40.238 Inspection and overhaul organization and procedures. Applicant shall show inspection and overhaul organization, procedures, and techniques adequate for the proper maintenance of all aircraft, engines, and equipment used.
40.24 Aircraft requirements: Visual-contact night operation.
Note.—Single-engine aircraft may not be used in night operation with passengers.
40.240 If Operation overland. Applicant shall show multi—engine land aircraft, which meet the flight performance requirements of § 40.233, and of a number necessary for safe operation as provided for in § 40.234.
40.241 If operation over water. Applicant shall show multi-engine land aircraft which meet the flight performance and equipment requirements of § 40.233, and of a number necessary for safe operation as provided for in § 40.234.
40.242 Number of aircraft. Same as in § 40.234.
40.243 Radio equipment. Same as in § 40.235.
40.244 Hangar facilities. Same as in § 40.236.
40.245 Shop facilities. Same as in § 40.237.
40.246 Inspection and overhaul organization and procedures. Same as in § 40.238.
40.25 Aircraft requirements: Instrument or over-the-top operation.
Note.—Single-engine aircraft may not be used in an instrument or over-the-top operation with passengers.
'40.250 If operation overland. Applicant shall show multi-engine aircraft of model and number necessary for safe operation. Applicant shall also show:
(a) That such aircraft (other than those specifically listed as in scheduled air carrier service by the applicant prior to January 1, 1935) to be used on the proposed route, or part thereof, are capable, with any one engine inoperative, of maintaining level flight, with authorized load for the route or part thereof, at an altitude equivalent to 1,000 feet above the highest part of the terrain on the proposed instrument course of the route, or part thereof; or
(b) Operating procedures, which, in the opinion of the Administrator, will assure that such aircraft will be capable of effecting a safe landing at an airport or other suitable area in the event of the failure of any one engine at any point on the route on which such aircraft will be operated.
40.2500 Engine rotation. On and after July 1, 1941, applicant shall show that any aircraft to be used in air transportation which have engines with maximum power ratings of 480 horse-power or more are so equipped that engine rotation may be promptly stopped during flight; and, on and after January 1, 1943, the same showing shall be made with respect to all other aircraft to be used in air transportation.
40.251 If operation over water. Same as in § 40.241.
40.252 Number of aircraft. Same as in § 40.234.
40.253 Radio equipment. Same as in § 40.235 and, in addition, applicant shall show that there is installed in each aircraft to be used in instrument or over-the-top operation (during day or night) over the proposed route, or part thereof, one additional separate type certificated radio receiving system capable of receiving radio range signals and weather broadcasts. Such receiver system shall normally operate from the main source of electrical supply of the aircraft but, in event of failure of the normal power source, shall be capable of being switched to operate from an independent power source. This system shall include an independent power source capable of operating such receiver continuously for a period of at least 4 hours. It is also required that such receiver operate from an independent antenna or from either of two antennas. Two sets of type certificated headphones and two type certificated microphones shall be carried in the aircraft at all times.
40.2530 Radio direction finder. Applicant shall show that there is installed in each aircraft a type certificated radio direction finder, covering at least the frequency range of 200 to 400 kilocycles. The design of the radio direction finder shall be such as to permit its regular operation in the taking of line bearings on any station to which the direction finder may be tuned without altering the course of the aircraft. The radio direction finder shall also be provided with means to eliminate, insofar as possible consistent with the advancement of the art, that type of interference, commonly known as rain, snow, sleet, or dust static. The radio direction finder shall provide means for audible reception of radio range and weather broadcast messages. It may be installed in lieu of the emergency receiver required in § 40.253 provided that an
