AD 49-40-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | JGS Properties, LLC | 11A | Airworthiness Directives; Luscombe Model 11A Aircraft |
Unsafe Condition
The elevator trim tab actuating horn may become disconnected from the trim tab, causing serious vibration of the horizontal tail surfaces.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Rework the trim tab horn attachment by adding two solid 24ST aluminum alloy blocks inside the inboard end of the trim tab, secured with AN 456AD4 rivets. Attach the horn through its regular holes using AN 456AD4 rivets and apply zinc chromate coating to the blocks.
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Compliance Time
on or before the next periodic inspection but not later than December 1, 1949
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Affected Aircraft
Luscombe Model 11A Aircraft, all serial numbers
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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