# Proposed AD FAA-2011-0259: Dassault-Aviation Model FALCON 7X Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-13-07
- Products: Dassault
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 29, 2011, 76 FR 17364
- Comments due: May 13, 2011
- Became: [AD 2011-13-07](https://openairdocs.org/ad/2011-13-07)
- Docket: FAA-2011-0259 (https://www.regulations.gov/docket/FAA-2011-0259, where comments are filed)
- Project: 2010-NM-196-AD
- FR document: 2011-7290
- Official PDF: https://openairdocs.org/files/sha256/4c/14/4c141bca21443d584fb07766982bd4814c0d036dfad8a5742c632da8c789dbe1 (from https://www.govinfo.gov/content/pkg/FR-2011-03-29/pdf/2011-7290.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/03/29/2011-7290/airworthiness-directives-dassault-aviation-model-falcon-7x-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/33F33E4A9A5261AF86257862004CC025.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0259

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above that would supersede an existing AD. 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:

Several occurrences of untimely radio-altimeter lock-up have been reported, where the failed radio-altimeter indicated a negative distance to the ground despite the aircraft was flying at medium or high altitude.

A locked radio-altimeter 1 leads to untimely inhibition of warnings that could be displayed along with certain abnormal conditions while the avionic system switches into landing mode during altitude cruise. * * * * * [Untimely radio altimeter lock-up] may cause the crew to be unaware of possible system failures that could require urgent crew's actions. * * * * *

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Mar 29, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-7290, comments due May 13, 2011 (https://www.federalregister.gov/documents/2011/03/29/2011-7290/airworthiness-directives-dassault-aviation-model-falcon-7x-airplanes)

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