(6)  
AMM 71-11-06/201, Core Cowl Panel

 (7)  
AMM 78-31-00/201, Thrust Reverser System

 (8)  
IPC 75-23-02 Fig. 1

 (9)  
WDM 75-23-11, 75-23-21

 (10)
 SSM 75-23-01

 C.  
Access

 (1)  
Location Zone

 415 Engine 1 - Inner Wall of Left Thrust Reverser Half 425 Engine 2 - Inner Wall of Left Thrust Reverser Half 435 Engine 3 - Inner Wall of Left Thrust Reverser Half 445 Engine 4 - Inner Wall of Left Thrust Reverser Half 451 Strut No. 1 - Forward Fairing 461 Strut No. 2 - Forward Fairing 471 Strut No. 3 - Forward Fairing 481 Strut No. 4 - Forward Fairing 452 Strut No. 1 - Torque Box 462 Strut No. 2 - Torque Box 472 Strut No. 3 - Torque Box 482 Strut No. 4 - Torque Box
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////

LOCKING PIN FOR THE

(SHOWN IN OPEN POSITION)

Nacelle Zone Ventilation System Test
Figure 501 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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

START VALVE ACCESS DOOR FORCONNECTOR, DV351 THE TAI VALVE
SEE D
C
BAROMETRIC SWITCH
VENT PORT PLUG
FWD
D
Nacelle Zone Ventilation System Test Figure 501 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(2) Access Panel
 415 Left Thrust Reverser Half - Engine 1 425 Left Thrust Reverser Half - Engine 2 435 Left Thrust Reverser Half - Engine 3 445 Left Thrust Reverser Half - Engine 4 451AR TAI Valve Access Door - Strut 1 461AR TAI Valve Access Door - Strut 2 471AR TAI Valve Access Door - Strut 3 481AR TAI Valve Access Door - Strut 4 452FL Mid Lower Strut Aft Access Door - Strut 1 462FL Mid Lower Strut Aft Access Door - Strut 2 472FL Mid Lower Strut Aft Access Door - Strut 3 482FL Mid Lower Strut Aft Access Door - Strut 4

Figure 502
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D. Preconditions
 S 865-024-N00
 (1)  
These conditions are necessary for this task:

 (a)  
Electrical Power on (AMM 24-22-00/201).

 (b)  
Integrated Display System (IDS) serviceable (AMM 31-61-00/501).

 (c)  
Pneumatic power available (AMM 36-00-00/201).

 E.
Procedure

 S 865-002-N00
 (1)  For the applicable engine, open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) 6F14 ENG 1 EEAC
 2) 6E14 ENG 2 EEAC
 3) 6D14 ENG 3 EEAC
 4) 6C14 ENG 4 EEAC

 S 015-026-N00
 (2)  Open the left fan cowl panel (AMM 71-11-04/201).
 S 045-027-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.
 (3)  
Do this procedure: Thrust Reverser Deactivation for Ground
 Maintenance (AMM 78-31-00/201).
　
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