Narrative:

I had relieved the controller at the approach/departure radar scope. We were on cenrap since rockford's radar was OTS. A C182 was an overflt through my airspace from vicinity of rockford airport to mke at 7000 ft. I had accepted one handoff on an aircraft from ZAU, love rock sector. That HS125 was descending to 6000 ft. I lost the data block and radar on the aircraft. I was concerned about his position and altitude, so told him to proceed direct jvl VORTAC, due to another aircraft in his vicinity, IFR, sbound at 6000 ft separated, but on converging courses. I vectored the C182 090 degrees. The HS125 reported over jvl at 6000 ft, so I instructed the cessna to resume own navigation on course to mke. I became busy with splitting off the west portion of rfd airspace to the west radar controller. The C182's data block and radar was lost. I noticed the C182 was 5 mi into mke approach's airspace. I called mke on the short line to affect a handoff, with no response. At the same time I initiated an automated handoff. Mke accepted the handoff. The C182 entered mke's airspace without a handoff due to loss of radar on the aircraft, the additional workload due to poor radar, the fact he was on a frequency no longer being used by me, and that we were doing a position briefing to open a second radar position. The flight data person had been training on that position, but closed flight data to open the next radar position. A flight data person was needed during the transition. Afterwards cenrap was determined to be unusable and rfd secondary radar was returned for our use.

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Original NASA ASRS Text

Title: C182 ENTERED AN ADJACENT FACILITY'S AIRSPACE WITHOUT COORD OR HDOF AFTER RPTR LOST RADAR CONTACT WITH THE ACFT AND AN ATTEMPTED VERBAL HDOF.

Narrative: I HAD RELIEVED THE CTLR AT THE APCH/DEP RADAR SCOPE. WE WERE ON CENRAP SINCE ROCKFORD'S RADAR WAS OTS. A C182 WAS AN OVERFLT THROUGH MY AIRSPACE FROM VICINITY OF ROCKFORD ARPT TO MKE AT 7000 FT. I HAD ACCEPTED ONE HDOF ON AN ACFT FROM ZAU, LOVE ROCK SECTOR. THAT HS125 WAS DSNDING TO 6000 FT. I LOST THE DATA BLOCK AND RADAR ON THE ACFT. I WAS CONCERNED ABOUT HIS POS AND ALT, SO TOLD HIM TO PROCEED DIRECT JVL VORTAC, DUE TO ANOTHER ACFT IN HIS VICINITY, IFR, SBOUND AT 6000 FT SEPARATED, BUT ON CONVERGING COURSES. I VECTORED THE C182 090 DEGS. THE HS125 RPTED OVER JVL AT 6000 FT, SO I INSTRUCTED THE CESSNA TO RESUME OWN NAV ON COURSE TO MKE. I BECAME BUSY WITH SPLITTING OFF THE W PORTION OF RFD AIRSPACE TO THE W RADAR CTLR. THE C182'S DATA BLOCK AND RADAR WAS LOST. I NOTICED THE C182 WAS 5 MI INTO MKE APCH'S AIRSPACE. I CALLED MKE ON THE SHORT LINE TO AFFECT A HDOF, WITH NO RESPONSE. AT THE SAME TIME I INITIATED AN AUTOMATED HDOF. MKE ACCEPTED THE HDOF. THE C182 ENTERED MKE'S AIRSPACE WITHOUT A HDOF DUE TO LOSS OF RADAR ON THE ACFT, THE ADDITIONAL WORKLOAD DUE TO POOR RADAR, THE FACT HE WAS ON A FREQ NO LONGER BEING USED BY ME, AND THAT WE WERE DOING A POS BRIEFING TO OPEN A SECOND RADAR POS. THE FLT DATA PERSON HAD BEEN TRAINING ON THAT POS, BUT CLOSED FLT DATA TO OPEN THE NEXT RADAR POS. A FLT DATA PERSON WAS NEEDED DURING THE TRANSITION. AFTERWARDS CENRAP WAS DETERMINED TO BE UNUSABLE AND RFD SECONDARY RADAR WAS RETURNED FOR OUR USE.

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.