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Sat, Mar 01, 2008

AD: Fokker

AD NUMBER: 2008-04-22
MANUFACTURER: Fokker
SUBJECT: Airworthiness Directive 2008-04-22
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 ofanother country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Reports have been received from Fokker 100 (F28 Mark 0100) operators where the crew experienced difficulties with roll control.

Analysis suggests that these phenomena are due to frozen water on the aileron pulleys that are installed on the Center Wing Spar and located in the Main Landing Gear (MLG) wheel bays. Investigation has confirmed that improper closure of the aerodynamic seals of the wing-to-fuselage fairings above the MLG wheel bays can cause rainwater, wash-water or de-icing fluid to leak onto the affected aileron pulleys.

This condition, if not corrected, can lead to further incidents of frozen water on aileron pulleys during operation of the aircraft, resulting in restricted roll control and/or higher control forces. * * *

We are issuing this AD to require actions to correct the unsafe condition on these products.

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

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