(25)
 AMM 21-58-51/401, Equipment Cooling Blower Check Valves

 (26)
 AMM 21-58-61/201, EFIS Cooling Air Cleaner

 (27)
 AMM 21-58-91/201, EFIS Cooling Check Valves

 (28)
 AMM 21-61-11/401, Air Mix Valve

 (29)
 AMM 21-61-21/401, Pack Temperature Control Valve

 (30)
 AMM 27-31-17/201, Elevator Pitot - Static System.

 (31)
 AMM 27-81-21/601, Leading Edge Slats

 (32)
 AMM 28-11-11/401, Wing Fuel Tank Access Panels

 (33)
 AMM 29-09-11/201, Hydraulic Reservoir Pressure Module

 (34)
 AMM 29-15-00/601, Hydraulic Systems A, B, and Standby

 (35)
 AMM 30-11-13/401, WTAI Solenoid Valve

 (36)
 AMM 32-21-11/801, Nose Gear Shock Strut

 (37)
 AMM 36-11-15/401, Pressure Regulating and Shutoff Valve

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 05-51-57
 ALL  ú ú 03 Page 202 ú Mar 12/02
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A 737-300/400/500MAINTENANCE MANUAL
 (38)
 AMM 34-11-00/201, Pitot Static System.

 (39)
 AMM 36-11-16/401, Bleed Air Regulator

 (40)
 AMM 36-11-25/401, Bleed Air Isolation Valve

 (41)
 AMM 36-11-35/401, Engine Bleed Air Check Valve

 (42)
 AMM 36-11-51/401, APU Check Valve

 (43)
 AMM 36-11-85/401, High Stage Valve

 (44)
 AMM 36-11-86/401, High Stage Regulator

 (45)
 AMM 36-12-25/401, Bleed Air Precooler

 (46)
 AMM 36-12-35/401, Precooler Control Valve

 (47)
 AMM 36-12-55/401, 450 degree F Thermostat

 (48)
 AMM 36-21-11/401, Duct Pressure Transmitter

 (49)
 AMM 38-11-00/001, Passenger Water System

 (50)
 AMM 38-11-21/401, Water Quantity Transmitter

 (51)
 AMM 49-31-22/401, Fuel Filter

 (52)
 AMM 49-51-00/201, Cooling Fan Inlet Screen

 (53)
 AMM 49-51-22/401, Cooling Air Shutoff Valve Filter

 (54)
 AMM 49-52-21/301, Differential Air Pressure Regulator Filter

 (55)
 AMM 49-52-91/701, Compressor Discharge Pressure Orificed T-Fitting

 (56)
 AMM 49-91-12/401, Oil Filter

 (57)
 AMM 72-00-00/601, Engine

 (58)
 AMM 80-11-03/401, Start Valve

 C. Procedure
 S 212-021
 (1)  Examine the wing.
 (a)  
Examine the wing leading edges for dents, abrasion, and allowable skin thickness (SRM 57-43-01).

 (b)  
Examine the wing leading edge for roughness (SRM 57-43-01 PAGE 105, ITEM E).

 S 212-022
 (2)  Examine the front of airplane.
 (a)  
Examine the fuselage for abrasion.

 (b)  
Examine the windshields and windows for abrasion which decreases vision.

 (c)  
Make sure there is no ash on or in the pitot/static probes and static ports, (AMM 34-11-00/201).

 S 212-023
 (3)  Examine the engines.
 (a)  
Examine the engines for damage (AMM 72-00-00/601).

 (b)  
Examine the engine control mechanisms and linkages for ash.

 S 212-024
 (4)  Examine the air conditioning system.
 (a)  Examine the Cabin Pressurization Outflow Valve (AMM 21-31-11/401). 1) If you find volcanic ash in the valve, clean or replace the
 valve.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 
737-300/400/500MAINTENANCE MANUAL
 (b)  Remove and examine the Safety Relief Valves (AMM 21-32-21/401). 1) If you find volcanic ash in the valves, clean or replace the valves.
 (c)  Remove and examine the Safety Relief Valve filters (AMM 21-32-22/401). 1) If you find volcanic ash in the filters, clean or replace the filters.
　
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