Hangar 9 P-51D 1.50 ARF Assembly Manual page 25

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. .Step 5
Firmly.grasp.the.elevator.and.stabilizer.and.gently.pull.
them.apart.to.ensure.the.hinges.are.secure.and.cannot.be.
pulled.apart..Use.caution.when.gripping.them.to.avoid.
crushing.the.structure.
Section 6: Hinging the Elevators
 
. .Step 6
Work.the.elevator.up.and.down.several.times.to.work.in.
the.hinges.and.check.for.proper.movement.

.Step 7
Repeat.Steps.1.through.6.for.the.remaining.elevator.half.
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