B737 ACFT HIT GND EQUIP WHILE BEING MARSHALLED TO THE GATE.

Narrative

I TAXIED TO THE GATE; STARTED MY TURN IN ON THE TAXI LINE AND FOLLOWED THE MARSHALLER'S SIGNALS. AS HE GAVE ME THE STOP SIGNAL; WE FELT A BUMP AND THE FO AND I LOOKED AT EACH OTHER IN WONDER. THE MARSHALLER THEN GAVE A NORMAL 'CHOCKS IN' SIGNAL AND I COULD ONLY ASSUME THAT ALL WAS OK. I VERBALLY TOLD THE FO THAT THEY MUST HAVE HAD A CHOCK TOO CLOSE TO THE LINE AND WE BUMPED IT PRIOR TO STOPPING. I TRIED TO GO OUTSIDE TO CHK THE ACFT; BUT COULD NOT; DUE TO THE JETWAY DOOR BEING BLOCKED; SINCE THE JETWAY WAS NOT PULLED OUT TO ITS NORMAL LENGTH. I MET THE STATION MGR WHO HAD OBSERVED THE PARKING FROM ANOTHER GATE JETWAY AND HAD SEEN US HIT THE GND HANDLING EQUIP. I WENT DOWN THE JETWAY FOR OTHER GATE TO SEE THE ACFT AND OBSERVED THE GND EQUIP APPROX 1 FT UNDER THE L WING AND A PUNCTURE IN THE FIBERGLASS PORTION OF THE WINGTIP. I CHKED THE POS OF THE ACFT AND NOTED THAT THE NOSE GEAR WAS ON THE LEAD-IN LINE AND WAS PARKED BTWN 6 AND 7 FT AHEAD OF THE B737 STOP LINE. IT WAS PARKED ON THE B767/320 STOP LINE. IT WAS OBVIOUS THAT IF THE ACFT HAD BEEN STOPPED IN THE CORRECT POS; THE INCIDENT WITH THE WINGTIP WOULD NOT HAVE OCCURRED. THE JUMP SEATER ON MY FLT WAS AN FAA INSPECTOR. HE OBSERVED THE ENTIRE PARKING PROC FROM THE JUMP SEAT AND WAS ABLE TO MONITOR ALL RADIO XMISSIONS ON BOTH RADIOS.