AD Amdt-39-10830
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | JT9D Series | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
Unsafe Condition
Reports of disk bore cracks found during shop inspections on both the 14th and 15th stage high pressure compressor (HPC) disks, which could lead to disk rupture and uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Initial and repetitive eddy current inspections (ECI) of 14th and 15th stage HPC disks for cracks. Removal of cracked disks and replacement with serviceable parts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D series turbofan engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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