S 226-011

 (4)  Examine the uplatch hook (Section C-C).
 (a) Remove the uplatch hook from the structure (AMM 52-36-03/401).
 (b) Do the step that tells how to examine the wear limits.
 S 226-012
 (5)  Examine the latch probe (Section A-A).
 (a) Remove the latch probe from the door.
 1) Remove the bolt that holds the push rod to the latch probe.
 2) Release the spring from the latch probe.
 3) Pull the latch probe out of the fitting.
 (b) Do the step that tells how to examine the wear limits.
 S 226-013
 (6)  Examine the bolt that attaches the snubber (Section B-B).
 (a) Remove the bolt.
 (b) Do the step that tells how to examine the wear limits.
 S 226-005
 (7)  Examine the wear limits (Fig. 601).
 (a) Measure the part at the points that are necessary.
 (b) Compare the values you get to the correct values shown in
 Fig 601.
 (c) Obey the instructions in Fig. 601.
 NOTE: If the part is satisfactory, install it.____
 (d) Do the step that installs the applicable part.
 S 416-014
 (8)  Install the uplatch hook on the structure (AMM 52-36-03/401).
 S 416-015
 (9)  Install the latch probe.
 (a) Push the latch probe into the fitting.
 NOTE: See that the probe goes through the spring when it____
 goes into the fitting.
 (b) Attach the spring to the probe.
 (c) Attach the push rod to the probe.
 S 416-016

 (10)
 Install the bolt that attaches the snubber. S 436-007

 (11)
 Install the lining on the bulk cargo door.

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A
747-400 MAINTENANCE MANUAL
 S 416-008
 (12) Close the bulk cargo door.
 TASK 52-36-01-206-017
 3.  Do an inspection of the latch mechanism of the bulk cargo door______________________________________________________________
 NOTE: This is a scheduled maintenance task.
____
 A. Access
 (1)  
Location Zone
 146 Bulk Cargo Compartment, RH

 (2)  
Access Panel
 823R Door - Bulk Cargo Compartment

 B.
Procedure

 S 016-018
 (1)  
Open the bulk cargo door sufficiently for access (AMM 52-36-00/001).

 S 026-019

 (2)  
Remove the lining from the bulk cargo door.

 S 216-020

 (3)  
Examine the latch mechanism for corrosion, deterioration and general condition.

 (4)  
Install the lining on the bulk cargo door.

 (5)  
Close the bulk cargo door.

 S 426-021
 S 416-022
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 BULK CARGO DOOR BALANCE MECHANISM - REMOVAL/INSTALLATION
________________________________________________________
 1.  General
_______
 A.  This procedure contains these tasks:
 (1)
The removal of the balance mechanism from the bulk cargo door

 (2)
The installation of the balance mechanism on the bulk cargo door.

 (3)
a task to do a check of the bulk cargo door counterbalance

 B.  
The balance mechanism has a spring tube, a cable drum, and two cables. One cable is between the spring tube and the cable drum. One cable is between the cable drum and the door. There must be no tension on the cables when you remove the mechanism.

 C.  
The task to do a check of the bulk cargo door counterbalance is included in the tasks to remove and install the balance mechanism for the bulk cargo door. Thus, if you do the task to remove the balance mechanism or the task to install the balance mechanism, the it is not necessary to do the task to do a check of the bulk cargo door counterbalance.
　
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