S 014-019
(19)
Open the cover of the wing leading edge.
S 034-020
(20)
Disconnect these tubes which are found on the closure spar (Fig. 401):
(a) The fuel supply tube
1) Disconnect the coupling on the fuel supply tube
(AMM 28-00-00/201).
2) Remove the clamp block that connects the fuel supply tube to the upper link (on the outboard struts) or to the strut (on the inboard struts).
3) Disconnect the ground lead from the fuel tube section in the wing.
(b)
The pneumatic tube
1) Disconnect the tube nut, at the wing bulkhead, on the pneumatic tube.
(c)
The hydraulic tubes
1) Disconnect the tube nuts on the case drain tube.
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2) Disconnect the thrust reverser pressure and return tubes. 3) Remove the clamp block that attaches the three hydraulic tubes to the strut.
(d) The fire extinguisher tube 1) Disconnect the tube nut on the fire extinguisher tube. 2) Remove the clamp that attaches the fire extinguisher tube
to the strut. 3) On outboard struts disconnect the strut drain line exit at the bulkhead penetration at NAC STA 241.
S 034-021
(21) Disconnect these pneumatic ducts (AMM 36-11-01/401):
(a)
On outboard struts, disconnect the pneumatic supply duct which is found at the aft of the torque bulkhead. 1) Remove the duct coupling clamp. 2) Disconnect the pneumatic tube from the pneumatic duct. 3) Disconnect the two duct support links which are found near
the coupling clamp. a) Remove the bolt, bushing, washer, and nut for each of the link.
(b)
The wing anti-icing duct which is found above the closure spar 1) Remove the duct coupling clamp.
S 034-022
WARNING: CONNECT AND DISCONNECT ELECTRICAL LINES ONLY WITH THE
_______ ELECTRICAL POWER OFF. HIGH VOLTAGE CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(22) Do these steps to remove the generator power feeder from the strut (WDM Chapter 20).
(a)
Take the seal housing apart at the strut raceway.
(b)
Disconnect the seal block clamp where the power feeder goes through the midspar web of the strut. 1) Remove the sealant from the power feeder and from around
the power feeder.
(c)
Disconnect the clamps that attach the power feeder to the structure.
(d)
Disconnect the seal fittings at the strut bulkhead.
(e)
Pull the power feeder back through the strut and put it on a protective mat on the top of the wing.
S 034-129
(23) On inboard struts, disconnect the flight control wire bundles from the clamp that is attached to the upper link.
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S 034-023
(24) Disconnect the electrical connectors for the applicable strut as follows:
(a)
At the strut to wing interface above the closure spar: ~............................................................. |Nac. Strut 1 | Nac. Strut 2 | Nac. Strut 3 | Nac. Strut 4 | ...............................................................
| D7528P | D7538P | D7548P | D7568P | ............................................................... | D7529P | D7539P | D7549P | D7569P | ............................................................... | D7530P | D7540P | D7550P | D7537P | ............................................................... | D7531P | D7541P | D7551P | D7547P | ............................................................... | D7532P | D7542P | D7552P | D7567P | ............................................................... | D7533P | D7543P | D7553P | D7564P | ............................................................... | D7534P | D7544P | D7554P | D12038P | ............................................................... | D12040P | D12041P | D12042P | D12043P | 2.............…...............…...............…...............1 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 NACELLES/PYLONS(8)
