441 

Federal Aviation Administration, DOT 

§ 25.783 

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25–72, 55 FR 29779, July 20, 1990] 

§ 25.783

Fuselage doors. 

(a) 

General. This section applies to fu-

selage doors, which includes all doors, 
hatches, openable windows, access pan-
els, covers, etc., on the exterior of the 
fuselage that do not require the use of 
tools to open or close. This also applies 
to each door or hatch through a pres-
sure bulkhead, including any bulkhead 
that is specifically designed to func-

tion as a secondary bulkhead under the 
prescribed failure conditions of part 25. 
These doors must meet the require-
ments of this section, taking into ac-
count both pressurized and unpres-
surized flight, and must be designed as 
follows: 

(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. 

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