# Proposed AD FAA-2011-0306: BAE SYSTEMS (Operations) Limited Model 4101 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-21-06
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 8, 2011, 76 FR 19716
- Comments due: May 23, 2011
- Became: [AD 2011-21-06](https://openairdocs.org/ad/2011-21-06)
- Docket: FAA-2011-0306 (https://www.regulations.gov/docket/FAA-2011-0306, where comments are filed)
- Project: 2010-NM-176-AD
- FR document: 2011-8410
- Official PDF: https://openairdocs.org/files/sha256/a6/49/a649ebdfb979c3f659583ba1e1e240e15c5057457dc8f67cae0b5b647e44435f (from https://www.govinfo.gov/content/pkg/FR-2011-04-08/pdf/2011-8410.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/04/08/2011-8410/airworthiness-directives-bae-systems-operations-limited-model-4101-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/597C1CD3A6F3E27E8625786C0048024B.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0306

## 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) Ltd has issued Revision 33 of the AMM [airplane maintenance manual] to amend Chapter 05-10-10 by adding one new Structurally Significant Item (SSI) and increasing the repeat inspection period on another SSI. Failure to comply with this revision constitutes an unsafe condition.

The unsafe condition is failure of certain structurally significant items, including the main landing gear and the nose landing gear, which could result in reduced structural integrity of the airplane; and fuel vapor ignition sources, which could result in a fuel tank explosion and consequent loss ofthe airplane. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Apr 8, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-8410, comments due May 23, 2011 (https://www.federalregister.gov/documents/2011/04/08/2011-8410/airworthiness-directives-bae-systems-operations-limited-model-4101-airplanes)

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