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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 IDG QUICK ATTACH-DETACH (QAD) RING - INSPECTION/CHECK
_____________________________________________________
 1.  General_______
 A.  This procedure has three tasks. The first task is a visual inspection of the quick attach-detach (QAD) ring for the integrated drive generator (IDG). You must do an inspection of the QAD ring before you install the IDG. The task also includes a check of the tension bolt torque with the IDG removed.
 B.  The second task is a check of the tension bolt torque with the IDG installed.
 C.  The third task is a check of the tension bolt distance with the IDG installed. This check measures the quantity of worn areas on the QAD ring and the mounting flange.
 D.  The IDG QAD ring is installed on the aft face of the main gearbox at the 7 o'clock position.
 TASK 24-11-08-206-001
 2.  IDG Quick Attach-Detach (QAD) Ring Inspection (Fig. 601)_____________________________________________
 A.  Special Tools and Equipment
 (1)  
900-24999 - Fixture, Simulated IDG Input Flange Inspection Plate, Hamilton Sundstrand, 4747 Harrison Avenue, P.O. Box 7002, Rockford, IL 61125

 B.  
Standard Tools and Equipment

 (1)
Mallet - Soft (rubber, fiber, or equivalent)

 C.  
References

 (1)
AMM 24-11-08/401, IDG Quick Attach-Detach (QAD) Ring

 D.  
Access

 (1)  
Location Zone 412 Engine 1 - Main Gearbox Aft Face 7 o'clock 422 Engine 2 - Main Gearbox Aft Face 7 o'clock 432 Engine 3 - Main Gearbox Aft Face 7 o'clock 442 Engine 4 - Main Gearbox Aft Face 7 o'clock

 (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

 E.  
Procedure

 (1)
Remove the IDG (AMM 24-11-01/401).

 S 216-003

 (2)
Examine the QAD ring for nicks and burrs.

 (a)
Remove all metal burrs with a file.

 S 016-002
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 ALL  ú ú 02 Page 601 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

SEE A
IDG QAD RINGMAIN GEARBOX SEE BCLAMPING TRACK AREA
VIEW LOOKING FORWARD
A
QAD RING SURFACE
TENSION QAD RINGBOLT NUTS ALIGNMENT MARKS (CLOSED POSITION)
QAD CLOSED POSITION
QAD OPEN
TAP RING WITHIN

POSITION
THIS AREA ONLY

B
IDG Quick Attach-Detach (QAD) Ring Inspection
Figure 601 (Sheet 1)

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 24-11-08
 ALL  ú ú 02 Page 602 ú Feb 10/89
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
RING  RING
LUG

LUG

UNACCEPTABLE
ACCEPTABLE
(LUG CENTERLINE OUTSIDE
(LUG CENTERLINE IN GREEN
YELLOW OR GREEN BAND)
OR YELLOW BAND)

A-A
IDG QAD RING AND ADAPTER PLATE ALLOWABLE WEAR

IDG QAD RING AND IDG MOUNTING FLANGE WEAR ALLOWANCE
IDG Quick Attach-Detach (QAD) Ring Inspection
Figure 601 (Sheet 2)

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 24-11-08
 ALL  ú ú 01 Page 603 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 216-004
 (3)  
Examine the QAD ring, the tension bracket, the tension bolt nuts, and the tension bolt for damage.

 S 216-005

 (4)  
Examine the inner surface of the QAD ring along the clamp track area.

　
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