Aircraft landed on runway occupied by vehicle.

Attributes
ACN	128908
Time
Date	198911
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mke
State Reference	WI
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : ground
Qualification	controller : radar
ASRS Report	128908
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller radar : 6
ASRS Report	129735
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : published procedure other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working ground control with heavy snow falling and low visibility and ceilings. I requested and received permission from local control for a county veh to proceed on runway 1L for a runway check. There was an inbound to the runway approximately 20 mi out, but RVR's were dropping and was not sure he would attempt a landing. Aircraft landed while veh still on runway. Things which could have prevented incident: 1) county should have closed runway due to 4' of snow, centerline lights obscured, county not plowing because of low visibility for drivers, and numerous reports of bad runway condition. 2) I feel the veh should have been on local control's frequency rather than ground. Even if controller would have forgotten, veh could have heard the transmission for cleared to land, then questioned local control. Supplemental information from acn 129735: I was working local control at mke. Ground asked for clearance to drive a veh on runway 1L. I issued appropriate clearance to ground control. Air carrier X reported over cappy OM for landing. I issued landing clearance. Aircraft landed with veh on the runway.

Original NASA ASRS Text

Title: ACFT LANDED ON RWY OCCUPIED BY VEHICLE.

Narrative: I WAS WORKING GND CTL WITH HEAVY SNOW FALLING AND LOW VISIBILITY AND CEILINGS. I REQUESTED AND RECEIVED PERMISSION FROM LCL CTL FOR A COUNTY VEH TO PROCEED ON RWY 1L FOR A RWY CHK. THERE WAS AN INBND TO THE RWY APPROX 20 MI OUT, BUT RVR'S WERE DROPPING AND WAS NOT SURE HE WOULD ATTEMPT A LNDG. ACFT LANDED WHILE VEH STILL ON RWY. THINGS WHICH COULD HAVE PREVENTED INCIDENT: 1) COUNTY SHOULD HAVE CLOSED RWY DUE TO 4' OF SNOW, CENTERLINE LIGHTS OBSCURED, COUNTY NOT PLOWING BECAUSE OF LOW VISIBILITY FOR DRIVERS, AND NUMEROUS RPTS OF BAD RWY CONDITION. 2) I FEEL THE VEH SHOULD HAVE BEEN ON LCL CTL'S FREQ RATHER THAN GND. EVEN IF CTLR WOULD HAVE FORGOTTEN, VEH COULD HAVE HEARD THE XMISSION FOR CLRED TO LAND, THEN QUESTIONED LCL CTL. SUPPLEMENTAL INFO FROM ACN 129735: I WAS WORKING LCL CTL AT MKE. GND ASKED FOR CLRNC TO DRIVE A VEH ON RWY 1L. I ISSUED APPROPRIATE CLRNC TO GND CTL. ACR X RPTED OVER CAPPY OM FOR LNDG. I ISSUED LNDG CLRNC. ACFT LANDED WITH VEH ON THE RWY.

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.