# Airworthiness Directives; Fokker Model F28 Mark 0100 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 1998-03-12 · Effective 1998-03-27 · 63 FR 11985
## Document
- **Document number:** 98-6329
- **Category:** airworthiness
- **Manufacturer:** Fokker Model F28 Mark 0100 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 63 FR 11985
- **Publication date:** 1998-03-12
- **Effective date:** 1998-03-27
- **FAA docket:** Docket No. 98-NM-39-AD
## Abstract

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0100 series airplanes, that currently requires a revision to the Airplane Flight Manual (AFM) to include procedures to prohibit use of reverse engine thrust power settings between idle and emergency maximum. This amendment revises the existing AFM revision requirement, and adds a new revision to the AFM to prohibit stabilized engine operation in a certain engine speed range on the ground. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to prevent stabilized engine operation in a certain engine speed range on the ground, which could result in uncontained engine fan blade failure due to high cycle fatigue cracking.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/03/12/98-6329/airworthiness-directives-fokker-model-f28-mark-0100-series-airplanes)
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