The airplane’s inability to maintain a positive rate of climb after takeoff for undetermined reasons. Contributing to the accident was the pilot’s delayed reaction to initiate an emergency release of the spray mixture.

The erosion of the compressor impeller and the unsecured fuel control unit resulted in the loss of engine power during the initial climb.

Improper (low) outflow from the fuel control unit, due to improper maintenance, which resulted in a loss of engine power and a forced landing.