# Airworthiness Directives; Pratt & Whitney JT8D-200 Series Turbofan Engines
> **Rule** · Final rule. · Published 1999-05-13 · Effective 1999-06-14 · 64 FR 25802
## Document
- **Document number:** 99-11635
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney JT8D-200 Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 64 FR 25802
- **Publication date:** 1999-05-13
- **Effective date:** 1999-06-14
- **FAA docket:** Docket No. 96-ANE-02
## Abstract

This amendment supersedes an existing airworthiness directive (AD), applicable to Pratt & Whitney JT8D-200 series turbofan engines, that currently requires periodic inspection of fan blades for locked rotors and foreign object damage (FOD), unlocking of shrouds if necessary, lubrication of fan blade shrouds, and dimensional restoration of the fan blade leading edge. In addition, that AD requires installation of improved design fan blades as terminating action for the inspections. This AD will reduce the lubrication interval, and require removal of rotors that experience repeat lockups within 225 cycles in service. This supersedure is prompted by reports of twenty-five fan blade failures to date. The actions specified by the AD are intended to prevent fan blade failure, which can result in damage to the aircraft.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/05/13/99-11635/airworthiness-directives-pratt-and-whitney-jt8d-200-series-turbofan-engines)
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