# Proposed AD FAA-2009-0864: DASSAULT AVIATION Model Falcon 10 Airplanes; Model FAN JET FALCON, FAN JET FALCON SERIES C, D, E, F, and G Airplanes; Model MYSTERE-FALCON 200 Airplanes; Model MYSTERE-FALCON 20-C5, 20-D5, 20-E5, and 20-F5 Airplanes; Model FALCON 2000 and FALCON 2000EX Airplanes; and Model MYSTERE-FALCON 50 and MYSTERE-FALCON 900 Airplanes, and FALCON 900EX Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-26-05
- Products: Dassault
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period.
- Published: July 27, 2010, 75 FR 43878
- Comments due: August 23, 2010
- Became: [AD 2010-26-05](https://openairdocs.org/ad/2010-26-05)
- Docket: FAA-2009-0864 (https://www.regulations.gov/docket/FAA-2009-0864, where comments are filed)
- Project: 2008-NM-202-AD
- FR document: 2010-18292
- Official PDF: https://openairdocs.org/files/sha256/14/01/14017c6b016fb87d2cb90d1fbb8c6191ed1ffdf50e5d45a91f866d37a4acddc6 (from https://www.govinfo.gov/content/pkg/FR-2010-07-27/pdf/2010-18292.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/07/27/2010-18292/airworthiness-directives-dassault-aviation-model-falcon-10-airplanes-model-fan-jet-falcon-fan-jet
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9228D7975393042C8625776D005A88B0.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0864

## Summary

We are revising an earlier NPRM for the products listed above. This action revises the earlier NPRM by expanding the scope. 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:

During maintenance on one aircraft, it was discovered that the overpressure capsules were broken on both pressurization valves. Failure of the pressurization control regulating valve (overpressure capsule) will affect the aircraft's overpressure protection * * *. * * * * * The unsafe condition is overpressurization, which can result in injury to the occupants and possible structural failure leading to loss of control of the airplane. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Sep 21, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-22576, comments due Oct 21, 2009 (https://www.federalregister.gov/documents/2009/09/21/E9-22576/airworthiness-directives-dassault-model-falcon-10-airplanes-model-fan-jet-falcon-airplanes-model)
- Jul 27, 2010: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document 2010-18292, comments due Aug 23, 2010 (https://www.federalregister.gov/documents/2010/07/27/2010-18292/airworthiness-directives-dassault-aviation-model-falcon-10-airplanes-model-fan-jet-falcon-fan-jet)

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