(a)
Lubricate the clamp bolt (11) and harness clamp bolts with Engine Oil (PWA 521).
(b)
Lubricate the nut threads of the main gearbox pressure tube (LP12) (5) with Antigalling Compound (PWA 550).
(c)
Install the clamp (24) on the upper end of the main gearbox pressure tube (LP12) (5).
(d)
Lubricate the packing (15) for the groove end of the main gearbox pressure tube (LP12) (5) with Engine Oil (PWA 521).
(e)
Install the packing (15) to the groove on the main gearbox pressure tube (LP12) (5).
(f)
Attach the main gearbox pressure tube (LP12) to the (LP08) tee (23), hand tight only.
(g)
Install the clamp bolt (21) to the clamp and the bracket (20), hand tight only.
(h)
Install the two bolts (14) to the main gearbox pressure tube flange.
(i)
Torque the two flange bolts (14) to 85-95 pound-inches (9.6-10.7 newton-meters).
(j)
Attach the W3 and W5 harness clamp bolts (11) and nuts (13) to the main gearbox pressure tube (LP12) (5).
(k)
Torque the clamp (24) bolt to 36-40 pound-inches (4.1-4.5 newton-meters).
(l)
Torque all the harness clamp bolts (11) to 36-40 pound-inches (4.1-4.5 newton-meters).
(m)
Torque the main gearbox pressure tube (LP12) (5) to the (LP08) tee (23) to 340-375 pound-inches (38.4-42.4 newton-meters).
(n)
Safety the main gearbox pressure tube nut with Lockwire (G02334) or Safety Cable (G02335) and Safety Cable Ferrule (G02332).
S 424-017-N00
(6)
Install the heatshield (22) to the (LP08) tee (23).
(a)
Lubricate the three heat shield bolts (25) with Engine Oil (P03-001).
(b)
Install the heatshield (22) and clamp (26) to the (LP08) tee (23) with the three bolts (25) and nuts (27).
(c)
Torque the three bolts (25) to 36-40 pound-inches (4.1-4.5 newton-meters).
(d)
Torque the clamp (26) on the main gearbox pressure tube (LP12)
(5) to the heatshield (22) to 18-23 pound-inches (2.0-2.6 newton-meters).
(e)
Safety the three heatshield bolts (25) with Lockwire (P05-289) or Safety Cable (P05-291) and Safety Cable Ferrule (P05-292).
S 424-018-N00
(7)
Install the AP-5 borescope plug (4) to the HPC.
(a)
Lubricate the threads of the AP-5 (4) with Antigalling Compound (PWA 586).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b)
Install the new key washer (3) and the plug (4) to the AP-5 port.
(c)
Torque the AP-5 borescope plug (4) to 175-190 pound-inches (19.8-21.5 newton-meters).
S 424-019-N00
(8)
Install the No. 3 Bearing Breather and Restrictor Valve
(AMM 79-21-11/401).
F.
Put the Aircraft Back to its Usual Condition.
S 864-020-N00
(1)
Do the steps in the Fuel Pump and Metering Unit to Put the Aircraft Back to its Usual Condition (AMM 73-11-01/401).
S 714-021-N00
(2)
Do the test for the fuel pump which is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).
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FUEL CONTROL SYSTEM - DESCRIPTION AND OPERATION
_______________________________________________
1. General
_______
A. The fuel control system interfaces with the airplane and controls many of the engine systems. The fuel control system does the functions that follow:
(1)
Controls the quantity of fuel to the fuel injectors
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本文链接地址：747-400 AMM 飞机维护手册 发动机燃油和控制 1(96)
