Williams has been fined €60,000 by the FIA for an unsafe release of Pastor Maldonado in FP2 in India.
A wheel nut came loose and rolled across the track after the Venezuelan left the pits. However the wheel – the right front – was retained, and he continued on round before finally stopping close to the pit entry.
In Suzuka Maldonado lost a wheel during practice. The FIA regarded it as a “serious safety issue,” fined the team €60,000, and ensured that modifications were made to the wheel retaining system.
This time the FIA made it clear that the penalty would have been higher had the wheel not been retained, and the stewards also noted that the problem was triggered by an accidental cross-threading.
Apart from the unsafe release they also noted that the secondary retaining plunger had failed to keep the wheel fastener in place, which is a breach of the technical regulations.
They said: “The team need to ensure that both the wheel and its fastener are fully retained on the car. The Stewards decide that a fine of €60,000 is the most appropriate penalty in this case taking into account this was the second offence, but on this occasion the wheel was retained.”
Adam Cooper F1 
Does this mean that it was only by luck that the wheel stayed on the car, or did the retention mechanism do this part of the job?
I suppose a loose wheel nut could potentially be more deadly than a runaway wheel.