ATC EQUIP PROB RADAR ASR-9. THIS PROB IS ONGOING.

Narrative

ASR-9 AT SLC FAILED! WE WERE DOWN FOR ABOUT 40 MINS AND HAD TO USE ZLC BACKUP. THIS PROB HAS BEEN HAPPENING SINCE MID APRIL. FAA SAYS IT'S A PWR SUPPLY PROB. SUPPLEMENTAL INFO FROM ACN 306265: THE ASR-9 RADAR AT SLC HAS FAILED 4 TIMES IN 1 WK. 2 OF THESE TIMES HAVE BEEN DURING BUSY TFC PERIODS. SAFETY IS THE BIG ISSUE WITH THIS RPT AND THE SAVING FACTOR DURING THE RADAR OUTAGES IS THE ARPT WAS VFR. CALLBACK CONVERSATION WITH RPTR ACN #306417 REVEALED THE FOLLOWING INFO: RPTR STATED THE ASR-9 WOULD FAIL THEN THE CENRAP WOULD NOT COME UP. THIS WAS DUE TO THE EMER GENERATOR. UCR WAS FILED. FAA MAINT WAS INVESTIGATING THE PROB. TRACON PROCS OFFICER STATED THE PROB WAS ONGOING. THE STANDBY PWR EMER GENERATOR HAD A FUEL FILTER PROB WHICH CAUSED A LOSS OF PWR TO THE RADAR AND BURNED UP THE GENERATOR. A TEMPORARY GENERATOR WAS BROUGHT IN BUT WOULD NOT CUT IN UNLESS THE COMMERCIAL PWR FAILED. FACILITY IS NOW TURNING ON THE GENERATOR BUT NOT CHANGING TO STANDBY GENERATOR. THIS SEEMS TO HAVE TEMPORARILY SOLVED PROB. CENRAP IS AVAILABLE BUT TAKES ABOUT 5 MINS TO BRING UP. THIS WOULD ALSO SCATTER IF BOTH PWR SOURCES WERE ON LINE.