Narrative:

Numerous aircraft reported hearing FM100 on the localizer frequency 108.3. The pilots told me that they couldn't make out the localizer identify. This has been a continuous problem. We have been told that maintenance has been working on it. I believe the problem has been ongoing for about a yr. I'm concerned that we are going to see the repair job completed just after an accident. Callback conversation with reporter revealed the following information: reporter stated the problem has been idented to facility management. Several pilots have called the facility and reported the problem. The interference seems to stop inside 15 mi. Airline company person also called and stated several flcs have reported the runway 18L localizer interference to him. Supplemental information from acn 294057: while inbound from hli VORTAC to mem area and descending from 10000 ft on vectors for runway 18L ILS, we attempted to tune and identify the localizer frequency. All 3 receivers picked up a commercial broadcast station very clearly. Big band music was heard but no station identify. The signal seemed stronger when the aircraft was headed north and away from the airport. After turning inbound to the airport we were able to get a good identify for the localizer. We entered holding on the localizer at the 10 mi fix with 10 mi legs because of microburst activity reported on a 2 mi final by mem approach. During the hold at 3000 ft we received the radio station (music) while outbound and the ILS identify while inbound and closer to the station. Instrument comparator light was illuminating during the entire event, except when on final approach.

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Original NASA ASRS Text

Title: ACR X RECEIVED RADIO STATION INTERFERENCE ON RWY 18L LOC FREQ 108 PT 3. ONGOING PROB RPTED BY SEVERAL ACRS. RADIO STATION FREQ FM100.

Narrative: NUMEROUS ACFT RPTED HEARING FM100 ON THE LOC FREQ 108.3. THE PLTS TOLD ME THAT THEY COULDN'T MAKE OUT THE LOC IDENT. THIS HAS BEEN A CONTINUOUS PROB. WE HAVE BEEN TOLD THAT MAINT HAS BEEN WORKING ON IT. I BELIEVE THE PROB HAS BEEN ONGOING FOR ABOUT A YR. I'M CONCERNED THAT WE ARE GOING TO SEE THE REPAIR JOB COMPLETED JUST AFTER AN ACCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THE PROB HAS BEEN IDENTED TO FACILITY MGMNT. SEVERAL PLTS HAVE CALLED THE FACILITY AND RPTED THE PROB. THE INTERFERENCE SEEMS TO STOP INSIDE 15 MI. AIRLINE COMPANY PERSON ALSO CALLED AND STATED SEVERAL FLCS HAVE RPTED THE RWY 18L LOC INTERFERENCE TO HIM. SUPPLEMENTAL INFO FROM ACN 294057: WHILE INBOUND FROM HLI VORTAC TO MEM AREA AND DSNDING FROM 10000 FT ON VECTORS FOR RWY 18L ILS, WE ATTEMPTED TO TUNE AND IDENT THE LOC FREQ. ALL 3 RECEIVERS PICKED UP A COMMERCIAL BROADCAST STATION VERY CLRLY. BIG BAND MUSIC WAS HEARD BUT NO STATION IDENT. THE SIGNAL SEEMED STRONGER WHEN THE ACFT WAS HEADED N AND AWAY FROM THE ARPT. AFTER TURNING INBOUND TO THE ARPT WE WERE ABLE TO GET A GOOD IDENT FOR THE LOC. WE ENTERED HOLDING ON THE LOC AT THE 10 MI FIX WITH 10 MI LEGS BECAUSE OF MICROBURST ACTIVITY RPTED ON A 2 MI FINAL BY MEM APCH. DURING THE HOLD AT 3000 FT WE RECEIVED THE RADIO STATION (MUSIC) WHILE OUTBOUND AND THE ILS IDENT WHILE INBOUND AND CLOSER TO THE STATION. INST COMPARATOR LIGHT WAS ILLUMINATING DURING THE ENTIRE EVENT, EXCEPT WHEN ON FINAL APCH.

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.