AD 57-12-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | CONVAIR Model 340 Aircraft |
Unsafe Condition
Cracks occurring in the spar of the left-hand elevator in the area of the cutouts for the tab controls, originating near the bolts attaching the support bracket for the tab control idler and extending to a corner of the spar cutouts. Cracks also reported in angles P/N 340-2210114-10 and -111 above and below the spar openings.
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Required Actions
Inspect the left-hand elevator spar for cracking near the tab control idler attachment bolts and spar cutouts. Repair cracks before next flight if found. Reinforce the spar vicinity of the tab control idler attachment using Convair Service Airgram No. 212 sections 8 and 9, regardless of crack presence.
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Compliance Time
As soon as possible but not later than the next 100 hours of operation unless already accomplished and at each 250 hours of operation thereafter.
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Affected Aircraft
All Model 340 Aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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