TM 55-1510-220-10
Figure 2-2. General Interior Arrangement (Sheet 2 of 2)
2-9.
ENTRANCE AND EXIT PROVISIONS.
NOTE
Two keys are provided in the
loose tools and equipment bag.
Both keys will fit the locks on the
cabin door, emergency hatch,
tailcone access door and the right
and
left
nose
avionics
compartment doors.
a.
Cabin Door.
CAUTION
Structural damage may be caused
if more than one person is on the
cabin door at a time. The door is
limited to a maximum of 300
pounds.
A swing-down door (fig. 2-9), hinged at the
bottom, provides a stairway for normal and emergency
entrance and exit. Two of the steps are movable and
fold flat against the door in the closed position. A step
folds down over the door
sill when the door opens to provide a platform (step) for
door seal protection. A plastic encased cable provides
support for the door in the open position, a handhold,
and a convenience for closing the door from inside. A
hydraulic damper permits the door to lower gradually
during opening. A rubber seal around the door seals the
pressure vessel while the aircraft is in flight. The door
locking mechanism is operated by either of the two
mechanically interconnected handles, one inside and
the other outside the door. When either handle is
rotated, three rotating cam-type latches on either side of
the door capture posts mounted on the cargo door. In
the closed position, the door becomes an integral part of
the cargo door. A button adjacent to the door handle
must be depressed before the handle can be rotated to
open the door. A bellows behind the button is inflated
when the aircraft is pressurized to prevent accidental
unlatching and/or opening of the door. A small round
window just above the second step permits observation
of the pressurization safety bellows. A placard adjacent
to the window instructs the operator that the safety lock
arm is in position around the bellows shaft which
indicates a properly locked door. Pushing the red button
adjacent to the window will illuminate the
Change 2 2-9
