(a)  
Discard the packing.

 TASK 29-11-16-404-007
 3.  Acceleration Control Unit Installation (Fig. 401)______________________________________
 A. Special Tools and Equipment
 (1)  
ME60B00158 Air-Driven Hydraulic Pump Muffler

 B.
Consumable Materials

 (1)  
D00071 Oil - Aircraft Turbine Engine Lubricating, MIL-L-7808 (optional to MIL-L-23699)

 (2)  
D00068 Oil - Aircraft Turbine Engine Lubricating, MIL-L-23699 (optional to MIL-L-7808)

 (3)  
G00095 Detector - Leak, Leak Tek (160X)

 C.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 29-11-08/401, Air-Driven Pump Turbine Drive

 (3)  
AMM 36-00-00/201, Pneumatic System

 (4)  
AMM 54-62-00/201, Nacelle Strut Access Panels

 (5)  
IPC 29-11-41 Fig. 1

 D.
Access

 (1)  
Location Zone
 454 System 1 - Strut Aft Fairing
 484 System 4 - Strut Aft Fairing

 (2)  
Access Panel
 454A Trailing Edge Fairing Doors - System 1
 484A Trailing Edge Fairing Doors - System 4

 E.
Procedure

 S 434-024
 (1)  
Install the reducer:

 (a)  
Lubricate the new packing with engine oil.

 (b)  
Install the packing on the reducer.

 (c)  
Install the reducer in the pressure port for the control air on the accelerator control unit.

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A
747-400 MAINTENANCE MANUAL
 S 424-027
 (2)  
Install the acceleration control unit:

 (a)  
Put the acceleration control unit in its position on the mounting bracket.

 (b)  
Install the three mounting bolts, the bushings, the washers, and the nuts. 1) Tighten the nuts.

 (c)  
Connect the pressure tube for the control air to the
 acceleration control unit.

 S 414-011
 (3)  
Install the ADP turbine drive (AMM 29-11-08/401).

 S 794-025

 (4)  
Do a test of the control unit installation:

 (a)  
Supply electrical power (AMM 24-22-00/201).

 (b)  
Install the ADP muffler on the turbine exhaust.

 (c)  
Apply the leak detector to the fitting on the accelerator control unit.

 (d)  
Supply pressure to the pneumatic system (AMM 36-00-00/201).

 (e)  
Put the applicable HYD DEMAND switch on the P5 panel in the ON position.

 (f)  
Examine the fitting for leakage.
 1) If you find leakage, repair the cause of it.

 (g)  
Put the HYD DEMAND switch in the OFF position.

 (h)  
Release the pressure in the pneumatic system
 (AMM 36-00-00/201).

 (i)  
Remove the ADP muffler.

 S 414-021
 CAUTION: MAKE SURE YOU LATCH THE FAIRING DOORS ON THE TRAILING EDGE
_______ CORRECTLY. DAMAGE CAN OCCUR IF THE DOORS OPEN DURING A FLIGHT.
 (5)  
Close the fairing doors on the trailing edge of the strut (AMM 54-62-00/201).

 S 864-022

 (6)  
Remove electrical power if it is not necessary for other operations (AMM 24-22-00/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 AIR-DRIVEN PUMP - REMOVAL/INSTALLATION
______________________________________
 1.  General_______
 A.  This procedure contains the tasks to remove and install the air-driven pump (ADP). The installation task also contains a test of the ADP installation.
　
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