(b) Apply a down force (by hand) to the trailing edge of the flap. Apply sufficient force to make the flap move through possible free movement in the flap system mechanism and joints.
NOTE : Do not apply too much force to cause the system
____ components, mechanism or the aircraft fixed structure to move or bend.
(c)
Hold the flap in this position, measure and record the dimension Z and then release the flap.
(d)
Apply an up force (by hand) to the trailing edge of the flap. Apply sufficient force to make the flap move through possible free movement in the flap system mechanism and joints.
NOTE : Do not apply too much force to cause the system
____ components, mechanism or the aircraft fixed structure to move or bend.
(e)
Hold the flap in this position, measure and record the dimension Y and then release the flap.
(f)
To find the total free movement, subtract the dimension Z from the dimension Y.
(10)
At the track 2 position, measure the total free movement of the actuator lever (dimension X):
(a)
Apply a down force (by hand) to the actuator lever. Apply sufficient force to make the actuator lever move through possible free movement in the flap system mechanism and joints.
(b)
Hold the actuator lever in this position, then measure and record the dimension T.
(c)
Apply an up force (by hand) to the actuator lever. Apply sufficient force to make the actuator lever move through possible free movement in the flap system mechanism and joints.
(d)
Hold the actuator lever in this position, then measure and record the dimension S.
(e)
To find the total free movement (dimension X), subtract the dimension S from the dimension T.
(11)
Install the aluminum pin through the joint where you removed the bolt (184).
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(12)
Retract the flaps fully (Ref. TASK 27-50-00-866-009).
(13)
Remove the aluminum pin.
(14)
At the track 2 position, temporarily connect the flap drive arm to the rotary actuator drive-lever as follows:
(a)
Install the bolt (184), the washer (185) and the nut (186).
(b)
Hand tighten the nut (186).
(15)
Compare the measured free movement dimensions:
-the maximum acceptable value of free movement at the inboard flap trailing edge at tracks 1 and 2 is 10.0 mm (0.3937 in.)
-for the maximum acceptable value of dimension X (free movement of the lever arm) refer to the table 601.
**ON A/C 051-099, 103-149, 201-299,
Subtask 27-54-00-220-050-A
A. Detailed Dimensional Check - Free Movement at the Trailing Edge of the Inboard Flap
(1) At the track 1 position, disconnect the flap drive arm from the rotary actuator lever-arm:
(a)
Remove and discard the cotter pin (176).
(b)
Remove the nut (177) and the washer (178).
(c)
Remove the bolts (183), the washers (182) and the indicator plate (181).
(d)
Remove the indicator pin (180).
(e)
Remove the shearbolt (179) and install the aluminum pin (3.0 mm (0.1181 in.) diameter).
NOTE : The diameter of the aluminum pin is approximately 6.0 mm
____ (0.2362 in.) less than the shearbolt (179) it replaces. The pin is 100 mm (3.9370 in.) long and is made locally from material LN 1798 3.1354T3511. The pin is temporary and has two functions:
-it keeps the joint together when you extend/retract the flaps
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-it is easy to remove the pin to disconnect the joint when the flaps are extended.
(f)
Extend the flaps manually (Ref. TASK 27-50-00-866-011) as follows:
(g)
Remove the aluminum pin.
1_ Slowly extend the flaps until the dimension T at track 2 is
approximately 6.0 mm (0.2362 in.).
2_ Dimension T can be +/- 1.0 mm (0.0393 in.) but it must be set
during the flap extension procedure. Do not retract the flaps
in small amounts to set the dimension T.
(2) At the track 2 position, measure the total free movement of the flap trailing edge:
(a)
Refer to step 4.A.(1)(f) and make sure that the flaps are extended correctly.
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