214 

14 CFR Ch. I (1–1–24 Edition) 

§ 121.548 

(6) A technical representative of the 

manufacturer of the aircraft or its 
components whose duties are directly 
related to the in-flight monitoring of 
aircraft equipment or operating proce-
dures, if his presence on the flightdeck 
is necessary to perform his duties and 
he has been authorized in writing by 
the Administrator and by a responsible 
supervisor of the operations depart-
ment of the part 119 certificate holder, 
listed in the Operations Manual as hav-
ing that authority. 

[Doc. No. 6258, 29 FR 19220, Dec. 31, 1964, as 
amended by Doc. No. 8084, 32 FR 5769, Apr. 11, 
1967; Amdt. 121–253, 61 FR 2613, Jan. 26, 1996; 
Amdt. 121–288, 67 FR 2127, Jan. 15, 2002; Amdt. 
121–298, 68 FR 41217, July 10, 2003] 

§ 121.548 Aviation safety inspector’s 

credentials: Admission to pilot’s 

compartment. 

Whenever, in performing the duties 

of conducting an inspection, an inspec-
tor of the Federal Aviation Adminis-
tration presents form FAA 110A, 
‘‘Aviation Safety Inspector’s Creden-
tial,’’ to the pilot in command of an 
aircraft operated by a certificate hold-
er, the inspector must be given free and 
uninterrupted access to the pilot’s 
compartment of that aircraft. 

[Doc. No. 28154, 61 FR 2613, Jan. 26, 1996] 

§ 121.548a DOD Commercial Air Car-

rier Evaluator’s Credential. 

Whenever, in performing the duties 

of conducting an evaluation, a DOD 
commercial air carrier evaluator pre-
sents S&A Form 110B, ‘‘DOD Commer-
cial Air Carrier Evaluator’s Creden-
tial,’’ to the pilot in command of an 
airplane operated by the certificate 
holder, the evaluator must be given 
free and uninterrupted access to the pi-
lot’s compartment of that airplane. 

[Doc. No. FAA–2003–15571, 68 FR 41217, July 
10, 2003] 

§ 121.549 Flying equipment. 

(a) The pilot in command shall en-

sure that appropriate aeronautical 
charts containing adequate informa-
tion concerning navigation aids and in-
strument approach procedures are 
aboard the aircraft for each flight. 

(b) Each crewmember shall, on each 

flight, have readily available for his 

use a flashlight that is in good working 
order. 

§ 121.550 Secret Service Agents: Admis-

sion to flight deck. 

Whenever an Agent of the Secret 

Service who is assigned the duty of 
protecting a person aboard an aircraft 
operated by a certificate holder con-
siders it necessary in the performance 
of his duty to ride on the flight deck of 
the aircraft, he must, upon request and 
presentation of his Secret Service cre-
dentials to the pilot in command of the 
aircraft, be admitted to the flight deck 
and permitted to occupy an observer 
seat thereon. 

[Doc. No. 9031, 35 FR 12061, July 28, 1970, as 
amended by Amdt. 121–253, 61 FR 2613, Jan. 
26, 1996] 

§ 121.551 Restriction or suspension of 

operation: Domestic and flag oper-
ations. 

When a certificate holder conducting 

domestic or flag operations knows of 
conditions, including airport and run-
way conditions, that are a hazard to 
safe operations, it shall restrict or sus-
pend operations until those conditions 
are corrected. 

[Doc. No. 28154, 61 FR 2613, Jan. 26, 1996] 

§ 121.553 Restriction or suspension of 

operation: Supplemental oper-
ations. 

When a certificate holder conducting 

supplemental operations or pilot in 
command knows of conditions, includ-
ing airport and runway conditions, 
that are a hazard to safe operations, 
the certificate holder or pilot in com-
mand, as the case may be, shall re-
strict or suspend operations until those 
conditions are corrected. 

[Doc. No. 28154, 61 FR 2613, Jan. 26, 1996] 

§ 121.555 Compliance with approved 

routes and limitations: Domestic 
and flag operations. 

No pilot may operate an airplane in 

scheduled air transportation— 

(a) Over any route or route segment 

unless it is specified in the certificate 
holder’s operations specifications; or