# Proposed AD 98-NM-345-AD: British Aerospace BAe Model ATP Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-21-16
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 15, 1999, 64 FR 38156
- Comments due: August 16, 1999
- Became: [AD 99-21-16](https://openairdocs.org/ad/99-21-16)
- Docket: 98-NM-345-AD
- FR document: 99-18103
- Official PDF: https://openairdocs.org/files/sha256/e8/39/e839d2bc37887ca616e01fbf9a454cdef1469fcf2050879d44feaa20d0b24736 (from https://www.govinfo.gov/content/pkg/FR-1999-07-15/pdf/99-18103.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/07/15/99-18103/airworthiness-directives-british-aerospace-bae-model-atp-airplanes
- Page: https://openairdocs.org/proposed/98-NM-345-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain British Aerospace BAe Model ATP airplanes. This proposal would require repetitive replacements of the weight on wheels microswitch harness subassembly with a new microswitch harness subassembly. 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 a nose wheel shimmy, which could result in the collapse of the nose landing gear during takeoff or landing and possible injury to the flightcrew and passengers.

## Notices in this docket

- Jul 15, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-18103, comments due Aug 16, 1999 (https://www.federalregister.gov/documents/1999/07/15/99-18103/airworthiness-directives-british-aerospace-bae-model-atp-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.