# Proposed AD FAA-2011-0908: BAE SYSTEMS (Operations) Limited Model BAe 146 Airplanes and Model Avro 146-RJ Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-24-06
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 26, 2011, 76 FR 53348
- Comments due: October 11, 2011
- Became: [AD 2011-24-06](https://openairdocs.org/ad/2011-24-06)
- Docket: FAA-2011-0908 (https://www.regulations.gov/docket/FAA-2011-0908, where comments are filed)
- Project: 2010-NM-251-AD
- FR document: 2011-21851
- Official PDF: https://openairdocs.org/files/sha256/f6/4c/f64cab0444992a5917fc66f09ca225deeda4324f57ca9a095e88357684464d24 (from https://www.govinfo.gov/content/pkg/FR-2011-08-26/pdf/2011-21851.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/08/26/2011-21851/airworthiness-directives-bae-systems-operations-limited-model-bae-146-airplanes-and-model-avro
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DEFD8EDCC53A8C94862578F800502FFF.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0908

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above that would supersede an existing AD. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

* * * * *

* * * BAE Systems (Operations) Limited has amended the AMM [aircraft maintenance manual] to remove the life limits on shock absorber assemblies, but not the individual shock absorber components, and amend the life limits on the different standards of Main Landing Gear (MLG) Up-Locks and MLG Door Up-Locks in sub- chapter 05-10-15. In addition BAE Systems has amended Chapter 05-10- 15 of the AMM to introduce and amend life limits on MLG components.

* * * * *

The unsafe condition is fatigue cracking of certain structural elements which could adversely affect the structural integrity of these airplanes. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Aug 26, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-21851, comments due Oct 11, 2011 (https://www.federalregister.gov/documents/2011/08/26/2011-21851/airworthiness-directives-bae-systems-operations-limited-model-bae-146-airplanes-and-model-avro)

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