# Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100 Series Airplanes
> **Rule** · Final rule. · Published 2000-02-24 · Effective 2000-03-30 · 65 FR 9211
## Document
- **Document number:** 00-4119
- **Category:** airworthiness
- **Manufacturer:** Fokker Model F.28 Mark 0070 and 0100 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 65 FR 9211
- **Publication date:** 2000-02-24
- **Effective date:** 2000-03-30
- **FAA docket:** Docket No. 99-NM-325-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to all Fokker Model F.28 Mark 0070 and 0100 series airplanes, that requires a measurement of the resistance of the electrical connectors of the auxiliary power unit (APU) to detect a short circuit; an inspection to determine if the grommets or shrink sleeves are present; and modification, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to detect and prevent a short circuit of a fire extinguisher electrical system due to a lack of shrink sleeves or grommets, and consequent disabling of the affected fire extinguisher system.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/02/24/00-4119/airworthiness-directives-fokker-model-f28-mark-0070-and-0100-series-airplanes)
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