AD 2006-17-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | JT8D-1 | Airworthiness Directives; Pratt & Whitney JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, -11, -15, -15A, -17, -17A, -17R, -17AR, -209, -217, -217A, -217C, and -219 Turbofan Engines |
Unsafe Condition
Cracking in HPC front hubs and HPC disks coated with PWA 110-21 coating, which could result in a rupture of the HPC front hub or HPC disk, leading to an uncontained engine failure and damage to the airplane.
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Required Actions
Replace HPC front hubs and HPC disks that have operated with PWA 110-21 coating and operated in certain engine models, or visually inspect and perform FMPI for cracking of those parts and re-plate them if they pass inspection. Add JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, -11, -15, -15A, -17, -17A, -17R, and -17AR engines to the applicability.
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Compliance Time
Before further flight
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Affected Aircraft
Pratt & Whitney JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, -11, -15, -15A, -17, -17A, -17R, -17AR, -209, -217, -217A, -217C, and -219 turbofan engines with HPC front hubs and HPC disks that have operated at any time with PWA 110-21 coating.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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