(1)
12-31-01/201, Zone Diagrams
(2)
12-31-91/201, Nacelle and Engine-To-Wing Access Doors and Panels
(3)
24-22-00/201, Manual Control
(4)
36-05-00/201, Pneumatic System
(5)
36-11-05/501, Engine Bleed Air Distribution System
(6)
36-11-15/401, Pressure Regulating and Shutoff Valve
(7)
36-11-16/401, Bleed Air Regulator
(8)
36-11-85/401, High Stage Valve
(9)
36-11-86/401, High Stage Regulator
(10)
36-12-35/401, Precooler Control Valve
(11)
78-31-00/201, Thrust Reverser SystemAccess
(1)
Location Zone (Ref 12-31-01/201)
(a)
503, Left Nacelle - Right Half Fan Cowl
(b)
504, Left Nacelle - Left Half Thrust Reverser
(c)
505, Left Nacelle - Right Half Thrust Reverser
(d)
603, Right Nacelle - Right Half Fan Cowl
(e)
604, Right Nacelle - Right Half Fan Cowl
(f)
605, Right Nacelle - Right Half Thrust Reverser
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737-300/400/500MAINTENANCE MANUAL
(2) Access Panels (Ref 12-31-91/201)
(a)
5737 - Left Engine, Right Half Fan Cowl Assembly
(b)
5738 - Left Engine, Left Half Thrust Reverser Assembly
(c)
5739 - Left Engine, Right Half Thrust Reverser Assembly
(d)
5746 - Left Engine, Left Half Fan Cowl Assembly
(e)
5837 - Right Engine, Right Half Fan Cowl Assembly
(f)
5838 - Right Engine, Left Half Thrust Reverser Assembly
(g)
5839 - Right Engine, Left Half Thrust Reverser Assembly
(h)
5846 - Right Engine, Right Half Fan Cowl Assembly
F. Prepare To Do The Engine Bleed Air System Inspection/Check
S 866-002
(1)
Supply electrical power to the airplane (Ref 24-22-00/201).
S 866-003
(2)
Set the ISOLATION valve switch on the P5-10 Air-Conditioning Module to the CLOSE position.
S 016-004
(3)
Open the fan cowl assemblies (Ref 78-31-00/201).
S 016-005
(4)
Open the thrust reverser assemblies (Ref 78-31-00/201).
S 866-006
(5)
Remove the electrical power from the airplane (Ref 24-22-00/201).
G. Examine the Precooler Control Valve System
S 216-134
(1) Use a mirror to examine the precooler control valve position indicator.
(a)
If the position indicator is in the CLOSED position, replace the precooler control valve (AMM 36-12-35/401), then go to step G.(14).
(b)
If the position indicator is in the full OPEN position, continue.
S 026-007
(2)
Disconnect the Precooler Control Valve supply pressure line from the left side of the Precooler Control Valve.
S 426-008
(3)
Install the NAS1762J0606 90° Elbow fitting on the Precooler Control Valve supply pressure port - (OPTIONAL).
(4)
Remove Test Set Cap No. 4.
S 026-009
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
PRECOOLER CONTROL VALVE
SEEA B
INDICATOR POSITION VISUAL 1 DRIVE WRENCHING MANUAL PRECOOLER CONTROL VALVE SUPPLY PRESSURE PORT
FWD
(EXAMPLE) ACTUATING TEST SET PORTABLE VALVE PRECOOLER CONTROL VALVE (LEFT SIDE)
FWD
A
TYPE A PRESSURE HOSE
TEST SET
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