# Proposed AD FAA-2012-0189: BAE SYSTEMS (OPERATIONS) LIMITED Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-12-22
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 6, 2012, 77 FR 13230
- Comments due: April 20, 2012
- Became: [AD 2012-12-22](https://openairdocs.org/ad/2012-12-22)
- Docket: FAA-2012-0189 (https://www.regulations.gov/docket/FAA-2012-0189, where comments are filed)
- Project: 2011-NM-133-AD
- FR document: 2012-5380
- Official PDF: https://openairdocs.org/files/sha256/2d/d7/2dd7e14d69a83c081c625c1077c00f66afaddff1f0b8fa8723aa66d9c646f30d (from https://www.govinfo.gov/content/pkg/FR-2012-03-06/pdf/2012-5380.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/03/06/2012-5380/airworthiness-directives-bae-systems-operations-limited-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7F9A21E29E0C540B862579B900537EC4.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0189

## Summary

We propose to adopt a new airworthiness directive (AD) for certain BAE SYSTEMS (OPERATIONS) LIMITED Model BAe 146 and Avro 146-RJ airplanes. This proposed AD was prompted by a report of a crack found on the left-hand sidewall well on the nose landing gear (NLG). This proposed AD would require performing a repetitive high frequency eddy current inspection of the stiffeners on the left-hand sidewall on the NLG gear bay for cracks, and repair or replace the sidewall if necessary. Replacing the sidewall with a certain sidewall part number constitutes a terminating action for the repetitive inspections. We are proposing this AD to detect and correct failure of the sidewall, which could result in consequent in-flight rapid decompression of the cabin and injury to the passengers.

## Notices in this docket

- Mar 6, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-5380, comments due Apr 20, 2012 (https://www.federalregister.gov/documents/2012/03/06/2012-5380/airworthiness-directives-bae-systems-operations-limited-airplanes)

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