Narrative:

How problem arose: veh allowed on runway 28 for runway check. Large transport on 8 mi final cleared to land on runway 28. Discovered: veh advised clear of runway and thanks for telling me that aircraft was landing. Contributing factors: field of vision midfield runway 28 obscured due to ramp lights on south concourse. Veh driver may have been out of veh west/O advising. Landing runway 28 with winds 100 degrees at 10 KTS, due RVR previously below minimums for runway 10 for 20 mins. Reduced visibility though runway was visible from tower. Aircraft ready for departure off runway 14, waiting aircraft to cross intersection landing runway 28. Local and ground control positions combined approximately 10 min. Corrective actions: none, large transport never advised seeing the veh at approximately midfield. Inactions by tower controller is the problem. Inactions of veh driver to advise position and question where the aircraft is he was told about prior to entering runway. Inactions of supervisor in tower to act as an extra pair of eyes. Factors: local controller who combined positions had been 2 hours on position at time of incident. Remained on position 20 more mins till relieved. Local control had been tower longer than people on other 3 positions. Traffic was slow, main interest shifted from veh on runway ot aircraft that wanted to depart runway 14 along with poor WX, braking and 10 KT tailwind.

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Original NASA ASRS Text

Title: LGT LANDED ON OCCUPIED RWY, TWR FORGOT ABOUT VEHICLE MAKING RWY CHECK.

Narrative: HOW PROB AROSE: VEH ALLOWED ON RWY 28 FOR RWY CHK. LGT ON 8 MI FINAL CLRED TO LAND ON RWY 28. DISCOVERED: VEH ADVISED CLR OF RWY AND THANKS FOR TELLING ME THAT ACFT WAS LNDG. CONTRIBUTING FACTORS: FIELD OF VISION MIDFIELD RWY 28 OBSCURED DUE TO RAMP LIGHTS ON S CONCOURSE. VEH DRIVER MAY HAVE BEEN OUT OF VEH W/O ADVISING. LNDG RWY 28 WITH WINDS 100 DEGS AT 10 KTS, DUE RVR PREVIOUSLY BELOW MINIMUMS FOR RWY 10 FOR 20 MINS. REDUCED VIS THOUGH RWY WAS VISIBLE FROM TWR. ACFT READY FOR DEP OFF RWY 14, WAITING ACFT TO CROSS INTXN LNDG RWY 28. LCL AND GND CTL POSITIONS COMBINED APPROX 10 MIN. CORRECTIVE ACTIONS: NONE, LGT NEVER ADVISED SEEING THE VEH AT APPROX MIDFIELD. INACTIONS BY TWR CTLR IS THE PROBLEM. INACTIONS OF VEH DRIVER TO ADVISE POS AND QUESTION WHERE THE ACFT IS HE WAS TOLD ABOUT PRIOR TO ENTERING RWY. INACTIONS OF SUPVR IN TWR TO ACT AS AN EXTRA PAIR OF EYES. FACTORS: LCL CTLR WHO COMBINED POSITIONS HAD BEEN 2 HRS ON POS AT TIME OF INCIDENT. REMAINED ON POS 20 MORE MINS TILL RELIEVED. LCL CTL HAD BEEN TWR LONGER THAN PEOPLE ON OTHER 3 POSITIONS. TFC WAS SLOW, MAIN INTEREST SHIFTED FROM VEH ON RWY OT ACFT THAT WANTED TO DEPART RWY 14 ALONG WITH POOR WX, BRAKING AND 10 KT TAILWIND.

Data retrieved from NASA's ASRS site as of August 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.