AD Amdt-39-13337
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company CF34-3A1 | Airworthiness Directives; General Electric Company CF34-3A1, -3B, and -3B1 Turbofan Engines |
Unsafe Condition
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.
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Required Actions
Perform initial and repetitive visual inspections and cleaning of scavenge screens P/Ns 4047T95P01 and 5054T86G02 installed in the B-sump oil scavenge system. Install new screenless fittings or reworked fittings to remove the screens, in accordance with specified schedules.
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Compliance Time
Within 500 hours time-in-service (TIS) after the effective date of this AD, or within 1,000 hours time-since-last-shop-visit (TSLSV), whichever occurs first, for engines with more than 4,000 hours TSN. Prior to 4,500 hours TSN for engines with less than or equal to 4,000 hours TSN.
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Affected Aircraft
General Electric Company CF34-3A1, -3B, and -3B1 turbofan engines with scavenge screens P/Ns 4047T95P01 and 5054T86G02 installed in the B-sump oil scavenge system. These engines are installed on, but not limited to, Bombardier Inc. (Canadair) Model CL-600-2A12, CL-600-2B16, and CL-600-2B19 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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