# Proposed AD FAA-2011-0478: Airbus Model A300 B4-103, B4-203, and B4-2C Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-21-09
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 8, 2011, 76 FR 33176
- Comments due: July 25, 2011
- Became: [AD 2011-21-09](https://openairdocs.org/ad/2011-21-09)
- Docket: FAA-2011-0478 (https://www.regulations.gov/docket/FAA-2011-0478, where comments are filed)
- Project: 2010-NM-138-AD
- FR document: 2011-14094
- Official PDF: https://openairdocs.org/files/sha256/8f/4e/8f4e868e889899832693effa286e79df53d23f429287f522d0e016fbb6aaaeb8 (from https://www.govinfo.gov/content/pkg/FR-2011-06-08/pdf/2011-14094.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/06/08/2011-14094/airworthiness-directives-airbus-model-a300-b4-103-b4-203-and-b4-2c-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1A00AB1A3FB4E474862578A9004BE1B2.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0478

## 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:

One operator reported a failure of the MLG [main landing gear] retraction actuator sliding rod. This incident occurred at a number of operating flight cycles lower than the limit value imposed by the MLG manufacturer.

This condition, if not detected and corrected, results in undampened extension of the MLG, leading to higher than usual loads on the MLG attachment. Higher loads affect the structural integrity of the MLG and could lead to MLG failure.

* * * * *

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Jun 8, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-14094, comments due Jul 25, 2011 (https://www.federalregister.gov/documents/2011/06/08/2011-14094/airworthiness-directives-airbus-model-a300-b4-103-b4-203-and-b4-2c-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.