# Proposed AD FAA-2005-21343: 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 Model A310 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-22-03
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 3, 2005, 70 FR 32547
- Comments due: July 5, 2005
- Became: [AD 2006-22-03](https://openairdocs.org/ad/2006-22-03)
- Docket: FAA-2005-21343 (https://www.regulations.gov/docket/FAA-2005-21343, where comments are filed)
- Project: 2004-NM-117-AD
- FR document: 05-11062
- Official PDF: https://openairdocs.org/files/sha256/00/c1/00c15d8c26b91ed59012b054b2894032cda522b84512e8637e12dfb5117a40e6 (from https://www.govinfo.gov/content/pkg/FR-2005-06-03/pdf/05-11062.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/06/03/05-11062/airworthiness-directives-airbus-model-a300-b4-600-b4-600r-and-f4-600r-series-airplanes-and-model
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5C4068C95EC0D28986257015005C9D62.0001
- Page: https://openairdocs.org/proposed/FAA-2005-21343

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus models, as specified above. This proposed AD would require modifying the aft pressure bulkhead for improved corrosion protection and drainage, and related concurrent actions. This proposed AD is prompted by severe corrosion found in the lower rim area of the aft pressure bulkhead during routine maintenance of an airplane. We are proposing this AD to prevent corrosion on the inner rim angle and cleat profile splice of the aft pressure bulkhead, which could result in the loss of airplane structural integrity.

## Notices in this docket

- Jun 3, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-11062, comments due Jul 5, 2005 (https://www.federalregister.gov/documents/2005/06/03/05-11062/airworthiness-directives-airbus-model-a300-b4-600-b4-600r-and-f4-600r-series-airplanes-and-model)

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