(12)
Using switch No. 1, open main cargo door a minimum of 10 inches. Check that door-unlocked light illuminates.

(13)
Reconnect wire to terminal 10 and terminal 11 of terminal strip T259. Actuate door position switch on doorsill, lockpin switch at No. 3 door latch, and lockpin switch at No. 6 door latch. Check that main cargo door warning light extinguishes and that lights at No. 2 and 7 latch viewing windows are illuminated.

(14)
Release No. 3 door latch lockpin switch. Check that light at No. 2 latch viewing window extinguishes, that light at No. 7 latch viewing window remains illuminated, and that main cargo door warning light illuminates.

(15)
Actuate No. 3 door latch lockpin switch and release No. 6 door latch lockpin switch. Check that light at No. 7 latch viewing window is extinguished, that light at No. 2 latch viewing window is illuminated, and that main cargo door warning light is illuminated.

(16)
Actuate No. 6 door latch lockpin switch. Check that main cargo door warning light extinguishes.

(17)
Release door position switch. Check that main cargo door warning light illuminates.

(18)
Release No. 3 and 6 door latch lockpin switches, close door and lock handle. Check that door-unlocked light and main cargo door warning light are extinguished, and that lights at No. 2 and 7 latch viewing windows are illuminated.

(19)
Unlock door. Check that door-unlocked light and main cargo door warning light are illuminated, and that lights at No. 2 and 7 latch viewing windows are extinguished.

(20)
Operate switch No. 1 to UP TO CANOPY. Check that door raises to canopy position (approximately 87 degrees).

(21)
Operate switch No. 2 to DOWN TO CANOPY. Check that door does not move.

(22)
Operate switch No. 2 to FULL OPEN. Check that door raises to full open position (slightly overcenter of hinge line).

(23)
Operate switch No. 2 to DOWN TO CANOPY and release switch before canopy position is reached. Check that door stops.

(24)
Operate switch No. 2 to DOWN TO CANOPY. Check that door lowers to canopy position and stops. 

(25)
Operate switch No. 1 to CLOSE. Check that door closes and latches.

(26)
Lock main cargo door; check that door-unlocked light extinguishes.

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570 
Aug 01/94  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-32-0 Page 503 

D.  Return Airplane to Normal
(1)  
Close lift actuator access door.

(2)  
Install window and dado panels (Ref 52-32-81).

(3)  
Depressurize hydraulic system B (Ref Chapter 29).

(4)  
Determine whether there is any further need for electrical power on the airplane; if not, remove electrical power.

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MAIN CARGO DOOR ASSEMBLY - REMOVAL/INSTALLATION
1.  General
A.  This procedure covers removal and installation of a cargo door that has been previously
trimmed and fitted to the airplane.
Equipment and Materials

A.  Lifting Device for Main Cargo Door
(1)  
Cargo Door Sling - SYME 65-54916 or

(2)  
Lifting Fixture Assembly - Main Cargo Door, 7 Window - F70250-3 (preferred for future procurement)

B.  Solvent - BMS 3-2 
C.  Overhead Crane - 1100-pound minimum capacity
D.  Suitable container for catching hydraulic fluid
E.  Bolts - NAS 1304-7 (8 required)
F.  Personnel Safety Barrier, Cargo Door - F70258-1 
G.  Lubricant - MIL-G-21164 (Ref 20-30-21)
3.  Prepare for Removal
A.  Remove cargo door ceiling panels (Ref 52-32-81).
B.  On airplanes without New Look Interior, secure hatrack in folded position. On airplanes with New Look Interior, remove overhead stowage compartment (Ref Chapter 25, Equipment and Furnishings).
C.  Open lift actuator access door.
D.  Open cargo door to the angle at which door will hang when suspended by sling (View 1,  Fig. 401).
E.  With overhead crane, position sling over center of gravity of door.
511 
Jan 20/83  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  52-32-11 Page 401 

Main Cargo Door Lifting Device Installation  511 
52-32-11  Figure 401  Nov 1/74 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 
　
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