73-11-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 416-025-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU CLOSE THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  
Close the thrust reversers (AMM 78-31-00/201).

 S 416-026-N00

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

 S 416-027-N00

 (3)  
Close the fan cowl panels (AMM 71-11-04/201).

 S 446-028-N00

 (4)  
Do the activation procedure for the thrust reversers (AMM 78-31-00/201).

 TASK 73-11-00-796-005-N00
 3. Fuel Distribution System Inspection for Leaks (Fig. 601)
_____________________________________________
 A. Special Tools and Equipment
 (1)  
PWA 85579 - Adapter, Pratt & Whitney, Commercial Products Division, 400 Main Street, East Hartford, CT 06108

 B.
Standard Tools and Equipment

 (1)  
Air Supply - 95-105 psi (655-725 kPa) pressure regulated

 C.
Consumable Materials

 (1)  
D00250 Petrolatum White, VV-P-236

 (2)  
G00835 Leak Check - Bubble Type

 D.
References

 (1)  
AMM 71-11-04/201, Fan Cowl Panels

 (2)  
AMM 71-11-06/201, Core Cowl Panels

 (3)  
AMM 73-11-04/401, Fuel Distribution-Valve Strainer

 (4)  
AMM 78-31-00/201, Thrust Reverser System

 E.
Access

 (1)  
Location Zone 412 Engine 1 - HPC Case 4 o'clock, Diffuser/Combustor Case 422 Engine 2 - HPC Case 4 o'clock, Diffuser/Combuster Case 432 Engine 3 - HPC Case 4 o'clock, Diffuser/Combustor Case 442 Engine 4 - HPC Case 4 o'clock, Diffuser/Combustor Case

 (2)  
Access Panel 415 and 416 Thrust Reverser Halves - Engine 1 425 and 426 Thrust Reverser Halves - Engine 2 435 and 436 Thrust Reverser Halves - Engine 3 445 and 446 Thrust Reverser Halves - Engine 4

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
SEE  A  FUEL PUMP  SEE  B 
MAIN GEARBOX (REF)  FWD 
A 

MAIN FUEL 
SUPPLY HOSE 
(REF)  PACKING 
FUEL DISTRIBUTION 
VALVE STRAINER  BOLT 
(4 LOCATIONS)

ADAPTER
PACKING
FUEL FWD
DISTRIBUTION VALVE
B
Fuel Distribution System Leak Check Figure 601
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
F. Prepare for the Inspection
 S 016-029-N00
 (1)  Open the fan cowl panels (AMM 71-11-04/201).
 S 046-030-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______
 OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF
 THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO
 EQUIPMENT.

 (2)  
Do this procedure: Thrust Reverser Deactivation for Ground
 Maintenance (AMM 78-31-00/201).

 S 016-031-N00

 (3)  
Open the core cowl panels (AMM 71-11-06/201).

 S 016-032-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______
 THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS,
 INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.

 (4)  
Open the thrust reversers (AMM 78-31-00/201).

 G.
Procedure

 S 016-019-N00
 (1)  
Remove the strainer from the fuel distribution valve
　
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