(b)
At the strut to wing interface aft of the torque bulkhead:
~............................................................. |Nac. Strut 1 | Nac. Strut 4 | | | ...............................................................
| D8450P | D8453P | | | ............................................................... | D8451P | D8454P | | | 2.............…...............…...............…...............1
(c) If it is necessary, tag the electrical connectors for identification. 1) Pull the wire bundles to the aft end of the strut. 2) Put the wire bundles on the top of the wing.
S 034-025
(25)
On outboard struts, remove the air-driven pump aft of the torque bulkhead (AMM 29-11-17/401).
S 034-027
(26)
On outboard struts, remove the air-driven pump turbine drive aft of the torque bulkhead (AMM 29-11-08/401).
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747-400 MAINTENANCE MANUAL
S 034-028
(27)
On inboard struts, remove the AC motor-driven pump aft of the torque bulkhead (AMM 29-11-19/401).
S 034-029
(28)
Disconnect the hydraulic hose from the clamps that attach the hose to the diagonal brace.
S 034-030
(29)
Disconnect the pneumatic tube from the clamps that attach the tube to the diagonal brace.
S 034-032
(30)
Disconnect the ground lead between the strut and wing.
S 034-033
(31)
Remove the screws and break the seal along the lower edge of the wing front spar.
F. Remove the Nacelle Strut (Fig. 403)
S 494-143
(1) Use the tool placard to install the strut preload sling
G54007 (Fig. 402).
S 984-144
CAUTION: DO NOT EXCEED UPLOAD NECESSARY TO PERMIT PIN/BOLT ROTATION WITH
_______ THE APPLICATION OF 125 POUND-INCHES MAXIMUM TORQUE. DO NOT LIFT THE STRUT OR PULL DOWN ON THE STRUT WITH MORE THAN 3,000 POUNDS OF FORCE ON THE INBOARD STRUTS OR 1,800 POUNDS OF FORCE ON THE OUTBOARD STRUTS. IF YOU APPLY A FORCE THAT IS MORE THAN NECESSARY, DAMAGE TO THE STRUCTURE CAN OCCUR.
(2) Gently apply a load sufficient to remove the strut preload.
NOTE: This is to remove the load from the pin/bolt that you will
____
remove.
(a) Make sure the pin/bolt to be removed can be rotated by applying no more than 125 pound-inches (14.3 N.m) torque.
NOTE: Castellated nuts may have to be tightened up to 200
____ pound-inches (22.6 N.m) to allow the fuse pin assembly to rotate as a unit with 125 pound-inches (14 N.m) applied torque.
S 034-035
(3) Disconnect the diagonal brace at the forward end (AMM 54-51-01/401).
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A 747-400 MAINTENANCE MANUAL
UPPER LINK
SIDE BRACE
DIAGONAL
BRACE
SEE A
NACELLE STRUT
TORQUE BOX
SIDE BRACE
OUTBOARD STRUT
A
UPPER LINK
DIAGONAL BRACE
NACELLE STRUT TORQUE BOX
INBOARD STRUT A
Nacelle Strut - Removal/Installation
Figure 403
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(4) S 034-036Remove the aft fuse pin of the diagonal brace (AMM 54-51-02/401).
(5) S 034-037Remove the diagonal brace.
(6) S 094-146Slowly release the load on the diagonal brace unload sling and remove the sling.
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