AD 95-11-17 60 FR 28529

This amendment supersedes Airworthiness Directive (AD) 90-13- 12, which currently requires modifying the airplane electrical system and revising the emergency procedures section of the Airplane Flight Manual (AFM) on certain Jetstream Aircraft Limited (JAL) Jetstream Models 3101 and 3201 airplanes. This action retains the requirements of AD 90-13-12 for those airplanes that do not have modified inverters installed and the inverted transfer function restored. The Federal Aviation Administration (FAA) has determined that installing modified inverters along with restoring the inverter transfer function corrects the problems in the power supply addressed by AD 90-13-12. The actions specified by this AD are intended to prevent alternating current system failures, which, if not detected and corrected, could result in damage to the airplane navigational systems.