(d)
Do a check of the wear surfaces of the parts with a micrometer or vernier caliper as applicable (Fig. 601).
(e)
Compare the dimensions measured with the permitted dimensions shown in Fig. 601.
(f)
Repair or replace the parts that are not in the tolerance specified in Fig. 601.
(g)
Connect the ballnut to the gimbal.
3. Flap Drivescrew Backlash Test (Fig. 602)
A. Special Tools and Equipment
(1) C27030-33 – Flap Drivescrew Backlash Tool
B. References
(1)
AMM 24-22-0/201, Manual Control
(2)
AMM 27-51-0/201, Trailing Edge Flaps
(3)
AMM 27-51-141/401, Inboard Flap Track Fairing
(4)
AMM 27-51-121/401, Outboard Flap Track Fairings
(5)
AMM 27-51-73/401, Flap Drivescrew
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500 Flap Drivescrew Wear Limits
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C. Access
(1) Location Zone
307, 407 Wing Trailing Edge Outboard Flap and Spoiler
309, 409 Wing Trailing Edge Inboard Flap and Spoiler
D. Prepare for the Flap Drivescrew Backlash Check
(1)
Supply electrical power (AMM 24-22-0/201).
(2)
Do the applicable steps that follow to get access to the flap drivescrew:
(a)
Remove the center fairing (AMM 27-51-121/401) to get access for the positions that follow: 1) Position No. 1 2) Position No. 2 3) Position No. 7 4) Position No. 8
(b)
Remove the tailcone assembly (the aft part of the fairing for the outboard track of the inboard flap) to get access to the positions that follow: 1) Position No. 3 2) Position No. 6
(c)
Remove the fairing for the inboard track of the inboard flap to access for the positions that follow (AMM 27-51-141/401): 1) Position No. 4 2) Position No. 5
(3)
Supply hydraulic power (AMM 27-51-0/201).
(4)
Do the steps that follow to put the flaps in the correct position to do the check of the flap drivescrew backlash:
NOTE: You must have approximately 4 inches of the drivescrew aft of the ballnut to let you install the lever and clamp tool (these are part of the drivescrew backlash test tool kit).
(a)
To do the check at the No. 1, No. 2, No. 7 or No. 8 position, do the steps that follow to put the flaps at the 25 unit position: 1) Move the flap handle on the control stand to the 25 unit position. 2) Make sure the flaps move to the 25 unit position.
(b)
To complete a check at the No. 3 or No. 6 position, do the steps that follow to put the flaps to the 30 unit position: 1) Move the flap handle on the control stand to the 30 unit position. 2) Make sure that the flaps move to the 30 unit position.
(c)
To complete the check at the No. 4 or No. 5 position, do the steps that follow to put the flaps to the 25 or the 30 unit position: 1) Move the flap handle on the control stand to the 25 or the 30 unit position. 2) Make sure that the flaps move to the specified position.
(5)
Remove the hydraulic power (AMM 27-51-0/201).
(6)
Do the locking procedure for the drive system of the trailing edge flaps
(AMM 27-51-0/201).
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