AD NUMBER: 2005-13-37 MANUFACTURER: Fokker SUBJECT: Airworthiness Directive 2005-13-37 SUMMARY: The FAA is adopting a new airworthiness
directive (AD) for all Fokker Model F.28 Mark 0070 and 0100
airplanes. This AD requires repetitive inspections for damage of
the drive rod assembly of the aileron tab on each aileron actuator;
repetitive measurements of the clearance between the aileron
hydraulic lines and the drive rod; and related investigative and
corrective actions if necessary.
This AD is prompted by a report of an aileron 2 fault caused by
severe wear of the polyamide washer that is part of an
anti-rotation bush assembly in the aileron attachment lug. We are
issuing this AD to prevent excessive wear of the polyamide washer
of the aileron actuator bush assembly, which could result in
aileron flutter and loss of control of the airplane.