(2)  
Speed Control Valve Water Separator Installation

 (3)  
Shutoff Valve Water Separator Removal

 (4)  
Shutoff Valve Water Separator Installation

 (5)  
In-line Air Filter Removal

 (6)  
In-line Air Filter Installation

 (7)  
Clean an Air Filter

 (8)  
Water Separator and In-line Air Filter Installation Inspection

 (9)  
Clean the Water Separator Bleed Hole.

 B.  
The removal/installation of the air filter and water separator vary depending on the incorporation of in-line air filters. On turbine drive units not incorporating in-line air filters, the air filter and water separator is a single assembly and the removal/installation can be completed together. On turbine drive units incorporating in-line air filters, the air filter and water separator for the speed control valve actuator are adjacent installations and share common connections. Therefore, the removal/installation may also be completed together. However the air filter and water separator for the shutoff valve actuator are separate installations and the removal/installation may only be completed separately. Below is a list of Turbine Drive Unit part numbers which have incorporated In-Line Air Filters, and those which do not come with In-Line Air Filters. The In-Line Filters are not cleanable, and must be replaced.

 (1)  
Turbine Drive Units delivered with the original Cleanable Air Filter configuration (cleanable and re-usable):

 60B00158 -7, -8, -9, -10, -11, -12, -14, -16, and 60B00158-2, -5 after incorporation of Fairchild SB TP85-1-29-09.

 (2)  
Turbine Drive Units delivered with the Non-Cleanable In-Line Air Filter configuration (Non re-usable - must be replaced):

 60B00158 -17 and 60B00158-18.
 C.  Water separators are on the shutoff and the speed control valve of the torque box on each strut. The water separator for the shutoff valve actuator is on the forward side of the valve unit. The water separator for the speed control valve is on the aft side of the valve unit.
 D.  TURBINE DRIVES WITH IN-LINE AIR FILTERS;
 An in-line air filter is installed at the tube connection to the water separator housing for the speed control valve. The in-line air filter for the water separator on the shutoff valve is installed at the tube connection to the solenoid valve assembly.
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 29-11-15
 ALL  ú ú 02 Page 201 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TASK 29-11-15-002-084
 2.  Air Filter and Water Separator Removal (For Turbine Drive Units Without_______________________________________________________________________ In-Line Air Filters) (Fig. 201).____________________
 A.  References
 (1)  
AMM 36-00-00/201, Pneumatic System

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

 B.  
Access

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

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

 C.  
Procedure

 S 012-097
 (1)  
Open the fairing doors on the trailing edge of the applicable strut (AMM 54-62-00/201).

 S 862-098

 (2)
Release the pressure in the pneumatic system (AMM 36-00-00/201).

 S 032-101

 (3)  
Disconnect control air pressure.

 S 022-102

 (4)  
Remove mounting bolts and remove air filter and water separator. Discard O-Ring from the inside of the mounting flange.

 (5)  
Remove filter element from filter and discard O-Ring.

 (6)  
Check filter element for holes and dents.

 S 022-103
 S 212-104
 NOTE: Severely dented filter elements must be replaced.
____
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