AD Amdt-39-11424
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | JT9D Series | Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines |
Unsafe Condition
Rupture of 14th and 15th stage high pressure compressor (HPC) disks, which could result in an uncontained engine failure and damage to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect 14th and 15th stage HPC disks for cracks using Eddy Current Inspection (ECI) procedures specified in Nondestructive Inspection Procedure No. 858 (NDIP-858), attached to applicable service bulletins. Remove and replace cracked disks with serviceable parts prior to further flight. Inspections must be performed at specified intervals based on cycles since new (CSN) and cycles in service (CIS) since the last shop visit.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within specified intervals based on CSN and CIS since the last shop visit, as detailed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT9D-59A, -70A, -7Q, -7Q3, and JT9D-7R4 series turbofan engines with specific 14th and 15th stage HPC disks installed (Part Numbers listed in the AD). These engines are installed on but not limited to Airbus A300 and A310 series, Boeing 747 and 767 series, and McDonnell Douglas DC-10 series aircraft.
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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