Narrative:

Our company recently revisited the necessity to have 2 wing walkers while taxiing aircraft into arrival gates. After completing our flight, I taxied in to the gate at terminal ZZZ, ewr airport. Both wing walkers were in place, indeed we waited until they were ready. During taxi in, we got a slow stop sign from marshaller, although well short of stop line. Apparently the right wingtip static wicks brushed against a maintenance truck that was improperly parked outside clear line. Wingtip observer was not paying attention or felt it would clear. It did not. Moral: if it looks close, move it. The only problem is in the cockpit, we can't see how close and have to rely on our ground crew.

Google
 

Original NASA ASRS Text

Title: AN MD80 TAXIING IN TO AN EWR GATE CONTACTED A MAINT TRUCK WITH THE STATIC WICKS WHILE UNDER THE DIRECTION OF WING WALKERS.

Narrative: OUR COMPANY RECENTLY REVISITED THE NECESSITY TO HAVE 2 WING WALKERS WHILE TAXIING ACFT INTO ARR GATES. AFTER COMPLETING OUR FLT, I TAXIED IN TO THE GATE AT TERMINAL ZZZ, EWR ARPT. BOTH WING WALKERS WERE IN PLACE, INDEED WE WAITED UNTIL THEY WERE READY. DURING TAXI IN, WE GOT A SLOW STOP SIGN FROM MARSHALLER, ALTHOUGH WELL SHORT OF STOP LINE. APPARENTLY THE R WINGTIP STATIC WICKS BRUSHED AGAINST A MAINT TRUCK THAT WAS IMPROPERLY PARKED OUTSIDE CLR LINE. WINGTIP OBSERVER WAS NOT PAYING ATTN OR FELT IT WOULD CLR. IT DID NOT. MORAL: IF IT LOOKS CLOSE, MOVE IT. THE ONLY PROB IS IN THE COCKPIT, WE CAN'T SEE HOW CLOSE AND HAVE TO RELY ON OUR GND CREW.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.