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 lubricated with engine oil, and bushings. b) Install the rod ends with bolts with the threads lubricated with engine oil, and bushings. 6) Tighten the bolts to 36-40 pound-inches (4.1-4.5 newton-meters).
 7)  Tighten the jamnuts on the rod ends to 14-16 pound-inches (1.6-1.8 newton-meters). a) Install some lockwire to the jamnuts and the adjuster.
 (i)  
Attach the rod end of the control cable for the TCC air valve to the idler arm. 1) Attach the rod end with a bolt with the threads lubricated

 with engine oil, and a nut. 2) Tighten the nut to 36-40 pound-inches (4.1-4.5 newton-meters).

 (j)  
Adjust the TCC system (AMM 75-24-00/501).

 E.  
Put the Airplane Back to Its Usual Condition.

 S 416-032-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 thrust reversers (AMM 78-31-00/201).

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

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

 S 446-026-N00

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

 

 S 416-028-N00
 S 416-027-N00
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 75-24-00
 ALL  ú ú N04 Page 622 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
TURBINE VANE AND BLADE COOLING AIR VALVE - REMOVAL/INSTALLATION
_______________________________________________________________
 1.  General
_______
 A.  This procedure removes and installs the left and right turbine-vane-and-blade cooling air (TVBCA) valves. The differences in the removal and installation instructions between the left and right TVBCA valves are written in the procedure.
 B.  The cooling air valves are found on the high pressure compressor (HPC) aft case at the 3 and 9:30 o'clock positions.
 C.  You must remove the pressure regulating valve, intermediate to high pressure tee, and intermediate pressure check valve before you remove the left TVBCA valve. You must also remove the position switch for the TVBCA valve before you remove the right TVBCA valve.
 D.  You can get access to the TVBCA valves through the applicable thrust reverser half.
 TASK 75-24-01-004-001-N00
 2.  Remove the Turbine-Vane-and-Blade Cooling Air-Valves
____________________________________________________
 A.  Standard Tools and Equipment
 (1)
Adapter - Torque, 5/16 inch (7.94 mm), 12 point with 2.56 inches

 (65.09 mm) in length (optional)

 B.  
References

 (1)
AMM 36-11-01/401, Pneumatic Manifold

 (2)
AMM 36-11-02/401, Intermediate Pressure Check Valve

 (3)
AMM 36-11-19/401, Pressure Regulating Valve (PRV)

 (4)
AMM 71-11-04/201, Fan Cowl Panels

 (5)
AMM 71-11-06/201, Core Cowl Panels

 (6)  
AMM 75-24-13/401, Turbine-Vane-and-Blade Cooling Air-Valve Position Switch

 (7)
AMM 78-31-00/201, Thrust Reverser System

 C.  
Access

 (1)  
Location Zone
 412 Engine 1 - HPC 3 or 9:30 o'clock
 422 Engine 2 - HPC 3 or 9:30 o'clock
 432 Engine 3 - HPC 3 or 9:30 o'clock
 442 Engine 4 - HPC 3 or 9:30 o'clock

 

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 75-24-01
 ALL  ú ú N01 Page 401 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
34. TUBE UNION
WIRE BUNDLE SUPPORT BRACKET
35. WASHER 
SEE  A  37. FIRE  36. BOLT 
EXTINGUISHER  38. NUT 
TUBE 

FWD
B
WIRE BUNDLE SUPPORT BRACKET
SEE B 3. TURBINE BLADE COOLING AIR TUBE
36. SCREW
35. WASHER
38. NUT 8. TURBINE VANE 22. AIR SIGNAL COOLING AIRTUBE NUT DUCT
　
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