Fuselage doors.

CFR · 2024-01-01 · US · Title 14

(a) (1) Each door must have means to safeguard against opening in flight as a result of mechanical failure, or failure of any single structural element. (2) Each door that could be a hazard if it unlatches must be designed so that unlatching during pressurized and unpressurized flight from the fully closed, latched, and locked condition is extremely improbable. This must be shown by safety analysis. (3) Each element of each door operating system must be designed or, where impracticable, distinctively and permanently marked, to minimize the probability of incorrect assembly and adjustment that could result in a malfunction. (4) All sources of power that could initiate unlocking or unlatching of any door must be automatically isolated from the latching and locking systems prior to flight and it must not be possible to restore power to the door during flight. (5) Each removable bolt, screw, nut, pin, or other removable fastener must meet the locking requirements of § 25.607. (6) Certain doors, as specified by § 25.807(h), must also meet the applicable requirements of §§ 25.809 through 25.812 for emergency exits. (b) (1) No single failure will prevent more than one exit from being opened; and (2) Failures that would prevent opening of the exit after landing are improbable. (c) (1) The provision must be designed to function after any single failure, or after any combination of failures not shown to be extremely improbable. (2) Doors that meet the conditions described in paragraph

official document · source cfr-2024 · id 14:§ 25.783