What happened
On 23 February 2008, a Cessna 172M Skyhawk, registration G-TRIO, was conducting a private cross-country flight from Rochester. The pilot, accompanied by one passenger, had planned a one-hour route toward Ashford and Dover. Although the pilot initially believed the weather would allow for flight at 2,000 ft amsl, the local conditions were deteriorating due to a moving warm front.
While flying east, the pilot encountered a dense layer of cloud. In an attempt to remain clear of the cloud and regain visual flight conditions, the pilot initiated a left turn and a descent. During this maneuver, the aircraft' $\text{altitude}$ dropped significantly; the pilot noted the altimeter reading approximately 650 ft amsl as trees became visible ahead. The aircraft struck a series of trees, causing substantial damage to the airframe, including the separation of the right wing components and the engine tearing from its mounts. Both occupants escaped the wreckage with minor injuries.
The investigation
Investigators examined the wreckage and analyzed radar and meteorological data. The investigation established that the aircraft was in a right-hand bank of at least 35 degrees at the moment of the initial impact. While the pilot intended to fly at 2,000 ft, radar evidence indicated the flight was actually conducted below 1,500 ft amsl for much of the duration.
Examination of the aircraft confirmed that the engine was functioning and the flight controls were intact prior to the impact. The investigation also looked into the pilot's recent history and the impact of external factors on the flight's progression.
Findings
- The aircraft struck a succession of trees while the pilot was attempting to descend and turn to avoid cloud.
- The pilot's decision to continue the flight despite deteriorating conditions, and the delay in turning back, contributed to the accident.
- The pilot's descent into the cloud layer led to a loss of visual reference and subsequent impact with obstacles.
- The possibility that cannabis use may have impaired the pilot's judgment or ability to manage complex tasks during the emergency could not be ruled out.