CTLR CLAIMS THAT MODE C JUMPING OR ERRONEOUS ALT INDICATED IS CAUSING PROBLEMS.

Narrative

WAS OBSERVING ERRONEOUS MODE C READOUT OF AN ADDITIONAL ACFT DEPARTING TPA AND WAS DISTRACTED FROM THE NORMAL FLOW OF TFC. THE 2 ACFT SHOULD NOT HAVE BEEN IN THE SAME AREA AND MINOR EVASIVE ACTION DELAYING THE ARR WAS ACCOMPLISHED IN TIME TO RESOLVE ANY CONFLICT. THE 'JUMPING' OF MODE C ALTS IS BECOMING A CONTINUAL PROBLEM AND IS BEGINNING TO ERODE THE CONFIDENCE OF THE BEACON SYS. TPA FORM 6190-2; 'ARTS PROBLEM RPT' WAS COMPLETED AND GIVEN TO THE AREA MGR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR CLAIMS THAT THIS IS STILL AN ONGOING PROBLEM. THEY HAVE 2 RADAR SITES WITH 1 OF THEM DIGITIZED. THE ERRONEOUS MODE C GENERALLY HAPPENS WITH EVERY THIRD ACFT. MOST CTLRS HAVE BECOME USED TO WORKING WITH THIS PROBLEM; SO THERE HAS NOT BEEN ANY RPTED INCIDENTS. THE ERRONEOUS ALT USUALLY LASTS FROM 30 SECONDS TO 1 MIN. FACILITY IS TRACKING THE PROBLEM; BUT IT HAS BEEN ONGOING FOR ABOUT 3 YRS. UCR WAS FILED 4 WKS AGO. RPTR STATES THE FACILITY MGMNT IS GOOD TO WORK WITH; BUT THEY APPARENTLY DO NOT THINK THAT THIS IS A SAFETY ISSUE. TRACK DROPPING WAS ANOTHER PROBLEM FOR AWHILE; HOWEVER; AIRWAY FACILITIES DISCOVERED THAT A NEW BUILDING IS BEING CONSTRUCTED NEARBY WAS CAUSING THE PROBLEM AND ARE IN THE PROCESS OF RECTIFYING IT NOW. RPTR ALSO STATED THAT 2 FACILITY 'ARTS PROBLEM RPT' FORMS HAVE BEEN SUBMITTED ON THIS.