Federal Aviation Administration, DOT Section 121.550 or other departments that are not directly related to flight operations, unless they are eligible under paragraph (a)(4) of this section. (c) No person may admit any person to the flight deck unless there is a seat available for his use in the passenger compartment, except - (1) An FAA air carrier inspector, a DOD commercial air carrier evaluator, or authorized representative of the Administrator or National Transportation Safety Board who is checking or observing flight operations; (2) An air traffic controller who is authorized by the Administrator to observe ATC procedures; (3) A certificated airman employed by the certificate holder whose duties require an airman certificate; (4) A certificated airman employed by another part 119 certificate holder whose duties with that part 119 certificate holder require an airman certificate and who is authorized by the part 119 certificate holder operating the aircraft to make specific trips over a route; (5) An employee of the part 119 certificate holder operating the aircraft whose duty is directly related to the conduct or planning of flight operations or the in-flight monitoring of aircraft equipment or operating procedures, if his presence on the flightdeck is necessary to perform his duties and he has been authorized in writing by a responsible supervisor, listed in the Operations Manual as having that authority; and (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 procedures, 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 department of the part 119 certificate holder, listed in the Operations Manual as having 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] Section 121.548 Aviation safety inspector-s credentials: Admission to pilot-s compartment. Whenever, in performing the duties of conducting an inspection, an inspector of the Federal Aviation Administration presents form FAA 110A, - Aviation Safety Inspector-s Credential, - to the pilot in command of an aircraft operated by a certificate holder, 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] Section 121.548a DOD Commercial Air Carrier Evaluator-s Credential. Whenever, in performing the duties of conducting an evaluation, a DOD commercial air carrier evaluator presents SSectionA Form 110B, - DOD Commercial Air Carrier Evaluator-s Credential, - to the pilot in command of an airplane operated by the certificate holder, the evaluator must be given free and uninterrupted access to the pilot-s compartment of that airplane. [Doc. No. FAA-2003-15571, 68 FR 41217, July 10, 2003] Section 121.549 Flying equipment. (a) The pilot in command shall ensure that appropriate aeronautical charts containing adequate information concerning navigation aids and instrument 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. Section 121.550 Secret Service Agents: Admission 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 considers 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 credentials to the pilot in command of the aircraft, be admitted to the flight deck 199 VerDate Sep<11>2014 08:20 May 17, 2019 Jkt 247048 PO 00000 Frm 00209 Fmt 8010 Sfmt 8010 Y:\SGML\247048.XXX 247048