What happened
On 24 February 2017, a Vans RV-8, registration G-CHPK, was conducting a private flight when the pilot identified engine irregularities. After a routine takeoff, the pilot noticed mild engine vibrations while climbing through approximately 1,500 ft. This prompted a decision to return to Bidford Airfield.
During the downwind leg of the approach to Runway 24, the pilot observed a significant discrepancy in engine temperatures. The exhaust gas temperature (EGT) for the number 4 cylinder dropped to 150ºF, whereas the remaining three cylinders were operating at approximately 1,500ºF. To manage the descent, the pilot utilized a glide approach involving sideslips to regulate altitude.
As the aircraft entered the flare and landing phase, the sun's position obscured the pilot's view. This loss of visual reference led to the aircraft running off the side of the runway and into a ploughed field, where the aircraft subsequently tipped onto its nose. There were no injuries to the pilot.
The investigation
The investigation focused on the mechanical discrepancies noted during the flight and the circumstances of the landing. The examination established that the engine had suffered a shock-load, and the aircraft sustained damage to the propeller, firewall, and wheel spats.