# Proposed AD FAA-2006-24103: Airbus Model A300 B4-600R Series Airplanes, A300 C4-605R Variant F Airplanes, A300 F4-600R Series Airplanes, and Model A310-300 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-12-01
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 8, 2006, 71 FR 11555
- Comments due: April 7, 2006
- Became: [AD 2006-12-01](https://openairdocs.org/ad/2006-12-01)
- Docket: FAA-2006-24103 (https://www.regulations.gov/docket/FAA-2006-24103, where comments are filed)
- Project: 2005-NM-241-AD
- FR document: E6-3264
- Official PDF: https://openairdocs.org/files/sha256/1f/d1/1fd111686582d73ad26d46322faf90552b0c8bd556f11fb70383c6e22538916e (from https://www.govinfo.gov/content/pkg/FR-2006-03-08/pdf/E6-3264.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/03/08/E6-3264/airworthiness-directives-airbus-model-a300-b4-600r-series-airplanes-a300-c4-605r-variant-f-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0C913162DF16C2B08625712B005DDE2D.0001
- Page: https://openairdocs.org/proposed/FAA-2006-24103

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus transport category airplanes. This proposed AD would require replacing the existing vent float valve with a new improved vent float valve. This proposed AD results from reports of failure of the vent float valve in the left-hand outboard section of the trimmable horizontal stabilizer. We are proposing this AD to prevent, in the event of a lightning strike to the horizontal stabilizer, sparking of metal parts and debris from detached and damaged float vales, or a buildup of static electricity, which could result in ignition of fuel vapors and consequent fire or explosion.

## Notices in this docket

- Mar 8, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-3264, comments due Apr 7, 2006 (https://www.federalregister.gov/documents/2006/03/08/E6-3264/airworthiness-directives-airbus-model-a300-b4-600r-series-airplanes-a300-c4-605r-variant-f-airplanes)

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