Narrative:

After clearing runway 28R at sfo, PIC was cleared to taxi to parking via taxiway K and taxiway C to the ramp on tower frequency. As aircraft was proceeding north into west entrance to the ramp, a maintenance truck on the vehicle access road failed to stop and impacted the aircraft on right wing. Aircraft was secured at point of impact. Driver of the truck backed truck away from aircraft. Driver failed to see aircraft. Medical attendant in copilot seat saw vehicle just before impact, but was unable to stop event. The NTSB was notified of this incident. Contributing factors: 1) taxiway and road were wet and black. Vision was difficult because of glare. 2) taxiway and roadway markings were washed out. 3) airport authority/authorized had closed east entrance onto ramp because of damage to drainage system. Entrance and ramp were coned off for about 200 ft. However, they did not appear to have relocated the stop sign at east entrance. This condition has existed for several months. 4) ramp did not provide follow-me support. Corrective actions: 1) airport authority/authorized should place stop signs on roadway in each direction at both entrances to ramp. 2) airport authority/authorized should fix east entrance to ramp as soon as possible.

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Original NASA ASRS Text

Title: A TWIN ENG MEDICAL FLT IS RAMMED ON THE R WING BY A MAINT VEHICLE THAT DID NOT SEE THE ACFT DURING ITS TAXI INTO THE W ENTRANCE OF THE FBO AT SFO, CA.

Narrative: AFTER CLRING RWY 28R AT SFO, PIC WAS CLRED TO TAXI TO PARKING VIA TXWY K AND TXWY C TO THE RAMP ON TWR FREQ. AS ACFT WAS PROCEEDING N INTO W ENTRANCE TO THE RAMP, A MAINT TRUCK ON THE VEHICLE ACCESS ROAD FAILED TO STOP AND IMPACTED THE ACFT ON R WING. ACFT WAS SECURED AT POINT OF IMPACT. DRIVER OF THE TRUCK BACKED TRUCK AWAY FROM ACFT. DRIVER FAILED TO SEE ACFT. MEDICAL ATTENDANT IN COPLT SEAT SAW VEHICLE JUST BEFORE IMPACT, BUT WAS UNABLE TO STOP EVENT. THE NTSB WAS NOTIFIED OF THIS INCIDENT. CONTRIBUTING FACTORS: 1) TXWY AND ROAD WERE WET AND BLACK. VISION WAS DIFFICULT BECAUSE OF GLARE. 2) TXWY AND ROADWAY MARKINGS WERE WASHED OUT. 3) ARPT AUTH HAD CLOSED E ENTRANCE ONTO RAMP BECAUSE OF DAMAGE TO DRAINAGE SYS. ENTRANCE AND RAMP WERE CONED OFF FOR ABOUT 200 FT. HOWEVER, THEY DID NOT APPEAR TO HAVE RELOCATED THE STOP SIGN AT E ENTRANCE. THIS CONDITION HAS EXISTED FOR SEVERAL MONTHS. 4) RAMP DID NOT PROVIDE FOLLOW-ME SUPPORT. CORRECTIVE ACTIONS: 1) ARPT AUTH SHOULD PLACE STOP SIGNS ON ROADWAY IN EACH DIRECTION AT BOTH ENTRANCES TO RAMP. 2) ARPT AUTH SHOULD FIX E ENTRANCE TO RAMP ASAP.

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.