English: Date of occurrence: 21 August 2009

Aircraft category: Commercial - fixed wing
Report type: Bulletin - Correspondence investigation
Aircraft type: Cessna Citation Mustang
Location: Runway 23 at Cambridge Airport
Registration: PH-TXI

The landing gear was not lowered on the downwind leg. The co-pilot flared for touchdown and there was a “grinding” sound from the rear of the aircraft. The commander took control and went around and the aircraft landed subsequently without further incident. The landing gear warning horn had been triggered on the downwind leg and had been cancelled by the commander. The co-pilot remembered hearing the landing gear warning horn again briefly during the final approach. The commander, however, believed that the warning system had not reset and there had been no further warning. It was not possible to determine with any certainty whether or not the warning system had reset.