What happened
On 15 November 1998, a Glasair IIS RG, registration G-KSIR, was performing a private flight from Oxford Airport. During the takeoff sequence, as the aircraft reached a speed of approximately 60 knots, the landing gear unexpectedly retracted. This caused the aircraft to settle onto the runway surface. The incident resulted in minor damage to the exhaust pipe and the ADF aerial.
The investigation
Following the occurrence, the AAIB examined the circumstances surrounding the gear retraction. The investigation focused on the configuration of the landing gear lever at the time of the takeoff roll. The pilot reported that the takeoff roll had been initiated with the landing gear lever already set to the 'UP' position.