(e)
Look at the bearings. 1) Make sure there is no corrosion or damage.
(f)
Look at the top hinge mechanism. 1) Make sure the top hinge mechanism is clean. 2) Make sure there is no damage to the top hinge mechanism. 3) Make sure there are no missing fasteners.
(g)
Look at the bottom hinge mechanism. 1) Make sure the bottom hinge mechanism is clean. 2) Make sure there is no damage to the bottom hinge mechanism. 3) Make sure there are no missing fasteners.
S 416-013
(3) Install the lining on the door.
TASK 52-13-00-716-000
5. Operational Check of the Upper Deck Crew Service Door Carriage Mechanism
_________________________________________________________________________
A. General
(1)
This is a scheduled maintenance task.
B.
Access
(1)
Location Zone
224 Fwd Upper Deck, RH
(2)
Access Panel
847R Upper Deck Emergency Door, RH
C.
Procedure
(1)
Open the door but do not move it aft.
S 866-005
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A
747-400 MAINTENANCE MANUAL
S 866-001
(2)
Move the door aft to do a check of the carriage and track mechanism.
(a)
See that the hinge mechanisms operate to move the door inboard.
(b)
Feel that the door moves smoothly and freely.
(c)
See that the snubber does not allow the door to hit the structure.
(d)
See that the latch holds the door in the aft position.
S 866-002
(3) Release the manual latch handle.
S 866-006
CAUTION:_______DO NOT USE THE INTERIOR HANDLE TO MOVE THE DOOR FORWARD. THIS CAN CAUSE THE EXTERIOR HANDLES TO EXTEND WHICH WILL CAUSE DAMAGE TO THE AIRPLANE.
(4)
Move the door forward to do a check of the carriage and track mechanism.
(a)
Feel that the door moves freely and easily.
(b)
See that the snubber does not allow the door to hit the structure.
S 866-004
(5) Close and latch the door.
TASK 52-13-00-216-007
6. Visual Check of the Upper Deck Crew Service Door Carriage Mechanism____________________________________________________________________
A. General
(1)
This is a scheduled maintenance task.
B.
Access
(1)
Location Zone
224 Fwd Upper Deck, RH
(2)
Access Panel
847R Upper Deck Emergency Door, RH
C.
Procedure
S 216-014
(1)
Do a visual inspection of the carriage mechanism.
(a)
Look for damage.
(b)
Look for corrosion.
(c)
Look for missing fasteners.
S 216-015
(2)
Do a visual inspection of the snubbers.
(a)
Look for loose or missing fasteners.
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A 747-400 MAINTENANCE MANUAL
(b) Make sure the seals on the snubbers are in good condition.
(3) S 216-010Do a visual inspection of the track mechanism. (a) Make sure the track is clean and free of debris. (b) See that the there is no damage to the track supports.
(4) S 216-011Do a visual inspection of the pushrods, stop latches and pivot fittings. (a) Make sure there is no corrosion or damage. (b) Make sure there are no loose or missing fasteneres. (c) Make sure the parts are in satisfactory condition.
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