I rather wonder what would happen if this...
"EAD 2007 - 0188R1: Two A330 operators have reported
uncontained APU generator failures on ground. (...)"
... occurs in flight.
Restricting APU use in flight will not only save fuel but also minimize the risk of a 24000rpm rotor and hot oil roaming through the rear end of your plane in flight...
Regards,
J.V.