Slightly off-topic but in 2003 in a night-time KIAD blizzard, an Austrian A330 crew pushed back, clipped the tail of a United 777 while taxiing out but didn't stop until ramp tower relayed United's displeasure about their "hit and run" on one of their parked aircraft.
The gash in the 777's elevator measured about half a meter.
After a long wait for a contract mechanic to come out and look Austrian's wing while they remained on the taxiway (no one else was departing), they decided to press onward but never came back to the gate for another de-icing spray - even though they sat there for a good 45 to an hour in moderate to heavy snow OR to write up the wing strike in the logbook.
The whole kicker to this was that one of United's ramp employee's was taking pictures of the ramp operation that night and caught the whole thing in pictures (which is handily stored on my hard drive).
United's IAD management sure was ticked off that they hit one of their airplanes and didn't return to the scene. I don't know what became of that incident. Probably diplomatic immunity or some such nonsense.
