# Airworthiness Directives; Pratt & Whitney JT8D-200 Series Turbofan Engines
> **Rule** · Final rule. · Published 1999-10-29 · Effective 1999-12-28 · 64 FR 58328
## Document
- **Document number:** 99-28075
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney JT8D-200 Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 64 FR 58328
- **Publication date:** 1999-10-29
- **Effective date:** 1999-12-28
- **FAA docket:** Docket No. 92-ANE-15
## Abstract

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Pratt & Whitney JT8D-200 series turbofan engines, that currently requires installation of high pressure turbine (HPT) containment hardware. This amendment requires removing low pressure turbine (LPT)-to-exhaust case bolts and nuts and replacement with improved LPT-to-exhaust case bolts and nuts, and installation of improved HPT containment hardware. This amendment is prompted by uncontained HPT events resulting from HPT shaft fractures and LPT flange separations resulting from LPT blade failures. The actions specified by this AD are intended to prevent damage to the airplane resulting from uncontained engine debris following an HPT shaft fracture or an LPT blade failure.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/10/29/99-28075/airworthiness-directives-pratt-and-whitney-jt8d-200-series-turbofan-engines)
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