ZFW controller expressed concern regarding continued problem with frequency 120.47.

Attributes
ACN	722965
Time
Date	200701
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zfw.artcc
State Reference	TX
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : zzz.tower
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller limited radar : 16 controller non radar : 16 controller radar : 16 controller time certified in position1 : 6
ASRS Report	722965
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Maintenance Human Performance Navigational Facility
Primary Problem	Navigational Facility
Situations
ATC Facility	communication equipment : zfw.artcc

Narrative:

I was working slr hi (sector 71 ZFW) radar with a radar associate. The radio transmitter; frequency 120.47; stuck after making a transmission. I don't think it was hot; just sticking. This happens occasionally and lasts for 2-4 seconds after releasing the transmit button. This is not very long; but it is long enough to cut out most of the aircraft's readback; making it impossible to monitor what the pilot reads back. I have reported this to supervisors on numerous occasions over the last 9-10 weeks and the problem still isn't corrected. This is a safety issue in that a pilot could read back an incorrect altitude assignment; or any other clearance; and the controller not catch it due to the sticking transmitter.

Original NASA ASRS Text

Title: ZFW CTLR EXPRESSED CONCERN REGARDING CONTINUED PROB WITH FREQ 120.47.

Narrative: I WAS WORKING SLR HI (SECTOR 71 ZFW) RADAR WITH A RADAR ASSOCIATE. THE RADIO XMITTER; FREQ 120.47; STUCK AFTER MAKING A XMISSION. I DON'T THINK IT WAS HOT; JUST STICKING. THIS HAPPENS OCCASIONALLY AND LASTS FOR 2-4 SECONDS AFTER RELEASING THE XMIT BUTTON. THIS IS NOT VERY LONG; BUT IT IS LONG ENOUGH TO CUT OUT MOST OF THE ACFT'S READBACK; MAKING IT IMPOSSIBLE TO MONITOR WHAT THE PLT READS BACK. I HAVE RPTED THIS TO SUPVRS ON NUMEROUS OCCASIONS OVER THE LAST 9-10 WKS AND THE PROB STILL ISN'T CORRECTED. THIS IS A SAFETY ISSUE IN THAT A PLT COULD READ BACK AN INCORRECT ALT ASSIGNMENT; OR ANY OTHER CLRNC; AND THE CTLR NOT CATCH IT DUE TO THE STICKING XMITTER.

Data retrieved from NASA's ASRS site as of January 2009 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.