# Proposed AD 2000-NM-179-AD: BAe Systems (Operations) Limited Model BAe 146 and Model Avro 146-RJ Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-15-33
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: February 21, 2001, 66 FR 10976
- Comments due: March 19, 2001
- Became: [AD 2001-15-33](https://openairdocs.org/ad/2001-15-33)
- Docket: 2000-NM-179-AD
- FR document: 01-4218
- Official PDF: https://openairdocs.org/files/sha256/84/c8/84c8c3d555d1fa67af1e2ac9f7be2da644adf1b5a9b0f8e6ca72caae38eccdd4 (from https://www.govinfo.gov/content/pkg/FR-2001-02-21/pdf/01-4218.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/02/21/01-4218/airworthiness-directives-bae-systems-operations-limited-model-bae-146-and-model-avro-146-rj-series
- Page: https://openairdocs.org/proposed/2000-NM-179-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to all BAe Systems (Operations) Limited Model BAe 146 and Model Avro 146-RJ series airplanes, that would have superseded an existing AD that currently requires a one-time inspection for "drill marks" and corrosion on the underside of the wing top skin, and corrective actions, if necessary. The proposed AD would have required a one-time inspection for "drill marks" and corrosion, and corrective actions, if necessary, per new procedures. For certain airplanes, the proposed AD would have added a requirement for one-time detailed visual and borescopic inspections of the fuel tank, pump, and stringers for paint debris and inadequacy of the existing protective treatment coating; and corrective actions, if necessary. This new action revises the proposed rule by requiring repetitive inspections for "drill marks" and corrosion on the underside of the wing top skin, and corrective actions, if necessary, until all corrective actions and protective treatment actions are done. The actions specified by this new proposed AD are intended to prevent corrosion from developing on the underside of the top skin of the center wing, which could result in reduced structural integrity of the airplane.

## Notices in this docket

- Jul 27, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-18996, comments due Aug 28, 2000 (https://www.federalregister.gov/documents/2000/07/27/00-18996/airworthiness-directives-british-aerospace-model-bae-146-and-model-avro-146-rj-series-airplanes)
- Feb 21, 2001: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 01-4218, comments due Mar 19, 2001 (https://www.federalregister.gov/documents/2001/02/21/01-4218/airworthiness-directives-bae-systems-operations-limited-model-bae-146-and-model-avro-146-rj-series)

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