(e)
Tighten the QAD tension bolt to 240-264 pound-inches (27.1-29.8 N.m).
(f)
Measure the distance between the ring lug and the bracket on the QAD ring. If the distance is less than 0.562 inch
(14.28 mm), replace the QAD coupling (AMM 24-11-03/401).
NOTE: You can measure the distance between the centers of the
____ nuts in the QAD coupling tension bolt assembly. If the distance is less than 1.750 inches (44.45 mm), replace the QAD coupling.
(g) Remove the simulated IDG input flange inspection plate if it is installed.
TASK 24-11-03-206-002
3. Check the QAD Coupling Torque (Fig. 601)_____________________________
A. References
(1) AMM 71-11-04/201, Fan Cowl Panels
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Quick-Attach/Detach Coupling
Figure 601
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B. Access
(1)
Location Zones
410/420 Power Plant Nacelles
(2)
Access Panels
413/423 Fan Cowls (Left)
414/424 Fan Cowls (Right)
C. Prepare to check the QAD coupling torque.
S 016-004
(1) Open the fan cowl panels (AMM 71-11-04/201).
D. Procedure
S 216-005
(1) Make a check of the torque value as follows:
(a) Remove the lockwire from the QAD coupling tension bolt.
CAUTION: MAKE SURE THAT THE QAD RING DOES NOT BIND OR CATCH WHILE
_______ YOU TIGHTEN THE TENSION BOLT. THIS CAN CAUSE DAMAGE TO THE QAD RING.
(b) Tap the edge of the QAD ring with a brass drift to adjust the ring and to prevent incorrect torque values.
NOTE: Tap the edge of the ring from the 4 O'clock to 7 O'clock
____
position.
(c) Measure the torque on the tension bolt.
1) If the torque is more than 180 pound-inches (20.3 N.m), do these steps: a) Tighten the tension bolt to a torque of 240-264
pound-inches (27.1-29.8 N.m). b) Secure the tension bolt with lockwire.
2) If the torque is less than 180 pound-inches (20.3 N.m), do these steps: a) Tighten the tension bolt to a torque of 240-264
pound-inches (27.1-29.8 N.m).
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b) Tap the QAD ring again and measure the torque on the tension bolt.
c) If the torque is less than 180 pound-inches (20.3 N.m) again, tighten the bolt to the torque of 240-264 pound-inches (27.1-29.8 N.m) and tap the ring. Do this step again until the torque does not drop below 180 pound-inches (20.3 N.m) after you tap the QAD ring.
d) Tighten the tension bolt to a torque of 240-264 pound-inches (27.1-29.8 N.m).
e) Secure the tension bolt with lockwire.
S 416-006
(2) Close the fan cowl panels (AMM 71-11-04/201).
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IDG AIR/OIL HEAT EXCHANGER - REMOVAL/INSTALLATION
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