Airworthiness Directive · Amendment 39-19506 · Wings
Dassault Aviation Airplanes
This AD applies to Dassault Aviation Model MYSTERE-FALCON 50, MYSTERE-FALCON 900, and FALCON 900EX airplanes equipped with blended winglets installed in accordance with the supplemental type certificate (STC) specified in paragraph (c)(1) or (c)(2) of this AD, as applicable.
(1) For Model MYSTERE-FALCON 50 airplanes: STC ST02241SE.
(2) For Model MYSTERE-FALCON 900 and FALCON 900EX airplanes: STC ST02188SE.
We are adopting a new airworthiness directive (AD) for certain Dassault Aviation Model MYSTERE-FALCON 50, MYSTERE-FALCON 900, and FALCON 900EX airplanes. This AD was prompted by reports of cracked reinforcing straps (doublers) on the ailerons of airplanes equipped with blended winglets. This AD requires repetitive detailed inspections for cracking of the upper and lower reinforcing straps on the ailerons, and replacement if necessary. We are issuing this AD to address the unsafe condition on these products.
Within 8 months or 400 flight hours (FH), whichever occurs first, after the effective date of this AD, and thereafter at intervals not to exceed 8 months or 400 FH, whichever occurs first: Do a detailed inspection for cracking of the upper and lower reinforcing straps of the LH and RH ailerons, in accordance with the Accomplishment Instructions of Aviation Partners, Inc., Falcon Service Bulletin SBF9-17-001, Revision B, dated December 20, 2017. If any cracked aileron reinforcing strap is found, before further flight: Replace the reinforcing strap with a new part, in accordance with the Accomplishment Instructions of Aviation Partners, Inc., Falcon Service Bulletin SBF9-17-002, Revision A, dated December 20, 2017.
Replacement of any aileron reinforcing strap with a new part, in accordance with the Accomplishment Instructions of Aviation Partners, Inc., Falcon Service Bulletin SBF9-17-002, Revision A, dated December 20, 2017, constitutes terminating action for the repetitive inspections required by paragraph (g) of this AD for that part only.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
