Podcast
Questions and Answers
What is the maximum permissible free-play measurement at the trim tab trailing edge?
What is the maximum permissible free-play measurement at the trim tab trailing edge?
- .112 inches (correct)
- 1/2 inch
- 1 inch
- 2 inches
What should be checked if the trim tab free-play exceeds 112 inches?
What should be checked if the trim tab free-play exceeds 112 inches?
- The weight of the trim tab assembly
- The trim tab design specifications
- The actuator system pressure
- The push-pull tube connections (correct)
What is the first step to inspect trim tab free-play?
What is the first step to inspect trim tab free-play?
- Check for cracks in the trim tab
- Measure the trim tab angle
- Place elevators and trim tab in the neutral position (correct)
- Tighten all hardware around the trim tab
If looseness is found in the actuator assembly threaded rod end, what should be done?
If looseness is found in the actuator assembly threaded rod end, what should be done?
What action should be taken if a push-pull tube connection shows looseness during inspection?
What action should be taken if a push-pull tube connection shows looseness during inspection?
Flashcards
Max trim tab free-play
Max trim tab free-play
The maximum allowed movement of the trim tab, measured at the trailing edge. It should not exceed 0.112 inches.
High trim tab free-play cause
High trim tab free-play cause
Loose push-pull tube connections within the actuator assembly are the probable reason for excessive trim tab free-play.
Initial trim tab inspection step
Initial trim tab inspection step
First, you need to position the elevators and the trim tab at their neutral settings to start the free-play check.
Loose actuator rod end action
Loose actuator rod end action
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Loose push-pull tube repair
Loose push-pull tube repair
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Study Notes
Trim Tab Free-Play Inspection
- Begin by positioning both the elevators and the trim tab in their neutral positions.
- Manually move the trim tab trailing edge up and down using moderate pressure to assess free-play.
- The maximum permissible free-play measured at the trim tab trailing edge is 112".
- A system with less than 112" of free-play is within acceptable limits.
- If the free-play exceeds 112", inspect the following components for looseness while manually manipulating the trim tab:
- The push-pull tube to trim tab horn assembly attachment.
- The push-pull tube to actuator assembly threaded rod end attachment.
- The actuator assembly threaded rod end for movement within the actuator assembly.
- If looseness is found in either the push-pull tube to trim tab horn assembly attachment or the push-pull tube to actuator assembly threaded rod end attachment, replace the affected components.
- If looseness is discovered in the actuator assembly threaded rod end movement, consult sections 9-6 through 9-7C for resolution.
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