircraft component that 

causes accumulation or circulation of 
smoke, vapor, or toxic or noxious 
fumes in the crew compartment or pas-
senger cabin during flight; 

(6) Engine shutdown during flight be-

cause of flameout; 

(7) Engine shutdown during flight 

when external damage to the engine or 
airplane structure occurs; 

(8) Engine shutdown during flight due 

to foreign object ingestion or icing; 

(9) Engine shutdown during flight of 

more than one engine; 

(10) A propeller feathering system or 

ability of the system to control over-
speed during flight; 

(11) A fuel or fuel-dumping system 

that affects fuel flow or causes haz-
ardous leakage during flight; 

(12) An unwanted landing gear exten-

sion or retraction, or an unwanted 
opening or closing of landing gear 
doors during flight; 

(13) Brake system components that 

result in loss of brake actuating force 
when the airplane is in motion on the 
ground; 

(14) Aircraft structure that requires 

major repair; 

(15) Cracks, permanent deformation, 

or corrosion of aircraft structures, if 
more than the maximum acceptable to 
the manufacturer or the FAA; 

(16) Aircraft components or systems 

that result in taking emergency ac-
tions during flight (except action to 
shut down an engine); and 

(17) Emergency evacuation systems 

or components including all exit doors, 
passenger emergency evacuation light-
ing systems, or evacuation equipment 
that are found defective, or that fail to 
perform the intended functions during 
an actual emergency or during train-
ing, testing, maintenance, demonstra-
tions, or inadvertent deployments. 

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