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 1.  General
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 A.  This procedure contains the tasks to remove and install the shutoff and speed control valve. The installation task also contains a test of the installation of the shutoff and speed control valve.
 B.  The shutoff and speed control valve is on the aft side of the torque box in the aft nacelle strut. The valve is attached to the left side of the turbine drive on the air-driven pump (ADP).
 C.  You can get access to the shutoff and speed control valve through the fairing doors on the trailing edge of the strut. Before you can remove the valve, you must remove the ADP turbine drive.
 TASK 29-11-09-004-001
 2.  Shutoff and Speed Control Valve Removal (Fig. 401)
_______________________________________
 A.  References
 (1)  
AMM 29-11-08/401, Air-Driven Pump Turbine Drive

 (2)  
AMM 54-62-00/201, Nacelle Strut Access Panels

 (3)  
IPC 29-11-41 Fig. 1

 B.  
Access

 (1)  
Location Zone
 454 System 1 - Strut Aft Fairing
 484 System 4 - Strut Aft Fairing

 (2)  
Access Panel
 454A Trailing Edge Fairing Doors - System 1
 484A Trailing Edge Fairing Doors - System 4

 C.  
Procedure

 S 014-002
 (1)  Open the fairing doors on the trailing edge of the strut (AMM 54-62-00/201).
 S 034-003
 CAUTION: MAKE SURE YOU HAVE SUFFICIENT SUPPORT EQUIPMENT AND A CLEAN
_______ AREA TO DO THE WORK. DAMAGE TO THE TURBINE DRIVE UNIT CAN OCCUR.
 (2)  Remove the ADP turbine drive (25) (AMM 29-11-08/401).
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 ALL  ú ú 01 Page 401 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400 MAINTENANCE MANUAL
MOUNTING FLANGEENGINE FOR THE TURBINENACELLE
10. NUT STRUT
B
DRIVE11. WASHER
12. WASHER
13. SHIM
B
0.002 INCH MAX GAP
SHUTOFF/SPEED
CONTROL MOUNTING
FLANGE

14. WASHER
9.  SPRING (QTY 4) 0.135-0.145 INCH
15. SPACER
17. BOLT
SEE A 16. NUT
(2 LOCATIONS) A-A
SHUTOFF/SPEED
7.
 CLAMP  CONTROL MOUNTING

8.
 GASKET

FLANGE
6.  CLAMP MOUNTING FLANGE (2 LOCATIONS) FOR THE TURBINE
2.
 NUT

DRIVE
3.  
WASHER
(2 LOCATIONS)

B-B
SEE B
4.
 SPACER

5.
 BOLT

1.  SHUTOFF/SPEED
A
CONTROL VALVE
A
TURBINE DRIVE INSTALLED
A

Shutoff and Speed Control Valve Unit Installation
Figure 401 (Sheet 1)

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 ALL  ú ú 01 Page 402 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

19. PRESSURE TUBE FOR
THE CONTROL AIR

18. FILTER ELECTRICAL COMPONENT
C
ASSEMBLY
20. CYLINDER
C
PORT TUBE
WATER SEPARATOR FOR THE SPEED CONTROL VALVE
21. SUPPLY PORT TUBE
22. FILTER
FWD
B
23. UNION
24. PACKING
WATER
SEPARATOR
REDUCER

C-C
Shutoff and Speed Control Valve Unit Installation Figure 401 (Sheet 2)
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 29-11-09
 ALL  ú ú 01 Page 403 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

25. AIR-DRIVEN PUMP  26. GOVERNER 
TURBINE DRIVE  UNIT TUBE 
27. BOLT 
28. WASHER 
(2 LOCATIONS) 
29. NUT 
　
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