AD 82-09-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | TSIO-520-J | TELEDYNE CONTINENTAL MOTORS Model TSIO-520-NB, TSIO-520-J, TSIO- 520-K, and TSIO-520-N, and TSIO-520-NB engines. |
| engine | Continental Motors | TSIO-520-K | TELEDYNE CONTINENTAL MOTORS Model TSIO-520-NB, TSIO-520-J, TSIO- 520-K, and TSIO-520-N, and TSIO-520-NB engines. |
| engine | Continental Motors | TSIO-520-N | TELEDYNE CONTINENTAL MOTORS Model TSIO-520-NB, TSIO-520-J, TSIO- 520-K, and TSIO-520-N, and TSIO-520-NB engines. |
| engine | Continental Motors | TSIO-520-NB | TELEDYNE CONTINENTAL MOTORS Model TSIO-520-NB, TSIO-520-J, TSIO- 520-K, and TSIO-520-N, and TSIO-520-NB engines. |
Unsafe Condition
Fuel leak possibility due to damaged, cut, or chipped threads in the fuel pressure regulator's inlet and outlet, which could result in an engine compartment fire.
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Required Actions
Inspect fuel pressure regulator inlet and outlet for leaks and fuel stains. If leaks or stains exist, remove fuel fittings, inspect threads, replace damaged regulator or fittings, clean threads, apply sealant, and reinstall. If no leaks or stains, complete these actions within 10 hours of operation.
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Compliance Time
Prior to next flight (if leak/stain found) or within the next 10 hours of operation (if no leak/stain).
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Affected Aircraft
Teledyne Continental Motors TSIO-520-J, TSIO-520-K, TSIO-520-N, TSIO-520-NB engines with specified serial numbers for new and rebuilt engines.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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