# Proposed AD FAA-2013-0539: Airbus Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-20-10
- Products: Airbus
- Product type: Aircraft
- Action: Notice of Proposed Rulemaking (NPRM).
- Published: July 3, 2013, 78 FR 40069
- Comments due: August 19, 2013
- Became: [AD 2013-20-10](https://openairdocs.org/ad/2013-20-10)
- Docket: FAA-2013-0539 (https://www.regulations.gov/docket/FAA-2013-0539, where comments are filed)
- Project: 2012-NM-145-AD
- FR document: 2013-15959
- Official PDF: https://openairdocs.org/files/sha256/cd/b5/cdb5bfcbd5ec5d2527c5e099ed5e2ad21c86ee55482580bf07001ac968435063 (from https://www.govinfo.gov/content/pkg/FR-2013-07-03/pdf/2013-15959.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/07/03/2013-15959/airworthiness-directives-airbus-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B17345D3ACD3BF7586257B9D004D3208.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0539

## Summary

We propose to supersede airworthiness directive (AD) 2000-12- 11, that applies to certain Model A300 B4-600 and Model A300 B4-600R series airplanes. That AD currently requires repetitive inspections to detect cracks in the bolt holes inboard and outboard of rib 9 on the bottom booms of the front and rear wing spars, and repair if necessary. Since we issued that AD, we have determined through a fleet survey and an updated fatigue and damage tolerance analysis that the risk for fatigue cracking on the front and rear spar bottom booms is higher than was initially determined. This proposed AD would reduce the initial inspection compliance time and repetitive inspection interval. We are proposing this AD to detect and correct fatigue cracks in the bolt holes of the wing spars, which could result in reduced structural integrity of a wing spar.

## Notices in this docket

- Jul 3, 2013: Notice of Proposed Rulemaking (NPRM). (first notice), FR document 2013-15959, comments due Aug 19, 2013 (https://www.federalregister.gov/documents/2013/07/03/2013-15959/airworthiness-directives-airbus-airplanes)

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