What happened
On 16 August 2006, a Cessna 150L, registration G-AYKL, was departing from the grass runway at Netherthorpe Airfield for a local flight. Following routine inspections and refueling, the pilot performed standard engine and pre-takeoff checks. The aircraft was operating near its maximum takeoff weight with the center of gravity positioned near the middle of its permitted range.
During the takeoff roll on Runway 24, the aircraft initially accelerated normally. However, as the aircraft reached the intersection of the two runways, the rate of acceleration decreased. The pilot attempted to maintain airspeed by lowering the nose, but shortly after liftoff, engine power appeared to diminish. While climbing to approximately 50 feet, the pilot again attempted to increase airspeed by lowering the nose. During this maneuver, the right wing dropped, causing the aircraft to strike the ground in a grass field. The impact caused severe damage to the propeller, fuselage, and wings. Both the pilot and the passenger sustained minor injuries and were able to exit the aircraft via the normal doors.
The investigation
The investigation examined the aircraft's performance capabilities, weight and balance, and the environmental conditions at the time of the accident. The airfield surface was dry, hard, and recently mown. While the exact ambient temperature was not recorded, the pilot described the weather as warm. The investigation also reviewed the pilot's use of 10-degree flaps, which had been used successfully in similar conditions on previous flights.
Findings
- The aircraft was operating at a weight very close to its maximum takeoff limit.
- A loss of engine power and subsequent loss of control occurred as a result of the pilot attempting to maintain or increase height, leading to a stall.
- No specific cause for the reduction in engine power could be identified during the investigation.