# Proposed AD 94-ANE-49: Pratt & Whitney JFTD12A Series and T73 Series Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-02-13
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 20, 1995, 60 FR 54203
- Comments due: December 19, 1995
- Became: [AD 97-02-13](https://openairdocs.org/ad/97-02-13)
- Docket: 94-ANE-49
- FR document: 95-25994
- Official PDF: https://openairdocs.org/files/sha256/2c/17/2c17e1b72596aa149a5d5971f80fbe568cb1c382381c8e88a0cbbbcc88e360aa (from https://www.govinfo.gov/content/pkg/FR-1995-10-20/pdf/95-25994.pdf)
- Federal Register: https://www.federalregister.gov/documents/1995/10/20/95-25994/airworthiness-directives-pratt-and-whitney-jftd12a-series-and-t73-series-turboshaft-engines
- Page: https://openairdocs.org/proposed/94-ANE-49

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Pratt & Whitney (PW) JFTD12A series and T73 series turboshaft engines. This proposal would require initial and repetitive fluorescent penetrant inspections (FPI) of compressor hubs, disks, spacers, and bolted on (rotating) airseals for cracks, and replacement, if necessary, with serviceable parts. This proposal is prompted by reports of extensive compressor rotor part cracking. The actions specified by the proposed AD are intended to prevent disk rupture, an uncontained engine failure, and possible damage to the helicopter.

## Notices in this docket

- Oct 20, 1995: Notice of proposed rulemaking (NPRM). (first notice), FR document 95-25994, comments due Dec 19, 1995 (https://www.federalregister.gov/documents/1995/10/20/95-25994/airworthiness-directives-pratt-and-whitney-jftd12a-series-and-t73-series-turboshaft-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.