Hangar 9 B25J Mitchell ARF Assembly Manual page 26

Section 4: Operation Flap Linkage Installation
Step 12
Adjust the position of the clevises so the flaps are aligned
with the trailing edge of the wing when the flap servo is in
the up position. Use the heat shrink tubing and heat gun
to make sure the clevises will not become disconnected
from the flap control horns. Be careful not to damage the
covering.
Step 13
Repeat Steps 1 though 10 for the remaining flap linkage.
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