On 5 November 2008 at about 1838 Eastern Standard Time1, the flight crew of a Saab Aircraft AB 340B, registered VH-UYI, identified an incipient stall while flying a holding pattern in icing conditions. The aircraft's stall warning system did not activate. The pilot in command disconnected the autopilot and recovered the aircraft from the stall. During the recovery manoeuvre, both engines exceeded their maximum continuous operating temperature for an extended period. The manufacturer's Aircraft Operating Manual stated that the Saab 340B stall warning system had an activation level designed for a clean wing only. The manufacturer has issued updated operating procedures for flight in icing conditions, designed to prevent ice build-up on the airframe.
