I actually was watching the two aircraft at the time from about half way down 27L on the cargo stands, I was also listening in on ATC.
The Air Jamaica was stationary with the UA
pulling along side.
From the conversation that followed on ATC neither flightcrew seemed to be aware of what happened. The incident was reported to the Air Jamaica flight crew by a flight attendant from the rear of the aircraft.
crew said that they were unaware whether they had hit anything.
ATC then sent out a leader van to inspect the two aircraft and reported that the 343 had been hit and that debris was on the ground.
Both aircraft were then advised to return to stand by ATC by means of following the leader van. As a result of this the runway was out of use for about 7 or 8 minutes.
I wasn't able to go and have a look at the two aircraft as I was just finishing my shift but there was no major damage visible from where I was (About 800 yards at closest point).
Glad everyone was ok and it's nice to see the flight attendant was so safety conscious especially as the crew hadn't noticed.
Flown on A300B4/600,A319/20/21,A332/3,A343,B727,B732/3/4/5/6/7/8,B741/2/4,B752/3,B762/3,B772/3,DC10,L1011-200,VC10,MD80,