AD 89-23-06 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM International, S.A. | CFM56-2 | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-2A | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-3 | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-3B | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-3C | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5 | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5-A1/F | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5A4 | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5A4/F | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5A5 | Airworthiness Directives; CFM International CFM56-2, -3, -3B, -3C, and -5 Series Turbofan Engines |
Unsafe Condition
No. 3 bearing failure and subsequent inflight engine shutdown.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the forward sump magnetic chip detector (MCD) within the next 50 or 75 hours time in service (TIS) after the AD's effective date, then at intervals not exceeding 50 or 75 hours TIS since last inspection, depending on engine series and bearing part numbers. Remove from service No. 3 bearings (specific part numbers) at the next shop visit or before January 31, 1998, whichever comes first. Removal of bearings terminates MCD inspection requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless accomplished previously.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
CFM International CFM56-2, -3, -3B, -3C, and -5 series turbofan engines installed on Airbus A319/A320, McDonnell Douglas DC-8, and Boeing 737 series 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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