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Tue, Dec 04, 2007

AD: Fokker

AD NUMBER: 2007-25-04
MANUFACTURER: Fokker
SUBJECT: Airworthiness Directive 2007-25-04
SUMMARY:
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: During scheduled MRB (maintenance review board) mid-life X ray inspections of Fokker 50 (F27 Mark 050) engine mount frames, severe internal corrosion of the tubes was discovered.. In some locations, the depth of the corrosion spots appeared to bemore than 50 percent of material thickness. * * * This condition, if not corrected, could ultimately lead to failure of the engine mounting frame in cases where multiple tubes are severely affected.* * * This AD requires actions that are intended to address the unsafe condition described in theMCAI.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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