What happened
On 17 July 2006, a Mainair Blade, registration G-MZIW, was conducting a private flight when the pilot experienced an unexpected jolt through the airframe and controls approximately ten minutes into the flight. Suspecting a potential failure in the rigging or another component, the pilot initiated a gentle descent toward a large field for a precautionary landing.
Upon attempting a left turn onto the final approach, the pilot noted that the aircraft felt heavy and resistant to the turn. In an effort to maintain control, the pilot increased the bank angle and airspeed. This maneuver caused a rapid loss of altitude, making it impossible to clear the nearby trees. The pilot leveled the wings and applied full power while pushing the control bar forward to avoid the obstacle. However, the aircraft struck the tree canopy and fell into a coppice. The aircraft came to rest in a dry stream bed. The pilot managed to evacuate the aircraft and assist the passenger, who sustained serious injuries, while the pilot suffered minor injuries.
The investigation
An official from the BMAA examined the wreckage at the scene and later conducted a detailed inspection at the manufacturer's premises. The investigation confirmed that all rigging wires were intact and no pre-impact structural failures were evident. The damage observed on the left wing and trike unit was consistent with the forces of the impact. The investigation also noted that the aircraft was moderately heavily loaded and the ambient temperature was high at the time of the incident.
Findings
- The aircraft was airworthy and structurally sound prior to the impact.
- The cause of the initial mid-flight jolt could not be determined.
- The pilot's attempt to increase bank and airspeed during the turn resulted in a rapid loss of height.