|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0001 To 0600|
|Locale Reference||airport : mke|
|Controlling Facilities||tracon : mke|
|Make Model Name||Any Unknown or Unlisted Aircraft Manufacturer|
|Affiliation||government : faa|
|Function||controller : approach|
|Qualification||controller : radar|
|Experience||controller non radar : 2|
controller radar : 8
|Function||flight crew : single pilot|
|Qualification||pilot : private|
|Anomaly||other anomaly other|
|Independent Detector||other controllera|
|Resolutory Action||none taken : unable|
|Primary Problem||Navigational Facility|
|Air Traffic Incident||other|
|ATC Facility||other physical facility|
At XX10 I terminated radar service with an aircraft and didn't hear an acknowledgement, but noticed the frequency modulating. I went to standby and back to main, which 'reset' the frequency. Between XX10 and XX25 I watched the frequencys for modulation and observed this on 3 additional frequencys without hearing a transmission. I was able to restore each frequency by changing to standby and then back to main. This is an ongoing problem.
Original NASA ASRS Text
Title: APCH CTLR HAS INTERMITTENT RECEIVER FAILURES AND CLAIMS IT IS AN ONGOING PROB.
Narrative: AT XX10 I TERMINATED RADAR SVC WITH AN ACFT AND DIDN'T HEAR AN ACKNOWLEDGEMENT, BUT NOTICED THE FREQ MODULATING. I WENT TO STANDBY AND BACK TO MAIN, WHICH 'RESET' THE FREQ. BTWN XX10 AND XX25 I WATCHED THE FREQS FOR MODULATION AND OBSERVED THIS ON 3 ADDITIONAL FREQS WITHOUT HEARING A XMISSION. I WAS ABLE TO RESTORE EACH FREQ BY CHANGING TO STANDBY AND THEN BACK TO MAIN. THIS IS AN ONGOING PROB.
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.