(b)  
P715 Aux/Ext No. 2 Power Center
 1) SIDE CARGO DOOR PWR

 S 714-012
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR AND
_______ THE DOOR OPENING WHEN YOU OPERATE THE DOOR. FAILURE OF THE LIFT MECHANISM COULD CAUSE THE DOOR TO CLOSE QUICKLY WHICH COULD CAUSE INJURY OR DAMAGE.
 (5)  
Open the door electrically to make sure the power unit operates correctly (Ref 52-32-00/001).

 (6)  
Close the door (Ref 52-32-00/001).

 (7)  
Install the insulation you moved for access (Ref 25-21-04/401).

 S 414-016
 S 864-015
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 ROTARY ACTUATOR AND ACTUATOR ARM - REMOVAL/INSTALLATION
_______________________________________________________
 1.  General_______
 A.  This procedure contains four tasks:
 (1)  
The removal of the rotary actuator

 (2)  
The installation of the rotary actuator

 (3)  
The removal of the actuator arm

 (4)  
The installation of the actuator arm.

 B.  
There are two rotary actuators and an actuator arm on each top corner of the door. The actuator arm is between the two rotary actuators. Splines connect the actuator arm to the rotary actuators. A quill shaft connects the rotary actuators to each other. A torque tube connects the rotary actuators to the lift mechanism.

 C.  
The four rotary actuators all hold the same load. If one actuator does not operate correctly, its load will be put on the other three actuators. This may cause damage to these actuators. Thus, if you replace an actuator because it does not operate, you must replace all four actuators.

 D.  
Rotary actuators with different part numbers are not identical. Do not put two actuators with different part numbers together on the same door.

 TASK 52-32-03-004-001
 2.  Remove the Rotary Actuator (Fig. 401)__________________________
 A.  References
 (1)  
25-21-04/401, Sidewall and Ceiling Insulation

 (2)  
IPC 52-32-02 Fig 1

 (3)  
SSM 52-32-01

 (4)  
WDM 52-32-11, 52-32-12

 B.  
Access

 (1)  
Location Zone
 261 Main Deck STA 1720 To STA 2040

 (2)  
Access Panels
 836L Door - Main Deck Cargo

 C.  
Procedure

 S 864-002
 (1)  
Open these circuit breakers:

 (a)  
On the P415 Power Distribution Center - Right 1) 415F17 SIDE CARGO DOOR CONT

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

SEE A
BOLT ROTARY
(7 LOCATIONS) ACTUATOR
DOWNSTOP PLATE
DOOR DOWN SWITCH A
SEE D
INPUT
SHAFT

ACTUATOR
ARM
DRAIN

SEE BSEE E
TORQUE SEE C A TUBE TORQUE TUBE
ACTUATOR LINK
BOLT (8 LOCATIONS)COUPLING
SIDE CARGO FWD
DOOR
FWD

ROTARY ACTUATOR
A B
Rotary Actuator and Actuator Arm Installation Figure 401 (Sheet 1)
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A 747-400 MAINTENANCE MANUAL
SLIP
ACTUATOR
JOINT
LINK

ROD END SHOULDER
0.071
INCH

Figure 401 (Sheet 2)
　
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