# Airworthiness Directives; Bombardier Model DHC-8-401 and -402 Airplanes
> **Rule** · Final rule; request for comments. · Published 2004-03-10 · Effective 2004-03-25 · 69 FR 11290
## Document
- **Document number:** 04-4682
- **Category:** airworthiness
- **Manufacturer:** Bombardier Model DHC-8-401 and -402
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 69 FR 11290
- **Publication date:** 2004-03-10
- **Effective date:** 2004-03-25
- **FAA docket:** Docket No. 2004-NM-11-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Bombardier Model DHC-8-401 and -402 airplanes. This action requires a records review to determine the repair/ modification status of the airplane, and follow-on and corrective actions as necessary. This action is necessary to prevent cracks in the lower fuselage skin due to fatigue damage in the vicinity of the Number 2 VHF antenna, which could result in rapid decompression of the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/03/10/04-4682/airworthiness-directives-bombardier-model-dhc-8-401-and--402-airplanes)
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