(c)  
On the Nose Cargo Door Power panel H122:
 1) 122XX, DOOR LIFT
 2) 122XX, PULL UP CAM

 S 864-013
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747-400 MAINTENANCE MANUAL
 3) 122XX, LATCHES 1-4R
 4) 122XX, LATCHES 1-4L
 5) 122XX, LATCHES 5-8R
 6) 122XX, LATCHES 5-8L

 S 214-015
 (7)  
Operate the nose cargo door until the push-pull cam is in the fully open position as shown in Detail B.

 S 214-016

 (8)
Make sure the push-pull cam touches the cam rollers (Detail B).

 S 864-017

 (9)  
Open this circuit breaker and attach the DO-NOT-CLOSE tags:

 (a)  
On the Nose Cargo Door Power panel H122:
 1) 122XX, PULL UP CAM

 S 864-018
 (10)
 Hold the door control switch in the CLOSE position until the drive unit motor stops running.

 S 834-019

 (11)
 Make sure you can install ND-2 rig pin freely through the rig pin hole on the linear actuator (Detail C).

 S 824-030

 (12)
 If you cannot install the rig pin ND-2 freely through the rig pin hole on the linear actuator, do this step to adjust the linear actuator length:

 (a)  
Manually adjust the actuator length through the manual drive port until you can install ND-2 rig pin freely through the rig pin hole on actuator (Detail C).

 S 434-011
 (13)
 Connect the two flexible drive shafts on the drive unit with bolts, washers and nuts (Detail A).

 S 834-021

 (14)
 Remove rig pin ND-2.

 G.
Drive Unit Test

 S 864-022
 (1)  
Close this circuit breaker and attach the DO-NOT-OPEN tags:

 (a)  
On the Nose Cargo Door Power panel H122:
 1) 122XX, PULL UP CAM

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 S 864-023
 (2)  
Open the nose cargo door to the fully open position.

 S 214-024

 (3)  
Make sure the DOOR UP light on panel H121 comes on.

 S 864-025

 (4)  
Hold the door control switch in the OPEN position and make sure the door does not move.

 S 864-026

 (5)
Close the nose cargo door to the fully closed and latched position.

 S 224-027

 (6)
Make sure the aft end of linear actuator shaft makes an overlap

 0.25 to 0.75 inch on the inspection hole (Detail C).
 S 214-028
 (7)  
Make sure that all the lights for the nose cargo door on the control panels go off.

 H.
Put the Airplane Back To Its Usual Condition

 (1)
Remove electrical power, if it is not necessary (Ref 24-22-00/201).

 S 864-029
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747-400 MAINTENANCE MANUAL
 NOSE CARGO DOOR FLEXIBLE DRIVE SHAFT - REMOVAL/INSTALLATION
___________________________________________________________
 1.  General_______
 A. This procedure has two tasks:
 (1)  
The removal of the flexible drive shaft on the nose cargo door

 (2)  
The installation of the flexible drive shaft on the nose cargo door

 TASK 52-31-04-004-001
　
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