An approach controller reports frequency 121.0 is unusable at times south east of sgf. Aircraft were...

Attributes
ACN	764186
Time
Date	200712
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sgf.tracon
State Reference	MO
Altitude	msl bound lower : 6000 msl bound upper : 16000
Environment
Light	Daylight
Person 1
Affiliation	government : faa
Function	controller : approach
Experience	controller limited radar : 3 controller radar : 11 controller time certified in position1 : 18
ASRS Report	764186
Events
Independent Detector	other controllera
Resolutory Action	none taken : unable
Supplementary
Problem Areas	Navigational Facility
Primary Problem	Navigational Facility
Situations
ATC Facility	communication equipment : sgf.tracon

Narrative:

Springfield approach control sgf frequency 121.0 is unusable southeast of the sgf airport reported by numerous aircraft. Occurrence listed above is most recent; aircraft was 35 mi from sgf at 6000 ft MSL 4500 ft AGL and could not reach us. Aircraft was issued our other frequency by ZME and established communication on 124.95. Problem also occurs at 16000 ft; 40 mi southeast of the sgf airport with CRJ1 and B727 air carrier's; they come in very weak and eventually can communicate with us. Main and standby transmitters and receivers are tried; no difference. I will begin logging each event for your tracking. I have worked this position here for 10 yrs problem seems to have started 6 months ago and slowly getting worse. Callback conversation with reporter revealed the following information: the reporter expressed frustration that this has been going on for some time. He has not recently reported the frequency anomaly to his supervisor or airways facilities (af). But it seems not much was done when he previously reported the problem because the response he got was that it appears intermittent and there is nothing that can be done.

Original NASA ASRS Text

Title: AN APCH CTLR RPTS FREQ 121.0 IS UNUSABLE AT TIMES SOUTH EAST OF SGF. ACFT WERE RPTED FROM 35-40 MILES AND ALTS OF 6000 FT TO 16000 FT.

Narrative: SPRINGFIELD APCH CTL SGF FREQ 121.0 IS UNUSABLE SE OF THE SGF ARPT RPTED BY NUMEROUS ACFT. OCCURRENCE LISTED ABOVE IS MOST RECENT; ACFT WAS 35 MI FROM SGF AT 6000 FT MSL 4500 FT AGL AND COULD NOT REACH US. ACFT WAS ISSUED OUR OTHER FREQ BY ZME AND ESTABLISHED COM ON 124.95. PROB ALSO OCCURS AT 16000 FT; 40 MI SE OF THE SGF ARPT WITH CRJ1 AND B727 ACR'S; THEY COME IN VERY WEAK AND EVENTUALLY CAN COMMUNICATE WITH US. MAIN AND STANDBY XMITTERS AND RECEIVERS ARE TRIED; NO DIFFERENCE. I WILL BEGIN LOGGING EACH EVENT FOR YOUR TRACKING. I HAVE WORKED THIS POS HERE FOR 10 YRS PROB SEEMS TO HAVE STARTED 6 MONTHS AGO AND SLOWLY GETTING WORSE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE REPORTER EXPRESSED FRUSTRATION THAT THIS HAS BEEN GOING ON FOR SOME TIME. HE HAS NOT RECENTLY REPORTED THE FREQUENCY ANOMALY TO HIS SUPERVISOR OR AIRWAYS FACILITIES (AF). BUT IT SEEMS NOT MUCH WAS DONE WHEN HE PREVIOUSLY REPORTED THE PROBLEM BECAUSE THE RESPONSE HE GOT WAS THAT IT APPEARS INTERMITTENT AND THERE IS NOTHING THAT CAN BE DONE.

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.

An approach controller reports frequency 121.0 is unusable at times south east of sgf. Aircraft were reported from 35-40 miles and altitudes of 6000 ft to 16000 ft.