About 6 or 7 years ago a Transaer A320 reg EI-TLI had the exact same occurence closing Dublin Airport for a few hours as it blocked the main runway . The NLG assy was replaced. Airbus said to replace both LGCIU's and BSCU's and send the old ones to Airbus for Investigation There were no faults on the PFR for Lgciu or Bscu and all bite tests were ok +when new leg fitted to A/C steering test ok. So the boxes were replaced anyway and sent the old ones away to France. Never did hear the outcome of the Airbus Investigation although very soon after that Lgciu's & Bscu's were modded to a higher dash no part no so although Airbus didn't admit liability in the design of the system you can draw your own conclusions