Narrative:

I am an fpl controller at cleveland center (ZOB). For the past several weeks, we have had problems with frequency 120.025. There is 'bleedover' from other frequencys, 'noise', garbled backgnd talk, and 'other voices'. At many times it is unreadable. Quite a few pilots have complained as have dozens of controllers. Nothing was done to fix the problem. On nov/xx/94 1 jet wbound on J60 at FL310 going to denver and another jet nwbound on J211 at FL310 landing cle. It is standard procedure to descend the cle inbound jet to FL240 after he enters the sector. I tried to descend the cle jet but got no response. I called several other planes with no answers. The adjacent sector activated their switch for 120.025 and also got no response. The frequency quit! Then it began coming and going. We were able to broadcast through a 3RD jet to climb the den jet to FL330 and descend the cle jet to FL240. Ntap was inconclusive as to loss of separation. Regardless, the frequency should have been removed from service long ago due to the continuous problems associated with it. It took an near midair collision to finally get management's attention. Callback conversation with reporter revealed the following information: reporter says that this is still a problem. It has the most impact on pilots, but occasionally the controller can also hear it. Reporter thinks a ucr was filed. Facility had it checked a while back and believe that pvd approach control is feeding through. Doesn't know why facility will not swap this frequency for another to eliminate the problem. This is a high altitude sector.

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Original NASA ASRS Text

Title: FREQ FEED THROUGH ON HIGH ALT SECTOR IMPACTS TFC.

Narrative: I AM AN FPL CTLR AT CLEVELAND CTR (ZOB). FOR THE PAST SEVERAL WKS, WE HAVE HAD PROBS WITH FREQ 120.025. THERE IS 'BLEEDOVER' FROM OTHER FREQS, 'NOISE', GARBLED BACKGND TALK, AND 'OTHER VOICES'. AT MANY TIMES IT IS UNREADABLE. QUITE A FEW PLTS HAVE COMPLAINED AS HAVE DOZENS OF CTLRS. NOTHING WAS DONE TO FIX THE PROB. ON NOV/XX/94 1 JET WBOUND ON J60 AT FL310 GOING TO DENVER AND ANOTHER JET NWBOUND ON J211 AT FL310 LNDG CLE. IT IS STANDARD PROC TO DSND THE CLE INBOUND JET TO FL240 AFTER HE ENTERS THE SECTOR. I TRIED TO DSND THE CLE JET BUT GOT NO RESPONSE. I CALLED SEVERAL OTHER PLANES WITH NO ANSWERS. THE ADJACENT SECTOR ACTIVATED THEIR SWITCH FOR 120.025 AND ALSO GOT NO RESPONSE. THE FREQ QUIT! THEN IT BEGAN COMING AND GOING. WE WERE ABLE TO BROADCAST THROUGH A 3RD JET TO CLB THE DEN JET TO FL330 AND DSND THE CLE JET TO FL240. NTAP WAS INCONCLUSIVE AS TO LOSS OF SEPARATION. REGARDLESS, THE FREQ SHOULD HAVE BEEN REMOVED FROM SVC LONG AGO DUE TO THE CONTINUOUS PROBS ASSOCIATED WITH IT. IT TOOK AN NMAC TO FINALLY GET MGMNT'S ATTN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR SAYS THAT THIS IS STILL A PROB. IT HAS THE MOST IMPACT ON PLTS, BUT OCCASIONALLY THE CTLR CAN ALSO HEAR IT. RPTR THINKS A UCR WAS FILED. FACILITY HAD IT CHKED A WHILE BACK AND BELIEVE THAT PVD APCH CTL IS FEEDING THROUGH. DOESN'T KNOW WHY FACILITY WILL NOT SWAP THIS FREQ FOR ANOTHER TO ELIMINATE THE PROB. THIS IS A HIGH ALT SECTOR.

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.