What happened
Shortly after takeoff, the aircraft experienced a loss of power in both engines. The instructor pilot on board reported that both engines emitted a "popping noise" immediately before the power loss occurred. Due to the dual engine failure, the crew performed a forced landing in a field. During the aircraft's rollout, it collided with a ditch.
The investigation
A post-crash examination of the aircraft was conducted to identify any mechanical issues. Investigators found no evidence of any pre-existing mechanical problems on the aircraft.
To further investigate the reported popping noise and power loss, a subsequent engine test-run attempt was performed. During this test, both engines started normally and developed power. The right engine's run was restricted to 55% power due to damage sustained during the accident. The left engine was tested at full power without any issues. During the testing of the left engine, fuel was intentionally shut off; after approximately 30 seconds, the engine began making a popping noise and lost power, replicating the symptoms described by the pilot.