# Airworthiness Directives; General Electric Company (GE) CF34-3A1, -3B, and -3B1 Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2001-09-24 · Effective 2001-10-09 · 66 FR 48789
## Document
- **Document number:** 01-23323
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 66 FR 48789
- **Publication date:** 2001-09-24
- **Effective date:** 2001-10-09
- **FAA docket:** Docket No. 2001-NE-21-AD
## Abstract

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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/09/24/01-23323/airworthiness-directives-general-electric-company-ge-cf34-3a1--3b-and--3b1-turbofan-engines)
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