What happened
On 26 May 2003, a Cessna 120, registration G-AJJT, was performing practice circuits at East Pennard Farm Strip near Shepton Mallet. After two unsuccessful approaches due to speed and positioning concerns, the pilot attempted a third approach. Although the aircraft was traveling approximately 5 mph faster than desired, the pilot proceeded with the landing.
Upon touchdown, the aircraft floated further down the strip than usual. As the pilot attempted to monitor the remaining runway length, the necessity of leaning forward to see past the engine cowling caused a reduction in backpressure on the control column. During the subsequent rollout, the pilot applied the brakes with more force than intended, resulting in locked wheels and a three-metre skid. At a speed of roughly 20 mph, the aircraft tipped forward, causing the propeller to strike the ground. This impact broke the wooden propeller and stalled the engine, after which the aircraft continued to roll until it came to rest on its roof.
The investigation
The investigation examined the sequence of events leading to the loss of control and the physical state of the aircraft. It was noted that the pilot, while attempting to extricate himself from the overturned cockpit, may have inadvertently flipped several electrical switches, including the master switch, back to the 'ON' position. The investigation also reviewed the pilot's recent flying history and experience with tail-wheel aircraft on short, grass runways.
Findings
- The pilot's attempt to view the end of the strip caused a reduction in backpressure on the control column.
- Excessive braking force led to wheel lock-up and a forward skid.
- The pilot had limited experience operating from short grass strips, having primarily flown tail-wheel aircraft on paved runways.
- The pilot's decision to brake was driven by difficulty in judging the remaining distance to the airfield boundary due to restricted forward visibility.
- The aircraft sustained damage to the wing, strut, windscreen, and fin.
- No injuries were sustained by the pilot, aided by the effective use of a modified diagonal seat strap.