Airworthiness Directive · Amendment 39-15957 · Ice and rain protection
Dassault Model Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 Airplanes
This AD applies to Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 airplanes, certificated in any category, without Dassault Service Bulletin F20-766 implemented.
We are adopting a new airworthiness directive (AD) for the products listed above. This 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:
Unless already done, within 7 months after the effective date of this AD, perform an inspection for a red line marking on each of the Wiggins couplings that are located near the de-icing valves (12H1) and (12H2), in accordance with Dassault Mandatory Service Bulletin F20-766, Revision 1, dated June 24, 2008. If a red line is not found, prior to further flight, replace the seals to the left and right Wiggins couplings, in accordance with Dassault Mandatory Service Bulletin F20-766, Revision 1, dated June 24, 2008. Inspections and replacements accomplished before the effective date of this AD in accordance with Dassault Service Bulletin F20-766, dated October 31, 2005, are considered acceptable for compliance with the corresponding actions specified in this AD.
Note 1: This AD differs from the MCAI and/or service information as follows: No differences.
