AD 89-24-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | TSIO-520-UB | TELEDYNE CONTINENTAL MOTORS (TCM) Model TSIO-520-UB Engines |
Unsafe Condition
Cracking of the turbocharger inlet assembly part number 642668, especially in the weld joints just above the turbine inlet temperature boss, which could result in engine compartment fire.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect turbocharger inlet assembly P/N 642668 for cracks in the weld joints. If a crack is found, replace P/N 642668 with P/N 646795. Make log book entry showing compliance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next 100 hour inspection or annual inspection, or within 100 flight hours, whichever occurs first after the effective date of this AD, and thereafter at intervals not to exceed 100 flight hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
TCM Model TSIO-520-UB engines, serial numbers 515000 thru 515999 and 527000 thru 527070, and all remanufactured/overhauled engines of this model with P/N 642668 turbocharger inlet assembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.