Great story John,
Another cause of many accidents concerning Beauforts, this time at No.1 OTU Bairnsdale. There had been many unexplained accidents and loss of life. Eventually it was discovered the heating and ventilation system had allowed Carbon Monoxide to enter the cockpit thereby disabling the crew with fatal results. This was discovered by a Melbourne Coroner named Taylor who had visited Bairnsdale and removed skin samples (without authority) and tested them. This problem had not manifested itself in the UK due mainly to the cooler climate and different use of this ventilation system. The problem continued after the Squadron moved to East Sale in 1943 before modifications were completed.
This combined with the said elevator trim tab problems certainly would not have instilled much confidence in the Beaufort even though it proved to be a fine aircraft.