# Proposed AD 97-NM-287-AD: Fokker Model F.28 Mark 1000, 2000, 3000, and 4000 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-17-08
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 1, 1997, 62 FR 63473
- Comments due: December 31, 1997
- Became: [AD 98-17-08](https://openairdocs.org/ad/98-17-08)
- Docket: 97-NM-287-AD
- FR document: 97-31331
- Official PDF: https://openairdocs.org/files/sha256/58/ad/58add4bdd958c419a68432131d369b6740c169696cb5d0ab1e480126f83df603 (from https://www.govinfo.gov/content/pkg/FR-1997-12-01/pdf/97-31331.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/12/01/97-31331/airworthiness-directives-fokker-model-f28-mark-1000-2000-3000-and-4000-series-airplanes
- Page: https://openairdocs.org/proposed/97-NM-287-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Fokker Model F.28 Mark 1000, 2000, 3000, and 4000 series airplanes. This proposal would require repetitive inspections to detect any discrepancy in the sealwire of the fireguards of the engine fire shut-off system, and repair, if necessary. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent inadvertent closure of the fire shut-off valves due to ineffective or absent sealwires, which could result in in-flight engine shutdown.

## Notices in this docket

- Dec 1, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-31331, comments due Dec 31, 1997 (https://www.federalregister.gov/documents/1997/12/01/97-31331/airworthiness-directives-fokker-model-f28-mark-1000-2000-3000-and-4000-series-airplanes)

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