# Proposed AD 2001-NE-21-AD: General Electric Company CF34-3A1, -3B, and -3B1 Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-19-02
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 8, 2003, 68 FR 40573
- Comments due: September 8, 2003
- Became: [AD 2001-19-02](https://openairdocs.org/ad/2001-19-02)
- Docket: 2001-NE-21-AD
- FR document: 03-17178
- Official PDF: https://openairdocs.org/files/sha256/b1/6c/b16ccc8069cf31a48f5d9e0615502f09ea8e0d446228c1aa4703629545417254 (from https://www.govinfo.gov/content/pkg/FR-2003-07-08/pdf/03-17178.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/07/08/03-17178/airworthiness-directives-general-electric-company-cf34-3a1--3b-and--3b1-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7CF1100A7FC0864786256D5D004C588E.0001
- Page: https://openairdocs.org/proposed/2001-NE-21-AD

## Summary

The Federal Aviation Administration (FAA) proposes to revise an existing airworthiness directive (AD) applicable to General Electric Company (GE) CF34-3A1, -3B, and -3B1 turbofan engines with scavenge screens part numbers (P/Ns) 4047T95P01 and 5054T86G02 installed in the B-sump oil scavenge system. That AD currently requires initial and repetitive visual inspections and cleaning of the B-sump scavenge screens until a screenless fitting is installed. This proposal requires the same initial and repetitive visual inspections and cleaning of the B-sump scavenge screens until a screenless fitting is installed. This proposal also corrects a typographical error, and introduces a less restrictive terminating action schedule. This proposal is prompted by the need to correct a typographical error and by the need to introduce a less restrictive terminating action schedule. The actions specified by the proposed AD are intended to prevent B-sump scavenge screen blockage due to coking whichcould result in ignition of B-sump oil in the secondary air system, fan drive shaft separation, and uncontained engine failure.

## Notices in this docket

- Jul 8, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-17178, comments due Sep 8, 2003 (https://www.federalregister.gov/documents/2003/07/08/03-17178/airworthiness-directives-general-electric-company-cf34-3a1--3b-and--3b1-turbofan-engines)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.