AD 88-06-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Aircraft Engines | CF34-1A | GENERAL ELECTRIC Model (GE) CF34-1A and -3A Engines |
| engine | General Electric Aircraft Engines | CF34-3A | GENERAL ELECTRIC Model (GE) CF34-1A and -3A Engines |
Unsafe Condition
Contamination of the fuel control causing engine flameout or uncommanded power roll-back and subsequent inflight shutdown.
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Required Actions
Replace the fuel control with a reworked unit having a redesigned bypass valve piston installed and cleaned internally per GE SB 73-5. Replace the bypass valve piston with redesigned hardware per GE SB 73-6. Comply with Canadair AFM Temporary Revisions for specific models.
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Compliance Time
Prior to further flight after the AD's effective date (March 23, 1988) for engines not using the AFM revisions. Within 500 hours in service from the effective date or prior to September 30, 1988, whichever is sooner, for engines using the AFM revisions.
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Affected Aircraft
General Electric CF34-1A and -3A engines installed in Canadair CL-600-2A12 and CL-600-2B16 aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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