General.

CFR · 2024-01-01 · US · Title 14

(a) (1) Be determined by an electrical load analysis; and (2) Meet the requirements of § 29.1309. (b) (1) Power sources function properly when independent and when connected in combination; (2) No failure or malfunction of any power source can create a hazard or impair the ability of remaining sources to supply essential loads; (3) The system voltage and frequency (as applicable) at the terminals of essential load equipment can be maintained within the limits for which the equipment is designed, during any probable operating condition; (4) System transients due to switching, fault clearing, or other causes do not make essential loads inoperative, and do not cause a smoke or fire hazard; (5) There are means accessible in flight to appropriate crewmembers for the individual and collective disconnection of the electrical power sources from the main bus; and (6) There are means to indicate to appropriate crewmembers the generating system quantities essential for the safe operation of the system, such as the voltage and current supplied by each generator. (c) (d) Operation with the normal electrical power generating system inoperative. (1) It must be shown by analysis, tests, or both, that the rotorcraft can be operated safely in VFR conditions for a period of not less than 5 minutes, with the normal electrical power generating system (electrical power sources excluding the battery) inoperative, with critical type fuel (from the standpoint of flameout and restart capability), and

official document · source cfr-2024 · id 14:§ 29.1351