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Unicom frequency interfered with by FM station broadcasting on 107 pt 7. CTAF and unicom frequency 123 pt 0.
| Attributes | |
| ACN | 99868 |
| Time | |
| Date | 198811 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : 2ej |
| State Reference | OK |
| Altitude | msl bound lower : 2700 msl bound upper : 2700 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : okc |
| Operator | general aviation : instructional |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 20 flight time total : 520 flight time type : 300 |
| ASRS Report | 99868 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Radio bleed/interference from FM station 107.7 (can hear plainly call letters) that keeps you from hearing unicom. As long as aircraft radios are on the bleed is so severe the volume control cannot remove the FM station. The aircraft frequency does not matter. The radio station needs to be checked for proper operation. Callback conversation with reporter revealed following information. Advised to contact the FCC office and explain the problem. His aircraft does have squelch control and he has had the same problem on 3 different aircraft. Problem has been on-going for some time. Possible the FM station is operating at a higher power output than authorized.
Original NASA ASRS Text
Title: UNICOM FREQ INTERFERED WITH BY FM STATION BROADCASTING ON 107 PT 7. CTAF AND UNICOM FREQ 123 PT 0.
Narrative: RADIO BLEED/INTERFERENCE FROM FM STATION 107.7 (CAN HEAR PLAINLY CALL LETTERS) THAT KEEPS YOU FROM HEARING UNICOM. AS LONG AS ACFT RADIOS ARE ON THE BLEED IS SO SEVERE THE VOLUME CONTROL CANNOT REMOVE THE FM STATION. THE ACFT FREQ DOES NOT MATTER. THE RADIO STATION NEEDS TO BE CHKED FOR PROPER OPERATION. CALLBACK CONVERSATION WITH RPTR REVEALED FOLLOWING INFO. ADVISED TO CONTACT THE FCC OFFICE AND EXPLAIN THE PROB. HIS ACFT DOES HAVE SQUELCH CONTROL AND HE HAS HAD THE SAME PROB ON 3 DIFFERENT ACFT. PROB HAS BEEN ON-GOING FOR SOME TIME. POSSIBLE THE FM STATION IS OPERATING AT A HIGHER PWR OUTPUT THAN AUTHORIZED.
Data retrieved from NASA's ASRS site as of August 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.