What happened
On 13 November 2011, a Piper PA-22-160 (registration G-BTLM) was performing a private flight when the pilot attempted a go-around from a final approach at Leicester Airport. At approximately 2,000 ft, the aircraft was in a cruise configuration with the engine at idle and no flaps extended. Upon applying full throttle to initiate the go-around, the engine failed to respond to the pilot's input. In an effort to regain power, the pilot pumped the throttle, but this action caused the engine to stop completely.
With the engine inoperative, the pilot performed a forced landing in a nearby field. During the landing, the aircraft's right wing struck a small tree, causing substantial damage to the airframe. The pilot was able to exit the aircraft through the rear left door, as the damage to the right wing had obstructed the primary right-side door.
The investigation
The investigation examined the circumstances surrounding the engine's failure to respond to throttle applications. The pilot noted that the rate of descent following the engine stoppage, while configured with full flaps and a stationary propeller, was significantly higher than anticipated. The investigation also considered environmental factors, noting that the recent clearance of fog provided conditions that could facilitate the formation of ice within the induction system.