# Proposed AD 99-NM-347-AD: British Aerospace Model BAe 146 and Avro 146-RJ Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-05-28
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 15, 1999, 64 FR 69967
- Comments due: January 14, 2000
- Became: [AD 2000-05-28](https://openairdocs.org/ad/2000-05-28)
- Docket: 99-NM-347-AD
- FR document: 99-32511
- Official PDF: https://openairdocs.org/files/sha256/51/8a/518a7d1711806db3ad622da1d66d3f05b037c866cb6f0e2b53c636e8737bf200 (from https://www.govinfo.gov/content/pkg/FR-1999-12-15/pdf/99-32511.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/12/15/99-32511/airworthiness-directives-british-aerospace-model-bae-146-and-avro-146-rj-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-347-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all British Aerospace Model BAe 146 and Avro 146-RJ series airplanes. This proposal would require a one-time inspection to detect cracking or corrosion of the forward attachment bolts of the engine pylon to wing interface, and corrective action, if necessary. It would also require re-installation with re- protected and sealed bolts torqued to a lower level. 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 detect and correct corrosion or cracking of the forward attachment bolts of the engine pylon to wing interface, which could result in reduced structural integrity of the engine pylon attachment.

## Notices in this docket

- Dec 15, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-32511, comments due Jan 14, 2000 (https://www.federalregister.gov/documents/1999/12/15/99-32511/airworthiness-directives-british-aerospace-model-bae-146-and-avro-146-rj-series-airplanes)

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