E.  
Procedure

 S 424-169-N00
 (1)  
Install the No.1 turbine-vane cooling air-duct:

 (a)  
Remove the protection caps from the TVC air duct, and openings on the HPC and HPT cases.

 (b)  
ENGINES WITHOUT PHASE 3 CHANGES; Attach the new gasket on the HPC case pad with paraffin wax.

 (c)  
ENGINES WITH PHASE 3 CHANGES; Attach a new gasket to the forward flange of the cooling air duct with paraffin wax.

 (d)  
ENGINES WITHOUT PHASE 3 CHANGES AND PRE-PW-SB 72-315 OR POST-PW-SB 75-57; Install a new gasket on the HPT case pad with the paraffin wax.

 (e)  
ENGINES WITH PHASE 3 CHANGES OR POST-PW-SB 72-315; Install a new metering orifice seal plate, convex side out, on the HPT case at approximately the one o'clock position. 1) Attach the plate with paraffin wax to the HPT case.

 (f)  
Lubricate the threads of the bolts, which attach the TVC air duct, with engine oil.

 (g)  
Install the TVC air duct to the pads on the HPC and HPT cases with the bolts. 1) ENGINES PRE-PW-SB 75-114;

 Use the larger bolts at the aft flange and the bracket at the forward flange.
 2)  ENGINES POST-PW-SB 75-114; Use the larger bolts at the aft flange and the siverplated bolts and the bracket at the forward flange.
 3)  Tighten the bolts with your hand.
 (h)  
Lubricate the threads of the bolts, which attach the clamp on the TVC air duct, with engine oil.

 (i)  
Attach the clamp on the TVC air duct at the support on the diffuser case with the bolts. 1) Tighten the bolts to 65-85 pound-inches (7.3-9.6

 newton-meters). 2) Safety the bolts with lockwire or safety cable and safety cable ferrule.

 (j)  
Tighten the bolts, from one corner to the opposite corner, at the forward flange to 85-95 pound-inches (9.6-10.7 newton-meters). 1) Without loosening, tighten the bolts again until the

 necessary torque is kept. 2) Safety the bolts with lockwire or safety cable and safety cable ferrule.
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 75-24-02
 ALL  ú ú N01 Page 416 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(k)  Tighten the bolts, from one corner to the opposite corner, at the aft flange to 180-200 pound-inches (20.3-22.6 newton-meters). 1) Without loosening, tighten the bolts again until the
 necessary torque is kept. 2) Safety the bolts with lockwire or safety cable and safety cable ferrule.
 F. Put the Aircraft Back to its Usual Condition
 S 414-123-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 right thrust reverser (AMM 78-31-00/201).

 S 414-120-N00

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

 S 414-121-N00

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

 S 444-122-N00

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

 TASK 75-24-02-404-049-N00
 7. Install the No. 2 Turbine Vane Cooling Air Duct
_______________________________________________
 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 71-00-50 Fig. 1

 (5)  
IPC 75-20-01 Fig. 1

 (6)  
IPC 75-24-07 Fig. 1

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