area around the door seals 2) Damage to the seal retainers and deterioration of the sealant on the seal retainers
3) The loose fasteners, clearance at the fasteners, and cracks or other damage to the structure around the opening of the door.
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A 747-400 MAINTENANCE MANUAL
A
A
A SEE A UP INBD
A GATE
STOP PAD (ON THE FUSELAGE STRUCTURE)
AREA CORROSION
A-A (LOWER GATE SHOWN) STOP MUST TOUCH IN THIS THE CENTER OF THE DOOR 0.30-INCH DIAMETER AREA
Figure 602 A Main Entry Door Number No. 5 Inspection
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A
747-400 MAINTENANCE MANUAL
(d)
Look at the guide plates and roller pin for damage that can cause a problem in the door.
(e)
Look for damage to the flexible conduit for the wire bundle.
(f)
Make sure the stop pins on the door align with the stop pads (Fig. 602).
NOTE: Usual flight and pressure loads cause the stop pins to
____ make marks on the stop pads.
(g) Make sure the wear pads for the stop pins on the lower gate are not worn more than 0.035 inch.
S 226-027
(7)
Make sure the contour and clearance of the door is correct (AMM 52-11-01/501).
S 226-028
(8)
Make sure the roller bearing on the guide arm is installed correctly in its housing (AMM 52-11-04/401).
S 416-024
(9)
Install the door maintenance access panel, forward of the door.
S 416-025
(10)
Install the lining on the door (AMM 52-11-02/401).
TASK 52-11-09-206-041
3. Main Entry Door 5 Upper and Lower Gates Inspection
__________________________________________________
A. General
(1)
This is a scheduled maintenance task.
B.
Access
(1)
Location Zone
271 Main Deck, Sta 2040 to 2360, LH
(2)
Access Panel 271AL Panel, Access - Door Maintenance (Door 5, LH) 835L Door - No. 5 Main Entry, LH
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A
747-400 MAINTENANCE MANUAL
C. Procedure
S 866-036
(1)
Make sure the mode selector lever is in the MANUAL position.
S 016-038
(2)
Open the door.
(a)
Look at the lower surface of lower gate, and the top surface of the upper gate for corrosion (Section A-A, Fig. 602).
(b)
Make sure the wear pads for the stop pins on the lower gate are not worn more than 0.035 inch.
TASK 52-11-09-206-042
4. Main Entry Door 5 Internal and External Handle Mechanism Inspection___________________________________________________________________
A. General
(1)
This is a scheduled maintenance task.
B.
References
(1)
AMM 52-11-02/401, Main Entry Door Lining and Insulation
C.
Access
(1)
Location Zone
271 Main Deck, Sta 2040 to 2360, LH
(2)
Access Panel 271AL Panel, Access - Door Maintenance (Door 5, LH) 835L Door - No. 5 Main Entry, LH
D.
Procedure
S 016-032
(1)
Open the door.
S 016-033
(2)
Remove the lining from the door (AMM 52-11-02/401).
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