# Airworthiness Directives; Bombardier Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 Airplanes
> **Rule** · Final rule. · Published 2004-02-11 · Effective 2004-03-17 · 69 FR 6546
## Document
- **Document number:** 04-2681
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 69 FR 6546
- **Publication date:** 2004-02-11
- **Effective date:** 2004-03-17
- **FAA docket:** Docket No. 2002-NM-79-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model DHC-8-102, -103, -106, -201, - 202, -301, -311, and -315 airplanes, that requires a one-time inspection to determine the serial numbers of the elevator and aileron servos of the drive assemblies of the automatic flight control system, and follow-on corrective actions if necessary. This action is necessary to prevent separation of the screws from the autopilot clutch assembly of the SM-300 servo, which could result in uncommanded engagement of the autopilot servo and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/02/11/04-2681/airworthiness-directives-bombardier-model-dhc-8-102--103--106--201--202--301--311-and--315-airplanes)
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