AD 87-23-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-45A | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-45A2 | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-50A | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-50C | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-50C1 | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-50C2 | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-50C2B | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-50C2D | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-50CA | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
| engine | General Electric Company | CF6-50E | GENERAL ELECTRIC Models CF6-50 and -45 Series Engines |
Unsafe Condition
Failure of the high pressure turbine (HPT) impeller spacer may cause an uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Eddy current inspect impeller spacers with specified part numbers according to GE SB 72-906. Remove and replace cracked spacers. Reinspect spacers at intervals not exceeding 2,500 cycles since last inspection. After October 30, 1990, remove spacers at next shop visit or within 2,500 cycles since last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance is required as indicated, unless already accomplished. Specific compliance times vary based on cycles since new (CSN) on the effective date (November 5, 1987) and include deadlines like 300 cycles in service (CIS) from the effective date, 600 CIS, 900 CIS, 1,200 CIS, 2,000 CIS, or prior to specific CSN thresholds.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric CF6-45A, CF6-45A2, CF6-50A, CF6-50C, CF6-50C1, CF6-50C2, CF6-50C2B, CF6-50C2D, CF6-50CA, and other CF6-50 and -45 series engines as listed.
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.