280
14 CFR Ch. I (1–1–24 Edition)
§ 25.781
Controls
Motion and effect
Flaps (or auxiliary lift
devices).
Forward for flaps up; rearward for
flaps down.
Trim tabs (or equiva-
lent).
Rotate to produce similar rotation of
the airplane about an axis parallel
to the axis of the control.
(b) Powerplant and auxiliary con-
trols:
(1)
Powerplant.
Controls
Motion and effect
Power or thrust ............
Forward to increase forward thrust
and rearward to increase rear-
ward thrust.
Propellers ....................
Forward to increase rpm.
Mixture .........................
Forward or upward for rich.
Controls
Motion and effect
Carburetor air heat ......
Forward or upward for cold.
Supercharger ...............
Forward or upward for low blower.
For turbosuperchargers, forward,
upward, or clockwise, to increase
pressure.
(2)
Auxiliary.
Controls
Motion and effect
Landing gear ...............
Down to extend.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25–72, 55 FR 29778, July 20,
1990]
§ 25.781
Cockpit control knob shape.
Cockpit control knobs must conform to the general shapes (but not necessarily
the exact sizes or specific proportions) in the following figure:
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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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