A

ANTI-ICING PRESSURE REGULATING VALVE (PRV)
FWD
A
OVERRIDE DEVICE 
NORMAL OVERRIDE  OVERRIDE DEVICE  VALVE LOCKED 
DEVICE STOWED  VALVE LOCKED CLOSED  PARTIALLY OPEN 
A-A  A-A  A-A  689535 

Inlet Cowl Anti-icing Pressure Valve - Manual Override Setting
Figure 201 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITHOUT SB 30-9534 ú

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E29359
A
757
MAINTENANCE MANUAL

1. OVERRIDE ASSEMBLY  B  2. BOLT (6 LOCATIONS) 
6. LOCKNUT 
SEE  B  4. POSITION 5. THREAD SHAFT INDICATOR PLATE  3. GASKETS 
7. VALVE POSITION INDICATOR ASSEMBLY 
8. ELECTRICAL CONNECTOR 

VALVE CLOSED
C
VALVE PART OPEN
B
D
VALVE CLOSED
E
VALVE PART OPEN
ANTI-ICING PRESSURE REGULATING VALVE (PRV)
FWD
F

B
SEE D
SEE F
SEE D
SEE C
SEE E
SEE C
OVERRIDE DEVICE NORMAL OVERRIDE OVERRIDE DEVICE VALVE LOCKED DEVICE STOWED VALVE LOCKED CLOSED PARTIALLY OPEN B-B B-B B-B C3309A
Inlet Cowl Anti-icing Pressure Valve - Manual Override Setting
Figure 201 (Sheet 2)

E29362
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A

757
MAINTENANCE MANUAL

 D.  ON ENGINES WITHOUT SB 30-9534; Procedure
 S 862-028
 (1)  
Open the circuit breakers on the overhead panel P11 to isolate the anti-icing PRV, and attach a DO-NOT-CLOSE tags.

 S 012-006

 (2)  
Open the left fan cowl panel (AMM 71-11-04/401). Obey the
 precautions that apply to Kevlar wrapping.

 S 032-010

 (3)  
Remove the bolts (2) that hold the override assembly (1) to the valve body.

 S 022-011

 (4)  
Remove the override assembly (1), the gaskets (3), and the position indicator plate (4) from the valve body.

 S 432-018

 (5)  
Put the gasket (3) and the override assembly (1) on the valve body. Make sure the tongue is engaged with the groove in the valve head. Move the valve head manually, if necessary, to engage the tongue (Fig. 201, Detail A).
　
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