SEE A
ELECTRICAL WIRING
MANUAL DRIVE INPUT
LATCH ACTUATOR
LATCH ACTUATOR ATTACHMENT BOLT (QTY 2)
FILLER
BLOCK
LATCH
FITTING

POSITION
INDICATION
SWITCH
ASSEMBLY

FWD
TYPICAL LATCH ACTUATOR INSTALLATION A
Nose Door Cargo Latch Actuator Installation Figure 401
B26907
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A

747-400 MAINTENANCE MANUAL
CONTROL PANEL
SIDE LINING WINDOW PANEL
RAIN GUTTER
SEE A
INSULATION
FASTENER (6 LOCATIONS)
RAIN GUTTER
A
Nose Cargo Door Latch Actuator Installation Figure 402
B26910
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A
747-400 MAINTENANCE MANUAL
 (b)  Remove bolts that attach the actuator to the latch fitting and remove the actuator.
 NOTE: Do not loosen the latch fitting on body frame when you
____ replace the actuator. The installation of the latch fitting without interference with the mating fitting on the door is difficult to accomplish.
 S 024-008
 (3)  For Latch Actuator 7L or 7R,
 Do these steps to remove the latch actuator:

 NOTE: The terminal fitting on the linear actuator interferes with
____ the removal of the actuator 7L & 7R; therefore, the latch actuator and latch fitting must be removed together.
 (a)  
Disconnect the actuator electrical connector.

 (b)  
Make a mark for the latch fitting location for installation.

 (c)  
Loosen nut to remove the attachment bolts on the latch fitting.

 (d)  
Remove the bolts with care to avoid damage to the protective coating.

 (e)  
Remove the latch actuator and latch fitting.

 (f)  
Remove bolts that attach the latch actuator to the latch fitting and remove the latch actuator.

 TASK 52-31-05-404-002
 3. Nose Cargo Door Latch Actuator Installation (Fig.___________________________________________401)
 A. Consumable Materials
 (1)  
Primer - BMS 10-11, Type I (Ref 20-30-02)

 (2)  
Adhesive - BAC 5010, Type 48 (Ref 20-30-05)

 B.
References

 (1)  
24-22-00/201, Manual Control

 C.
Access

 (1)  
Location Zone
 801 Nose Cargo Door

 D.
Prepare For Installation

 (1)
Open the nose cargo door to get access to the latch actuator.

 S 864-009
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A
747-400 MAINTENANCE MANUAL
 S 864-010
 (2)  
Make sure these circuit breakers are open and attached with the DO-NOT-CLOSE tags:

 (a)  
On the Auxilary External 2 Power Center-Right panel P715: 1) 715XX, NOSE CARGO DOOR

 (b)  
On the Power Distribution Center-Right panel P415: 1) 415F16, NOSE CARGO DOOR CONTROL

 (c)  
On the Nose Cargo Door Power panel H122:
 1) 122XX, DOOR LIFT
 2) 122XX, PULL UP CAM
 3) 122XX, LATCHES 1-4R
 4) 122XX, LATCHES 1-4L
 5) 122XX, LATCHES 5-8R
 6) 122XX, LATCHES 5-8L

 E.
Latch Actuator Installation

 S 424-011
 (1)  
For All Latch Actuators Except 7L and 7R, Install the latch actuator and filler block on latch fitting with bolts, washers, and nuts.

 (a)  
　
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