Cabin Entrance Door Installation - Piper Cheyenne IIIA Airplane Maintenance Manual

PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
Doors
A. Cabin Entrance Door
CHART 1
FAULT ISOLATION (DOOR SEAL CIRCUIT)
Fault Cause
Cabin door unsafe light
will not go out.
Door switch sticking in
the open position.
Remedy
Lubricate the mechanical
parts sparingly with Glide
Air or equivalent.
Switch or switches in door
frame out of adjustment
Short to ground.
Adjust switches.
Check wiring and repair.
Cabin door unsafe light
will not come on.
Broken wire or loose
connection.
Check and repair wiring.
1. Cabin Entrance Door Removal (Figure 401)
(a) Place a padded support under the door to relieve tension from the two support cables.
(b) Remove scuff cover from over the door hinge.
(c) Remove boot over the door snubber attachment point on door. Disconnect snubber if installed.
(Refer to Paragraph Cabin Door Snubber.)
(d) Disconnect two support cables from door.
(e) Disconnect pressure line to door seal.
(f) Remove hinge pin and lift door to separate hinges. Remove door from airplane.
2. Cabin Entrance Door Installation (Figure 401)
(a) Place a padded support under door.
(b) Position hinge half on the door and half on the airplane. Install hinge pin.
(c) Connect two support cables to door.
(d) Connect pressure line to door seal.
(e) Connect door snubber and replace boot, if installed.
(f) Install scuff cover over door hinge.
(g) Remove padded support from under door. Check door fit.
3. Cabin Entrance Door Inspection
(a) Make a visual inspection of parts for excessive wear, metal fatigue, and signs of improper
adjustments.
(b) Operate door latch mechanism. Check for proper functioning of all locking lugs and for signs of
binding.
(c) Refer to paragraphs for repair and service instructions of various door components.
(d) Refer to 12-20-00 for proper lubrication of door and related mechanisms.
EFFECTIVITY: