# Proposed AD FAA-2004-19566: Airbus Model A300 B2 and A300 B4 Series Airplanes; and Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes)

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-13-04
- Products: Airbus
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period.
- Published: March 27, 2006, 71 FR 15084
- Comments due: April 21, 2006
- Became: [AD 2006-13-04](https://openairdocs.org/ad/2006-13-04)
- Docket: FAA-2004-19566 (https://www.regulations.gov/docket/FAA-2004-19566, where comments are filed)
- Project: 2004-NM-72-AD
- FR document: E6-4406
- Official PDF: https://openairdocs.org/files/sha256/57/fb/57fb2b2a1db88d81dfe8fc6ce02b7291436a55735f7f338a7a284a527556e2e0 (from https://www.govinfo.gov/content/pkg/FR-2006-03-27/pdf/E6-4406.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/03/27/E6-4406/airworthiness-directives-airbus-model-a300-b2-and-a300-b4-series-airplanes-and-model-a300-b4-600
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B47789CD3D212E098625713E006C91E4.0001
- Page: https://openairdocs.org/proposed/FAA-2004-19566

## Summary

The FAA is revising an earlier supplemental NPRM for an airworthiness directive (AD) that applies to certain Airbus airplanes as listed above. The first supplemental NPRM would have required repetitively inspecting for cracking in the web of nose rib 7 of the inner flap on the wings, and performing related investigative/ corrective actions if necessary. The original NPRM resulted from reports of cracking in the web of nose rib 7 of the inner flap. This action revises the first supplemental NPRM by requiring eventual replacement of nose rib 7 with a new, improved rib, which would terminate the proposed inspections. This action also removes from the applicability airplanes on which the improved nose rib 7 was installed during production. We are proposing this supplemental NPRM to prevent cracking in the web of nose rib 7, which could result in rupture of the attachment fitting between the inner flap and flap track 2, and consequent reduced structural integrity of the flap.

## Notices in this docket

- Nov 10, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-25030, comments due Dec 10, 2004 (https://www.federalregister.gov/documents/2004/11/10/04-25030/airworthiness-directives-airbus-model-a300-b2-and-a300-b4-series-airplanes-and-model-a300-b4-600)
- Sep 15, 2005: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document 05-18312, comments due Oct 11, 2005 (https://www.federalregister.gov/documents/2005/09/15/05-18312/airworthiness-directives-airbus-model-a300-b2-and-a300-b4-series-airplanes-and-model-a300-b4-600)
- Mar 27, 2006: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document E6-4406, comments due Apr 21, 2006 (https://www.federalregister.gov/documents/2006/03/27/E6-4406/airworthiness-directives-airbus-model-a300-b2-and-a300-b4-series-airplanes-and-model-a300-b4-600)

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