AN UNSECURED BAGGAGE CART WAS BLOWN INTO AN ACFT; BY A PARKING MD80.

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ACFT DAMAGE ON GND. OUR FLT TO LAX APPEARED UNEVENTFUL. THE CAPT TOLD ME THAT HE WAS JUST APCHED BY SOMEONE WHO TOLD HIM THAT THEY THOUGHT OUR ACFT'S JET EXHAUST HAD BLOWN AN EMPTY; UNSECURED CARGO CONTAINER SITTING ON THE RAMP INTO THE #1 ENG OF A B767 ACFT. AS I REMEMBER THE INCIDENT; WE ENTERED THE RAMP TO AN OPEN GATE WITH READY TAXI DIRECTORS. MY FOCUS AT THE TIME WAS TO ENSURE THAT WE HAD ADEQUATE WINGTIP CLRNC WITH OTHER ACFT AND RAMP EQUIP. I WAS NOT PAYING ATTN TO THROTTLE MOVEMENTS. WHAT I CAN SAY FOR SURE IS THAT I WOULD HAVE NOTICED IF EITHER OF THE ENGS HAD SPOOLED UP SIGNIFICANTLY. SUPPLEMENTAL INFO FROM ACN 614720: A SLOW DOWN TO A STOP WAS REQUIRED APPROX 1 ACFT LENGTH FROM GATE DUE TO THE WING WALKERS NOT COMPLETELY IN POS. THE GUIDEMAN WAS THERE; THE WING WALKERS WERE GETTING INTO POS AND THE PARKING BRAKE WAS NEVER SET UNTIL FULLY PARKED AT THE GATE. IDLE PWR NOT TO EXCEED (61% N2) WAS USED TO CONTINUE PARKING. MY RECOLLECTION WAS AROUND 58-60% N2 WAS USED TO KEEP THE ACFT MOVING. THE USE OF IDLE PWR AFTER BOTH STOPPING IN THE ALLEY OR STOPPING SHORT OF GATE WAS PERMITTED. TRAIN GUIDEMEN OF CLRING NOT ONLY WING CLRNCS; BUT ALSO CLRING BEHIND ACFT DURING TAXI-IN. I KNOW THEY PLACE GREAT IMPORTANCE ON PUSHBACK CLRING; BUT AN EMPHASIS SHOULD BE MADE FOR TAXI IN AND THE JET BLAST ASSOCIATED WITH IT.