Summary
We propose to adopt a new airworthiness directive (AD) for all Fokker Services B.V. Model F.28 Mark 0070 and 0100 airplanes. This proposed AD was prompted by accomplishment of a taxi-out checklist which revealed that the elevator movement was partially obstructed due to rotation of the flight control lock adjuster bracket. This proposed AD would require a one-time inspection of the elevator tension control regulator for discrepancies, and corrective actions if necessary. We are proposing this AD to detect and correct discrepancies of the elevator tension control regulators, which could result in jamming of the elevator mechanism and consequent reduced controllability of the airplane.