DHC-6 Twin Otter Series 310, G-BVVK and Embraer EMB-145EU, G-EMBV
A DHC6 Twin Otter aircraft was stationary at the Y1 holding point at Glasgow Airport. Its flight crew had correctly acknowledged a clearance from ATC to cross Runway 23, which was the active runway, after the landing Embraer 145. The DHC 6 crew having discussed some training issues, thought that the Embraer 145 had landed and began to taxi to Y2. As they were about to enter Runway 23 the commander saw the Embraer 145 about to touch down and so he reversed the aircraft back towards Y1. Due to the mode selected, a Runway Incursion Monitoring and Confliction Alerting Sub-system (RIMCAS) which was in use at the time of the incident did not provide an alert.