# Airworthiness Directives; Bombardier Model DHC-8-101, -102, -103, -106, -201, -202, -301, -311, and -315 Airplanes
> **Rule** · Final rule. · Published 2004-09-29 · Effective 2004-11-03 · 69 FR 58043
## Document
- **Document number:** 04-21646
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 69 FR 58043
- **Publication date:** 2004-09-29
- **Effective date:** 2004-11-03
- **FAA docket:** Docket No. 2002-NM-126-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to all Bombardier Model DHC-8-101, -102, -103, -106, -201, - 202, -301, -311, and -315 airplanes. This amendment requires a detailed inspection of the wing leading edge de-icer boots to determine if they comply with certain patch limits in the critical zone; and corrective action, if necessary. This action is necessary to prevent reduced aerodynamic smoothness of the wing leading edge de-icer boots and possible reduced stall margin, which could result in a significant increase in stall speeds, leading to a possible stall prior to activation of the stall warning. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/09/29/04-21646/airworthiness-directives-bombardier-model-dhc-8-101--102--103--106--201--202--301--311-and--315)
---
*AI Analytics · CC0 1.0*