Sabena Airbus A330-301 OO-SFM was being towed from a gate to a maintenance facility at Brussels' Zaventeem Airport when the driver of the TUG lost directional control on the slippery ground surface. The aircraft slid out of control and impacted Sobelair Boeing 737-329 OO-SBZ near rows 17/18, puncturing a large hole in the fuselage of the 737. Both Sabena crewmembers aboard the A330 were uninjured, and both aircraft were repaired and subsequently returned to service.