Summary
We propose to adopt a new airworthiness directive (AD) for certain Fokker Services B.V. Model F.28 airplanes. This proposed AD prompted by reports indicating that the main landing gear (MLG) could not be extended and locked down during approach. This proposed AD would require a detailed inspection of the restrictor check valve filter screens to detect any degraded or failed filter screens, and installation of serviceable parts. We are proposing this AD to detect and correct any degraded or failed filter screens. This condition, if not corrected, could prevent MLG extension and lock-down and result in an emergency landing with consequent injury to occupants and damage to the airplane.