# Airworthiness Directives; Fokker Model F.28 Series Airplanes
> **Rule** · Final rule. · Published 2005-05-17 · Effective 2005-06-21 · 70 FR 28187
## Document
- **Document number:** 05-9466
- **Category:** airworthiness
- **Manufacturer:** Fokker Model F.28 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 28187
- **Publication date:** 2005-05-17
- **Effective date:** 2005-06-21
- **FAA docket:** Docket No. FAA-2005-20594
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Fokker Model F.28 series airplanes. This AD requires a one-time inspection of the area underneath the auxiliary power unit (APU) enclosure to determine if drain tubes in the area are correctly installed and to detect damaged wiring, and corrective action if necessary. This AD is prompted by a report of a fire under the APU enclosure. We are issuing this AD to prevent fuel from accumulating under the APU enclosure, which, in the presence of an ignition source, could result in a fire.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/05/17/05-9466/airworthiness-directives-fokker-model-f28-series-airplanes)
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