# Proposed AD 98-ANE-72-AD: Honeywell International Inc., (Formerly AlliedSignal, Inc., Formerly Textron Lycoming, Formerly Avco Lycoming) T5311A, T5311B, T5313B, T5317A, T5317A-1, T5317B Series Turboshaft Engines and Lycoming Former Military T53-L-11B, T53-L-11D, T53-L-13B, T53-L-13B/D, and T53-L-703 Series Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-11-16
- Products: Honeywell International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 29, 2005, 70 FR 77073
- Comments due: February 27, 2006
- Became: [AD 2006-11-16](https://openairdocs.org/ad/2006-11-16)
- Docket: 98-ANE-72-AD
- FR document: E5-8019
- Official PDF: https://openairdocs.org/files/sha256/a1/10/a1107a27fa625e0d4f9c5f9e3d70dee8061757c7c27c4647f36663b0552d6327 (from https://www.govinfo.gov/content/pkg/FR-2005-12-29/pdf/E5-8019.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/12/29/E5-8019/airworthiness-directives-honeywell-international-inc-formerly-alliedsignal-inc-formerly-textron
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EA865DDB7056C722862570E6005B296D.0001
- Page: https://openairdocs.org/proposed/98-ANE-72-AD

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD), AD 98-22-11, for AlliedSignal, Inc. T5317A-1 turboshaft engines. That AD currently requires repetitive engine fuel pump pressure tests of certain fuel control regulator assemblies to determine if both fuel pumps in the fuel control regulator assemblies are producing fuel pressure. That AD also requires replacing the fuel control regulator assembly, if necessary. This proposed AD would require initial and repetitive visual and dimensional inspections of fuel control regulator assembly main and secondary drive shaft and pump gear splines, installed in certain fuel control regulator assemblies. This proposed AD would also expand the engine applicability, and include certain engines installed on helicopters certified under Sec. 21.25 or 21.27 of the Code of Federal Regulations (14 CFR 21.25 or 14 CFR 21.27). This proposed AD results from several reports of loss of fuel flow from the engine fuel control regulator assembly due to failure of both main and secondary drive shaft and pump gear splines. We are proposing this AD to prevent in-flight engine failure and forced autorotation landing.

## Notices in this docket

- Dec 29, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document E5-8019, comments due Feb 27, 2006 (https://www.federalregister.gov/documents/2005/12/29/E5-8019/airworthiness-directives-honeywell-international-inc-formerly-alliedsignal-inc-formerly-textron)

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