pdf GFA AD 685 Issue 1 Popular
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GFA AD 685 Issue 1.pdf
MANUFACTURE AND FITMENT OF FRONT COCKPIT CANOPY JETTISON GUARD
An Australian PW-6U experienced an uncommanded front canopy jettison in flight. Investigation into the event suggested that the canopy jettison could be triggered by inadvertent contact by the front pilot’s / passenger’s foot. Warwick Gliding Club developed and had approved a modification to prevent uncommanded jettison by fitting a guard below the canopy jettison mechanism. This Airworthiness Directive mandates a similar protective guard to be manufactured and fitted on a PW-6U aircraft. The guard design is based on the guard developed for VH-WGQ S/N 78/05/01.