So this is pretty interesting since there aren't actually A330's in the fleet without J (and the two old cabin ones are in QPG and HKG). I would wonder if this is actually the frame that AC was going to take from SQ and then didn't. It has been parked in storage since AC didn't take it up.

That the layout is 2-2-2 would suggest it is an older J seat rather than PY as PY would be 2-3-2. It will probably be similar to the layout that is in the A330 refurbishment thread. Is AC that hard up for lift that they won't refurbish it prior to bringing it into service?