AD 76-13-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | TSIO-520-L | TELEDYNE CONTINENTAL MOTORS Model TSIO-520-L Engines |
Unsafe Condition
Cracks in the left hand rear exhaust elbow, P/N 640708, and left and right hand flanges on the exhaust to turbo adapter, P/N 640712, and insufficient end clearance between connector tube assembly, P/N 640711, and connector tube, P/N 640710.
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Required Actions
Inspect for cracks and distortion in the exhaust components per specified steps. Replace cracked or distorted parts with new elbow P/N 642067 and flange P/N 642066 when available. Adjust or replace elbows to ensure gap between flanges is between 0.250 and 0.500 inches. Inspect turbo adapter wall thickness and replace if below 0.075 inches. Reinstall components with specified torque settings.
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Compliance Time
within the next ten hours time in service after the effective date of this AD
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Affected Aircraft
Teledyne Continental Motors Model TSIO-520-L engines with serial numbers 508000 through 508164, and 508166 through 508261.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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