Narrative:

After an uneventful landing we dropped off five passengers. We were to continue on with three more passengers and stay at our destination for the night. While I was dealing with handlers my co-pilot did a brief walk around and we both prepared for the next leg of the trip.we received clearance from tower and started to taxi. As soon as we moved we received a nose wheel steering fault message. I stopped the aircraft and we cleared the fault by resetting the nose wheel virtual circuit breaker as per guidelines from the manufacturer and we continued to taxi to the runway. Once cleared for takeoff we did a rolling departure. At about 50 or 60 KTS we had an anti-skid fail light come on; disappear and re-post. I decided to take the issue into the air since we have had many erroneous cas messages since we took possession of the aircraft over two years ago. We have become accustomed to messages posting then clearing themselves.we departed on runway heading and climbed to three thousand feet and were cleared to proceed on course. I instructed the co-pilot to use the check list and see if we could clear the fault but he was unable to do so. I made the decision to return to the departure airport since with an anti-skid failure we had to multiply landing distance by 1.4 and the runway at our departure was two thousand feet longer then our destination runway.we were vectored to a ten mile final for the runway. On touch down we use thrust reversers and ground spoilers only. I did not touch the brakes until around thirty knots. The aircraft handled as a normal landing. I felt nothing out of the ordinary while on the ground. We turned off the runway and proceeded to general aviation ramp. Once parked and both engines shut down; the co-pilot went out to check the brake system while I did an APU shutdown. When he came back he advised the right main outboard wheel had come completely off the axle. I called the tower immediately to inform them that it might still be on the runway and to send personnel out to look for the missing wheel. After evaluation of pictures sent to our maintenance department it has been established that the wheel came off due to a catastrophic failure of the outboard wheel bearing.

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Original NASA ASRS Text

Title: After shrugging off CAS warnings on nose wheel steering and the antiskid system--the latter during the takeoff roll at 50 -60 KTS--the flight crew of an HA4T had to return to the departure airport due to its longer runway. Upon landing they discovered the right outboard main gear wheel had separated from the aircraft.

Narrative: After an uneventful landing we dropped off five passengers. We were to continue on with three more passengers and stay at our destination for the night. While I was dealing with handlers my co-pilot did a brief walk around and we both prepared for the next leg of the trip.We received clearance from Tower and started to taxi. As soon as we moved we received a Nose Wheel Steering Fault message. I stopped the aircraft and we cleared the fault by resetting the nose wheel virtual circuit breaker as per guidelines from the manufacturer and we continued to taxi to the runway. Once cleared for takeoff we did a rolling departure. At about 50 or 60 KTS we had an anti-skid fail light come on; disappear and re-post. I decided to take the issue into the air since we have had many erroneous CAS messages since we took possession of the aircraft over two years ago. We have become accustomed to messages posting then clearing themselves.We departed on runway heading and climbed to three thousand feet and were cleared to proceed on course. I instructed the co-pilot to use the check list and see if we could clear the fault but he was unable to do so. I made the decision to return to the departure airport since with an anti-skid failure we had to multiply landing distance by 1.4 and the runway at our departure was two thousand feet longer then our destination runway.We were vectored to a ten mile final for the runway. On touch down we use thrust reversers and ground spoilers only. I did not touch the brakes until around thirty knots. The aircraft handled as a normal landing. I felt nothing out of the ordinary while on the ground. We turned off the runway and proceeded to general aviation ramp. Once parked and both engines shut down; the co-pilot went out to check the brake system while I did an APU shutdown. When he came back he advised the right main outboard wheel had come completely off the axle. I called the Tower immediately to inform them that it might still be on the runway and to send personnel out to look for the missing wheel. After evaluation of pictures sent to our Maintenance Department it has been established that the wheel came off due to a catastrophic failure of the outboard wheel bearing.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.