# Proposed AD 98-NM-384-AD: Bombardier Model DHC-8-100 and -300 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-19-37
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 20, 1999, 64 FR 38850
- Comments due: August 19, 1999
- Became: [AD 99-19-37](https://openairdocs.org/ad/99-19-37)
- Docket: 98-NM-384-AD
- FR document: 99-18410
- Official PDF: https://openairdocs.org/files/sha256/8f/21/8f21913946315e5e19381039aa9ee8ac5cb243918674225cf00c694a2811eafe (from https://www.govinfo.gov/content/pkg/FR-1999-07-20/pdf/99-18410.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/07/20/99-18410/airworthiness-directives-bombardier-model-dhc-8-100-and--300-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-384-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Bombardier Model DHC-8-100 and -300 series airplanes. This proposal would require replacement of the main landing gear (MLG) uplock actuator on both the left and right MLG with a new redesigned uplock assembly. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent failure of the MLG to extend when a ``gear down'' selection is made.

## Notices in this docket

- Jul 20, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-18410, comments due Aug 19, 1999 (https://www.federalregister.gov/documents/1999/07/20/99-18410/airworthiness-directives-bombardier-model-dhc-8-100-and--300-series-airplanes)

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