Airworthiness Directive · Amendment 39-18644 · Flight controls
Fokker Services B.V. Airplanes
This AD applies to all Fokker Services B.V. Model F28 Mark 0070 and 0100 airplanes, certificated in any category, all serial numbers.
We are adopting a new airworthiness directive (AD) for all Fokker Services B.V. Model F28 Mark 0070 and 0100 airplanes. This AD was prompted by an aileron-wing flutter analysis finding that, when a hydraulic aileron actuator is not powered while at least one aileron flutter damper is inoperative (latent failure), the maximum speed currently defined in the airplane flight manual (AFM) is insufficient to meet the required safety margin. This AD requires revising the AFM to include procedures to follow in the event of a hydraulic system failure and abnormal flight control behavior. We are issuing this AD to ensure that the flightcrew has procedures to follow in the event of a hydraulic system failure and abnormal flight control behavior. If not corrected, this condition could lead to aileron flutter and possible reduced control of the airplane.
Within 12 months after the effective date of this AD, revise the Abnormal Procedures and Limitations sections of the applicable AFM to include the information in Fokker Manual Change Notification—Operational Documentation MCNO-F100-066, dated December 1, 2014. This may be accomplished by inserting a copy of Fokker Manual Change Notification—Operational Documentation MCNO-F100-066, dated December 1, 2014, into the applicable AFM. Fokker Manual Change Notification—Operational Documentation MCNO-F100-066, dated December 1, 2014, introduces procedures for the flightcrew to follow in the event of a hydraulic system failure and abnormal flight control behavior. When the information in Fokker Manual Change Notification—Operational Documentation MCNO-F100-066, dated December 1, 2014, is included in the general revisions of the AFM, the general revisions may be inserted in the AFM, and Fokker Manual Change Notification—Operational Documentation MCNO-F100-066, dated December 1, 2014, may be removed.
