Federal Aviation Administration, DOT § 23.2550

§ 23.2520 High-intensity Radiated effects on the performance of Fields (HIRF) protection. flightcrew duties. (a) Each electrical and electronic (b) Any position and anti-collision systems that perform a function, the lights, if required by part 91 of this failure of which would prevent the con- chapter, must have the intensities, tinued safe flight and of the flash rate, colors, fields of coverage, airplane, must be designed and in- and other characteristics to provide stalled such that— sufficient time for another to avoid a collision. (1) The function at the airplane level (c) Any position lights, if required by is not adversely affected during and part 91 of this chapter, must include a after the time the airplane is exposed red light on the left side of the air- to the HIRF environment; and plane, a green light on the right side of (2) The system recovers normal oper- the airplane, spaced laterally as far ation of that function in a timely man- apart as practicable, and a white light ner after the airplane is exposed to the facing aft, located on an aft portion of HIRF environment, unless the system’s the airplane or on the wing tips. recovery conflicts with other oper- (d) Any taxi and landing lights must ational or functional requirements of be designed and installed so they pro- the system. vide sufficient light for night oper- (b) For airplanes approved for IFR ations. operations, each electrical and elec- (e) For seaplanes or amphibian air- tronic system that performs a func- planes, riding lights must provide a tion, the failure of which would signifi- white light visible in clear atmospheric cantly reduce the capability of the air- conditions. plane or the ability of the flightcrew to respond to an adverse operating condi- § 23.2535 Safety equipment. tion, must be designed and installed Safety and survival equipment, re- such that the system recovers normal quired by the operating rules of this operation of that function in a timely chapter, must be reliable, readily ac- manner after the airplane is exposed to cessible, easily identifiable, and clearly the HIRF environment. marked to identify its method of oper- ation. § 23.2525 System power generation, storage, and distribution. § 23.2540 Flight in icing conditions. The power generation, storage, and An applicant who requests certifi- distribution for any system must be de- cation for flight in icing conditions de- signed and installed to— fined in part 1 of appendix C to part 25 (a) Supply the power required for op- of this chapter, or an applicant who re- eration of connected loads during all quests certification for flight in these intended operating conditions; icing conditions and any additional at- (b) Ensure no single failure or mal- mospheric icing conditions, must show function of any one power supply, dis- the following in the icing conditions tribution system, or other utilization for which certification is requested: system will prevent the system from (a) The pro- supplying the essential loads required vides for safe operation. for continued safe flight and landing; (b) The airplane design must provide and protection from stalling when the (c) Have enough capacity, if the pri- is operating. mary source fails, to supply essential loads, including non-continuous essen- § 23.2545 Pressurized systems ele- tial loads for the time needed to com- ments. plete the function required for contin- Pressurized systems must withstand ued safe flight and landing. appropriate proof and burst pressures.

§ 23.2530 External and cockpit light- § 23.2550 Equipment containing high- ing. energy rotors. (a) The applicant must design and in- Equipment containing high-energy stall all lights to minimize any adverse rotors must be designed or installed to

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