# Proposed AD FAA-2011-0647: Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes) and A310 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-20-03
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 29, 2011, 76 FR 38069
- Comments due: August 15, 2011
- Became: [AD 2011-20-03](https://openairdocs.org/ad/2011-20-03)
- Docket: FAA-2011-0647 (https://www.regulations.gov/docket/FAA-2011-0647, where comments are filed)
- Project: 2010-NM-193-AD
- FR document: 2011-16367
- Official PDF: https://openairdocs.org/files/sha256/2a/5e/2a5e7c57f630dd26d0107c9beb097edf7be4f50f24541b0650f6a4d1b9e76942 (from https://www.govinfo.gov/content/pkg/FR-2011-06-29/pdf/2011-16367.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/06/29/2011-16367/airworthiness-directives-airbus-model-a300-b4-600-b4-600r-and-f4-600r-series-airplanes-and-model
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E4B0D86E68BDB088862578BE004B49AA.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0647

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. 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:

Surface defects were visually detected on the rudder of an Airbus A319 and an A321 in-service aeroplane. Investigation has determined that the defects reported on both rudders corresponded to areas that had been reworked in production. The investigation confirmed that the defects were the result of de-bonding between the skin and honeycomb core. Such reworks were also performed on some rudders fitted on A310 and A300-600 aeroplanes.

An extended de-bonding, if not detected and corrected, may degrade the structural integrity of the rudder. The loss of the rudder leads to degradation of the handling qualities and reduces the controllability of the aeroplane.

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

## Notices in this docket

- Jun 29, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-16367, comments due Aug 15, 2011 (https://www.federalregister.gov/documents/2011/06/29/2011-16367/airworthiness-directives-airbus-model-a300-b4-600-b4-600r-and-f4-600r-series-airplanes-and-model)

---
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.