AD 97-06-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM International, S.A. | CFM56-5 | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B1 | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B1/2P | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B1/P | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B2 | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B2/2P | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B2/P | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B3/2P | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B3/P | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
| engine | CFM International, S.A. | CFM56-5B4 | Airworthiness Directives; CFM International CFM56-5, -5B, and -5C Series Turbofan Engines |
Unsafe Condition
Rub or scratches on the stage 1 disk bore of the high pressure compressor rotor (HPCR) stage 1-2 spool due to contact with the stationary number 3 bearing aft air/oil seal, which could result in failure of the stage 1 disk and uncontained engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the stage 1 disk of the HPCR stage 1-2 spool via borescope inspections per specified service bulletins. Replace spools with rubbed or scratched disks with serviceable parts. Remove and replace stationary number 3 bearing aft air/oil seals (P/N 1364M71G02) with serviceable parts as terminating action.
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Compliance Time
Prior to accumulating 2,200 cycles since new (CSN) or cycles since last inspection (CSLI), depending on prior inspection status. For seals, removal and replacement required at the next engine shop visit after the effective date of this AD.
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Affected Aircraft
CFM International CFM56-5, -5B, and -5C series turbofan engines, installed on but not limited to Airbus A320, A321, and A340 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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