S 864-010
 (5)  Open this circuit breaker on the P6 main power distribution panel and attach a DO-NOT-CLOSE tag:
 (a)  6F30, MASTER TRIM AIR CONT
 S 014-011
 (6)  Open the access panel, 191M-L (AMM 06-09-03/201).
 D. Remove the Trim Air PRSOV
 S 034-012
 (1)  
Disconnect the electrical connector, DV110, from the trim air PRSOV.

 S 034-013

 (2)  
Disconnect the bonding jumper from the trim air PRSOV.

 S 034-040
 WARNING: DO NOT REMOVE THE TRIM AIR PRSOV WHEN THERE IS PRESSURE IN THE
_______ DUCTS. MAKE SURE THAT YOU REMOVE THE PRESSURE IN THE PNEUMATIC SYSTEM BEFORE YOU DISCONNECT THE SENSE LINES. INJURY TO PERSONS CAN OCCUR IF YOU DO NOT REMOVE THE PRESSURE.
 (3)  
Disconnect the sense lines from the tee fittings just behind the valve (2 locations).

 (4)  
Put a cap on the sense lines.

 S 534-043
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 S 034-041
 (5)
Remove the clamps from both sides of the trim air PRSOV.

 S 024-042

 (6)  
Remove the trim air PRSOV from the ducts.

 S 534-015

 (7)
Put covers on the duct openings to keep out contamination.

 S 034-016

 (8)  
Remove the tee fittings from the ports on the trim air PRSOV.

 TASK 21-61-08-404-017
 3. Trim Air Pressure Regulating and Shutoff Valve Installation (Fig. 401)
___________________________________________________________
 A. Equipment
 (1)  Bonding Meter
 B. Consumable Materials
 (1)  
B00192 Solvent, BMS 3-2, Type 1

 (2)  
G00378 Alodine

 (3)  
G00033 Lint-free cheesecloth

 C. References
 (1)  
AMM 06-09-03/201, Body Section 44 Access Doors and Panels

 (2)  
AMM 20-11-14/701, Metal Surfaces- Cleaning/Painting

 (3)  
AMM 20-22-01/601, Electrical Bonding

 (4)  
AMM 21-00-00/201, Air Conditioning

 (5)  
AMM 24-22-00/201, Manual Control

 (6)  
AMM 31-61-00/201, Integrated Display System

 (7)  
AMM 36-00-00/201, Pneumatic Sytem

 (8)  
AIPC 21-61-68, Fig. 4

 (9)  
AIPC 21-61-10, Fig. 10

 (10)
 AIPC 21-61-10, Fig. 10A

 (11)
 AIPC 21-21-56, Fig. 2

 (12)
 WDM 21-61-93

 (13)
 SSM 21-61-05

 D. Access
 (1)  
Location Zone 133 Air Conditioning Equipment Bay, LH

 (2)  
Access Panels
 191M-L Air Conditioning Access Panel

 E. Install the Trim Air PRSOV
 S 864-018
 (1)  Make sure that there is no pressure in the pneumatic system (AMM 36-00-00/201).
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 S 434-044

 (2)  Install the two tee fittings into the ports on the body of the trim air PRSOV: (a) Replace the O-ring and the gasket on each of the tee fittings. (b) Put the tee fittings into the ports and tighten them with your hand.
 (3)  S 534-020Remove the covers which you installed on the duct openings.
 (4)  S 964-045Replace the seal assembly on each of the duct flanges if they are not serviceable (Fig. 401, Detail B).
 (5)  S 424-051Install the trim air PRSOV between the ducts and make sure that the arrow on the trim air PRSOV points in the aft direction.
 (6)  S 214-046Make sure that the two seal assemblies stay in the grooves on the duct flanges (Fig. 401, Detail B).
 (7)  S 434-047Put the two clamps around the mating flanges of the ducts and the trim air PRSOV (Fig. 401, Detail B).
　
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