Flight Crew Air Transport Pilot (ATP)
ATC Issue All Types
Flight Crew Rejected Takeoff
ATC Equipment / Nav Facility / Buildings
During a normal take-off roll going through approximately 85 knots tower gave direction to reject the take-off; 'take-off clearance is cancelled; abort take-off.' At which time the Captain rejected the take-off; uneventfully. As the take-off was rejected at approximately 85-90 knots we cleared the runway; taxied to a gate and maintenance inspected the aircraft. We were cleared by maintenance and resumed operations. During the maintenance inspection as we waited at the gate the Captain contacted the tower and we were informed that their Airport Surface Detection Equipment ground surveillance radar had sounded an alarm in the tower which they were compelled to address by calling for us to reject the take-off. Tower informed us that no visual conflict was noticed but the alarm had to be followed. No other deviation or aircraft issue was noticed therefore we decided to continue operations.
We were cleared for takeoff by lax tower. At about 80 knots tower told us takeoff clearance was cancelled and to reject takeoff. We had reached approximately 90 knots when reject was started. We cleared runway and asked tower the reason for the reject. They told us they had received an false ground radar alert and could see there was no conflict; but it is a requirement to still call the reject. We called maintenance ; returned to gate for a high speed reject inspection. Maintenance cleared us for flight and we continued approximately 45 minutes later.
Air Carrier flight crew reported they rejected a takeoff at LAX when the Tower Controller cancelled takeoff clearance and called abort. The crew reported the ATC ground surveillance radar had sounded a false alarm.