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Questions and Answers
What is the maximum permissible free-play at the trim tab trailing edge?
What is the maximum permissible free-play at the trim tab trailing edge?
- 0.75 inches
- 2.0 inches
- 1.5 inches
- .112 inches (correct)
What should be done if the trim tab free-play is found to be less than the permissible limit?
What should be done if the trim tab free-play is found to be less than the permissible limit?
- Adjust the actuator assembly.
- Check for looseness in the associated components.
- No action is needed. (correct)
- Remove and replace the trim tab.
Which components should be checked for looseness if the trim tab free-play exceeds the permissible limit?
Which components should be checked for looseness if the trim tab free-play exceeds the permissible limit?
- The trim tab hydraulic fluid level.
- The push-pull tube to the trim tab horn assembly attachment. (correct)
- The elevator control surfaces.
- The elevators and rudder assembly.
What should be done if looseness is found at the actuator assembly threaded rod end?
What should be done if looseness is found at the actuator assembly threaded rod end?
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What initial position should the elevators and trim tab be in before performing the free-play inspection?
What initial position should the elevators and trim tab be in before performing the free-play inspection?
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Study Notes
Trim Tab Free-Play Inspection
- Ensure elevators and trim tabs are in the neutral position
- Move the trim tab trailing edge up and down using moderate pressure
- Maximum allowable free-play is 1.12 inches measured at the trim tab trailing edge
- Trim tab free-play within 1.12 inches is considered within limits
- If free-play exceeds 1.12 inches, inspect the following for looseness:
- Push-pull tube to the trim tab horn assembly attachment
- Push-pull tube to the actuator assembly threaded rod end attachment
- Actuator assembly threaded rod end
- Replace damaged parts if looseness is found in the push-pull tube connections
- Refer to paragraphs 9-6 through 9-7C if looseness is found in the actuator assembly threaded rod end
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