(5)  
High Stage Regulator

 (6)  
390°F Thermostat (Precooler)

 (7)  
450°F Thermostat (PRSOV)

 TASK 36-11-05-206-001
 2.  Do An Inspection/Check Of The Engine Bleed Air Control System_____________________________________________________________
 A.  General
 (1)  Three separate procedures are supplied in this task. Each task will examine a part of the engine bleed air control system. The first procedure will examine the Precooler Control Valve system. The second procedure will examine the PRSOV and Bleed Air Regulator system. The third procedure will examine the High Stage Valve and High Stage Regulator system.
 NOTE: The Bleed Air Control System Operational Test is necessary
____ only once if all of three procedures are accomplished in the order given below.
 Quick disconnect type fittings can be used on the Test Set Fittings.
 (2)  Make sure you apply anti-seize compound to all male threads before you reconnect the pneumatic control/supply lines.
 B.  Special Tools and Equipment
 (1)  Portable Valve Actuating Test Set (ITCAN)
 (a)  Garrett P/N 290121-3 or 290121-4 or 3792195-1
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
PORTABLE VALVE ACTUATING TEST SET
PRIMARY SYSTEM GAUGE
PRIMARY 
REGULATOR 
KNOB 
NITROGEN 
BOTTLE 
PRESSURE 
REGULATOR NO. 1 
PRESSURE 
REGULATOR NO. 2 
TEST SET 
FITTINGS 
TEST SET 
FITTINGS 
GARRETT P/N 290121-3 
Portable Valve Actuating Test Set 
Figure 601 (Sheet 1) 

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

KNOB REGULATOR PRIMARY  BOTTLE NITROGEN 
PRIMARY SYSTEM GAUGE 

TEST SET FITTINGS 
PRESSURE REGULATOR NO. 1 
NO. 2 REGULATOR PRESSURE 
PORTABLE VALVE ACTUATING TEST SET 
GARRETT P/N 3792195-1
Portable Valve Actuating Test Set Figure 601 (Sheet 2) 

C45586
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 C.
D.
E.
A
737-300/400/500MAINTENANCE MANUAL
 (2)  
Pressure Hoses:

 (a)  
TYPE A - (Quantity 2) - Pressure hose (12 ft.) rated at 300 psi. with these type of end fittings: 1) Female - which will fit MS33514-6 male type fittings

 (Flareless) 2) Female - which will fit MS33656-4 male type fittings (Flared)

 (b)  
TYPE B - (Quantity 2) - Pressure Hose (12 ft.) rated at 300 psi. with female fittings which will mate with MS33656-4 male type fittings (Flared).

 (3)  
Pneumatic Fittings:

 ~............................................................ | QUANTITY | TYPE | SPECIFICATION | .............................................................. | 1 | TEE | AN784-4 | .............................................................. | 1 | CAP | MS21914-6 | .............................................................. | 1 | UNION | MS21902-6 | .............................................................. | 1 | UNION | AN815-4D | .............................................................. | 1 | O - RING | MS29513-12 | .............................................................. | 2 (OPTIONAL) | 90° ELBOW (Flareless) | NAS1762J0606 | 2..............….......................….....................1
　
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