pdf Gfa ad 307 issue 1 Popular
gfa ad 307 issue 1.pdf
MODIFICATION / INSPECTION / REPAIR OF THE AIRBRAKE SYSTEM
Applicable to all Pilatus B4 PC 11 series gliders. Two Pilatus B4 gliders in Australia experienced in flight failures of their airbrake systems following rapid extension of the airbrakes mistakenly extended by the pilots who intended to retract the undercarriage. The airbrake control system in the wing was damaged by the airbrakes moving out of the wing too far, under their own energy over riding the 'out stop' on the cockpit. Pilatus Aircraft Ltd has issued Service Bulletin No. 1004 which forms part of this AD.