Airworthiness Directive · Amendment 39-15988 · Flight controls
Fokker Model F.27 Mark 050 Airplanes
This AD applies to Fokker Model F.27 Mark 050 airplanes, certificated in any category, all serial numbers, if in a post Fokker Service Bulletin SBF50-27-030 configuration.
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, do the following actions.
(1) Within 12 months after the effective date of this AD, inspect the clearance between the flap mechanical drive nut and the up-and-down-stop, and before further flight, do all applicable corrective actions, in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF50-27-043, dated November 17, 2008.
(2) If, during accomplishment of the actions required by paragraph (f)(1) of this AD, abutments marks are found, or when the up-and-down-stop touches the drive nut after a full up or down selection in the hydraulic mode, before further flight, do a non-destructive inspection for cracking, in accordance with Fokker Service Bulletin SBF50-27-043, dated November 17, 2008. If any cracking is found, before further flight, replace the part with a serviceable part.
Note 1: This AD differs from the MCAI and/or service information as follows: No differences.
