AD 90-19-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-6D | GENERAL ELECTRIC COMPANY Model CF6-6 Engines |
| engine | General Electric Company | CF6-6D1 | GENERAL ELECTRIC COMPANY Model CF6-6 Engines |
| engine | General Electric Company | CF6-6D1A | GENERAL ELECTRIC COMPANY Model CF6-6 Engines |
| engine | General Electric Company | CF6-6K | GENERAL ELECTRIC COMPANY Model CF6-6 Engines |
| engine | General Electric Company | CF6-6K2 | GENERAL ELECTRIC COMPANY Model CF6-6 Engines |
Unsafe Condition
Low cycle fatigue (LCF) failure of the low pressure turbine rotor (LPTR) stage one disk, LPTR stage two disk, and LPTR forward shaft could result in uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service specified LPTR stage one disks and forward shafts based on their cycles since new (CSN) and compliance schedules. Replace LPTR stage two disks with approved versions during LPTR overhaul or before exceeding retirement cycles.
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Compliance Time
Compliance required as indicated in the AD, with specific schedules based on cycles since new (CSN) and compliance deadlines up to 4,500 cycles in service (CIS) after the effective date (October 15, 1990).
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Affected Aircraft
General Electric Company CF6-6 engines (models CF6-6D, CF6-6D1, CF6-6D1A, CF6-6K, CF6-6K2) installed on, but not limited to, McDonnell Douglas DC-10-10 aircraft.
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
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