C.  Procedure
 S 862-002-N00
 (1)  
Open this circuit breaker on the main power distribution panel, P6, and attach the DO-NOT-CLOSE tag:

 (a)  6J18, ENG START AIR CONT

 (2)  
Open the core cowl panels (AMM 71-11-06/201).

 S 012-003-N00
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
SEE B
START VALVE 
PACKING  GEARBOX MAIN 
BUSHING  A  STARTER  FWD 
VALVE START 
PNEUMATIC TUBE SENSING  FILTER  FWD 
B 
Figure 201 Start Valve Filter Installation 

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S 022-033-N00
 (3)  Do these steps to remove the filter (Fig. 201):
 (a)  
Disconnect the tube nut from the filter boss on the case of the start valve.

 (b)  
Pull the other end of the tube out.

 (c)  
Discard the packing from the bushing end.

 (d)  
Remove the filter from the boss.

 TASK 80-11-04-102-009-N00
 3.  Clean the Start Valve Filter____________________________
 A. Standard Tools and Equipment
 (1)  Air Source - Compressed, Clean, Filtered, Dry - 30 psi (200 kPa) maximum
 B. Consumable Materials
 (1)  B00722 Solvent - P-D-680
 C. References
 (1)  IPC 80-11-02 Fig. 1
 D. Access
 (1)  
Location Zone
 412 Engine No. 1
 422 Engine No. 2
 432 Engine No. 3
 442 Engine No. 4

 (2)  
Access Panel
 417 and 418 Core Cowl Panels - Engine No. 1
 427 and 428 Core Cowl Panels - Engine No. 2
 437 and 438 Core Cowl Panels - Engine No. 3
 447 and 448 Core Cowl Panels - Engine No. 4

 E. Procedure
 S 022-010-N00
 (1)  Remove the start valve filter, if it is necessary.
 S 112-036-N00
 WARNING: DO NOT GET THE SOLVENT IN YOUR MOUTH OR EYES, OR ON YOUR SKIN.
_______ DO NOT BREATHE THE FUMES FROM THE SOLVENT. PUT PROTECTIVE SPLASH GOGGLES AND GLOVES ON WHEN YOU USE THE SOLVENT. KEEP THE SOLVENT AWAY FROM SPARKS, FLAME, AND HEAT. THIS SOLVENT IS POISONOUS AND FLAMMABLE AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  Clean the filter with the solvent.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 162-037-N00
 WARNING:_______USE GOGGLES WHEN YOU USE COMPRESSED AIR. PARTICLES WHICH ARE
 BLOWN BY THE COMPRESSED AIR CAN CAUSE INJURY TO YOU.

 CAUTION: BE CAREFUL WHEN YOU USE COMPRESSED AIR TO CLEAN THE MESH OF THE
_______ FILTER SCREEN. COMPRESSED AIR CAN CAUSE DAMAGE TO THE MESH OF THE FILTER SCREEN.
 (3)
Use the compressed air at not more than 30 psig to dry the filter.

 S 212-014-N00

 (4)  
Make sure there is no unwanted material in the filter.

 (a)  If you find unwanted material in the filter, clean the filter again.
 S 422-015-N00
 (5)  Install the start valve filter.
 TASK 80-11-04-402-016-N00
 4. Install the Start Valve Filter
______________________________
 A. Consumable Materials
 (1)  
D00341 Lubricant - Sanovac 5
　
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