Airworthiness Directive 01-23323
recurringAirworthiness Directives; General Electric Company (GE) CF34-3A1, -3B, and -3B1 Turbofan Engines
What this AD requires
This amendment adopts a new airworthiness directive (AD) that is applicable to GE CF34-3A1, -3B, and -3B1 turbofan engines with scavenge screens part numbers (P/N's) 4047T95P01 and 5054T86G02 installed in the B-sump oil scavenge system. This action requires initial and repetitive visual inspections and cleaning of the B-sump scavenge screens. This amendment is prompted by five reports of B-sump oil scavenge system failure causing engine in-flight shutdowns. The actions specified in this AD are intended to prevent B-sump scavenge screen blockage due to coking, which could result in ignition of B-sump oil in the secondary air system, fan drive shaft separation, and uncontained engine failure.
Which aircraft AD 01-23323 applies to
Applies to CF34 series turbofan engines with B-sump oil scavenge screens P/N 4047T95P01 and/or P/N 5054T86G02 installed, per GE Aircraft Engines Alert SBs CF34-AL 79-A0014 Rev 1 and CF34-BJ 79-A0015 Rev 1; initial/repetitive inspection and cleaning intervals vary by engine hours since new/since last shop visit and whether coking is found.
Whether AD 01-23323 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.