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 7)  Lubricate the threads of the bolt, which attaches the tube clamp, with engine oil. 8) Attach the tube clamp on the aft end of the drain tube to the bracket on the flange M with the bolt, nut, and washer. 9) Tighten the tube nut and the bolts for the tube clamps.
 (v)  ENGINES WITH A BORESCOPE PLUG IN THE TVC DUCT; Do the steps that follow: 1) Install the gasket to the groove of the borescope plug. 2) Install the borescope plug to the aft elbow of the TVC air
 duct. 3) Engage the end of the borescope plug into the inner hole of the HPT. 4) Lubricate the threads of the bolts, which attach the borescope plug, with engine oil. 5) Attach the borescope plug with the bolts. a) Tighten the bolts, from one corner to the opposite corner, to 75-85 pound-inches (8.5-9.6 newton-meters). b) Without loosening, tighten the bolts again until the necessary torque is kept.
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 75-24-02
 ALL  ú ú N06 Page 424 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
c)  Safety the bolts with lockwire or safety cable and safety cable ferrule.
 F.  Return the Aircraft to its Usual Condition
 S 414-128-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  
Close the left thrust reverser (AMM 78-31-00/201).

 S 414-129-N00

 (2)  
Close the left core cowl panel (AMM 71-11-06/201).

 S 414-130-N00

 (3)  
Close the left fan cowl panel (AMM 71-11-04/201).

 S 444-131-N00

 (4)  
Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).

 

 TASK 75-24-02-404-078-N00
 9.  Install the No. 4 Turbine Vane Cooling Air Duct (Fig. 402)
_______________________________________________
 A.  Equipment
 (1)  
M303, M305, or M307 Bergen Mechanical Crimper
 Bergen Cable Technologies Inc
 170 Gregg St

 P.O. Box 1300
 Lodi, NJ 07644-9982

 B.  
Consumable Materials

 (1)  
D00390 Oil - Engine

 (2)  
G00767 Wax - Paraffin, PMC 9552

 (3)  
G02334 Lockwire - AS3214-02

 (4)  
G02332 Ferrule - P05-292 (Optional)

 (5)  
G02335 Cable - Safety - P05-291 (Optional)

 C.  
References

 (1)  
AMM 71-11-04/201, Fan Cowl Panels

 (2)  
AMM 71-11-06/201, Core Cowl Panels

 (3)  
AMM 78-31-00/201, Thrust Reverser System

 (4)  
IPC 75-24-07 Fig. 1

 D.  
Access

 (1)  
Location Zone
 412 Engine 1 - Aft HPC Case to Fwd HPT Case
 422 Engine 2 - Aft HPC Case to Fwd HPT Case
 432 Engine 3 - Aft HPC Case to Fwd HPT Case
 442 Engine 4 - Aft HPC Case to Fwd HPT Case

 

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 75-24-02
 ALL  ú ú N06 Page 425 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(2)  
Access Panel
 415 Left Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4

 E.
Procedure

 S 424-172-N00
 (1)  
Install the No.4 turbine-vane cooling air-duct:

 (a)  
Remove the protection caps from the TVC air duct, and the openings on the HPT case and the TVBCA valve port.

 (b)  
Attach the gasket on the flange of the TVBCA valve with paraffin wax.

 (c)  
ENGINES WITHOUT PHASE 3 CHANGES OR PRE-PW-SB 72-315 OR PRE-PW-SB 75-57; Attach the plate with paraffin wax.

 (d)  
ENGINES WITH PHASE 3 CHANGES POST-PW SB 72-315 OR POST-PW-SB 75-57; Attach a new gasket on the HPT pad where the rear flange of the TVCA duct goes.
　
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