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Control Package Null Leakage 
(No. 1 ) -(No. 4 )______ ______  = 4A ______ 
Flow No. 5A, Left INBD Elevator Control 
Package Null Leakage 
(No. 5(No. 1 )) -______ ______  = 5A ______  1.06 GPM 
Flow No. 5B, Lower Rudder Control Package 
Null Leakage 
(No. 5A) -(No. 4A )______ ______  = 5B ______  1.06 GPM 
Flow No. 6A, Null Leakage of Left Central 
Lateral Control Package, Right INBD Aileron 
Power Package, Left OUTBD Aileron Power 
Package, and Internal Leakage Other Than 
Valve Null Leakage in Spoilers 2,3,10,11 
) -(No. 6 )(No. 1 ____________  = 6A ______ 

Airplane No.________
Hours ________

Hydraulic System No. 2 Internal Leakage Test Data and Analysis Sheet
Figure 603 (Sheet 1)

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A
747-400
MAINTENANCE MANUAL

Airplane No.________
Hours ________

Maximum 
_____________________________________________Determine Individual Component Leakage Values:  Actual  Recommended 
Flow___________  Flow_____________ 
Flow No. 8A, Right INBD Aileron Power Package 
Null Leakage 
(No. 7 ) -(No. 8 )______ ______  = 8A ______  0.66 GPM 
Flow No. 9A, Left OUTBD and Right INBD Aileron 
Power Package Null Leakage 
(No. 9 )(No. 7 ) -______ ______  = 9A ______ 
Flow No. 9B, Left OUTBD Aileron Power Package 
Null Leakage 
(No. 9A ) -______(No. 8A )______  = 9B ______  0.66 GPM 
Flow No. 11A, Spoiler Package 2 and 3 Internal 
Leakage 
(No. 10 ) -)(No. 11 ____________  = 11A______  0.8 each GPM 
Flow No. 12A, Spoiler Package 10 and 11 
Internal Leakage 
(No. 7 ) -)(No. 12 ____________  = 12A______  0.8 each GPM 
Flow No. 14A, Left Central Lateral Control 
Package Null Leakage 
(No. 13 ) -(No. 14 )____________  = 14A______  0.53 GPM 

Hydraulic System No. 2 Internal Leakage Test Data and Analysis Sheet
Figure 603 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

GROUND
SERVICE
DISCONNECT

PRV - PRESSURE RELIEF VALVE SOV - SUPPLY SHUTOFF VALVE
Hydraulic System 2 Schematic
Figure 604

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747-400 MAINTENANCE MANUAL
 TASK 29-11-00-706-138
 8. Hydraulic System No. 3 - Full Internal Leakage Check
____________________________________________________
 A. Special Tools and Equipment
 (1)  
4MIT65B80307-1 - Protractor

 (2)  
3MIT65B80307-1 - Control Wheel Adapter

 B.
Standard Tools and Equipment

 (1)  
410DME-10AR Flowmeter (commercially available)
 ACL Technologies Inc.
 Santa Clara, CA 92705-5419

 

 -
It must be able to pass a flow of 32 gpm at 3000 psig without damage.

 -
It must measure a flow of 0.25 to 7.50 gpm with a precision of | 0.5% of the reading.

 C.
References

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

 (2)  
AMM 27-51-00/201, Trailing Edge Flap Systems

 (3)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (4)  
AMM 29-11-23/201, Pressure Filter Module

 (5)  
　
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本文鏈接地址：747-400 AMM 飛機維護手冊 液壓 HYDRAULIC 1(63)