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14 CFR Ch. I (1–1–19 Edition) 

§ 121.707 

(c) The number of propeller 

featherings in flight, listed by type of 
propeller and engine and aircraft on 
which it was installed. Propeller 
featherings for training, demonstra-
tion, or flight check purposes need not 
be reported. 

[Doc. No. 6258, 29 FR 19226, Dec. 31, 1964, as 
amended by Amdt. 121–10, 30 FR 10025, Aug. 
12, 1965; Amdt. 121–319, 70 FR 76979, Dec. 29, 

§ 121.707

Alteration and repair re-


(a) Each certificate holder shall, 

promptly upon its completion, prepare 
a report of each major alteration or 
major repair of an airframe, aircraft 
engine, propeller, or appliance of an 
aircraft operated by it. 

(b) The certificate holder shall sub-

mit a copy of each report of a major al-
teration to, and shall keep a copy of 
each report of a major repair available 
for inspection by, the representative of 
the Administrator who is assigned to 

§ 121.709

Airworthiness release or air-

craft log entry. 

(a) No certificate holder may operate 

an aircraft after maintenance, preven-
tive maintenance or alterations are 
performed on the aircraft unless the 
certificate holder, or the person with 
whom the certificate holder arranges 
for the performance of the mainte-
nance, preventive maintenance, or al-
terations, prepares or causes to be pre-

(1) An airworthiness release; or 
(2) An appropriate entry in the air-

craft log. 

(b) The airworthiness release or log 

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; 

(iv) So far as the work performed is 

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

(3) Be signed by an authorized certifi-

cated mechanic or repairman except 
that a certificated repairman may sign 
the release or entry only for the work 
for which he is employed and certifi-

(c) Notwithstanding paragraph (b)(3) 

of this section, after maintenance, pre-
ventive maintenance, or alterations 
performed by a repair station that is 
located outside the United States, the 
airworthiness release or log entry re-
quired by paragraph (a) of this section 
may be signed by a person authorized 
by that repair station. 

(d) When an airworthiness release 

form is prepared the certificate holder 
must give a copy to the pilot in com-
mand and must keep a record thereof 
for at least 2 months. 

(e) Instead of restating each of the 

conditions of the certification required 
by paragraph (b) of this section, the air 
carrier may state in its manual that 
the signature of an authorized certifi-
cated mechanic or repairman con-
stitutes that certification. 

[Doc. No. 6258, 29 FR 19226, Dec. 31, 1964, as 
amended by Amdt. 121–6, 30 FR 6432, May 8, 
1965; Amdt. 121–21, 31 FR 10613, Aug. 9, 1966; 
Amdt. 121–286, 66 FR 41116, Aug. 6, 2001] 

§ 121.711

Communication records: Do-

mestic and flag operations. 

(a) Each certificate holder con-

ducting domestic or flag operations 
must record each en route communica-
tion between the certificate holder and 
its pilots using a communication sys-
tem as required by § 121.99 of this part. 

(b) For purposes of this section the 

term en route means from the time the 
aircraft pushes back from the depart-
ing gate until the time the aircraft 
reaches the arrival gate at its destina-

(c) The record required in paragraph 

(a) of this section must contain at least 
the following information: 

(1) The date and time of the contact; 
(2) The flight number; 
(3) Aircraft registration number; 

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