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Aircraft conflicted with another aircraft at the same altitude due to slow descent rate and radio problems.
| Attributes | |
| ACN | 116273 |
| Time | |
| Date | 198907 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zid |
| State Reference | IN |
| Altitude | msl bound lower : 29500 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental |
| Experience | controller non radar : 2 |
| ASRS Report | 116273 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 1500 |
| Supplementary | |
| Air Traffic Incident | Operational Error |
Narrative:
Northbound flight at FL310 and swbnd flight also at FL310 landing at bna. Swbnd aircraft was descended to FL290 and 1 min later was told to be level in 1 min. Aircraft complained about not having an early warning. My instrument intervened to have the aircraft expedite descent, but the frequency failed. In the ensuing 30 seconds, we tried multiple radio jacks but none worked. We got frequencys back, but too late.
Original NASA ASRS Text
Title: ACFT CONFLICTED WITH ANOTHER ACFT AT THE SAME ALT DUE TO SLOW DESCENT RATE AND RADIO PROBLEMS.
Narrative: NBOUND FLT AT FL310 AND SWBND FLT ALSO AT FL310 LNDG AT BNA. SWBND ACFT WAS DSNDED TO FL290 AND 1 MIN LATER WAS TOLD TO BE LEVEL IN 1 MIN. ACFT COMPLAINED ABOUT NOT HAVING AN EARLY WARNING. MY INSTR INTERVENED TO HAVE THE ACFT EXPEDITE DSCNT, BUT THE FREQ FAILED. IN THE ENSUING 30 SECS, WE TRIED MULTIPLE RADIO JACKS BUT NONE WORKED. WE GOT FREQS BACK, BUT TOO LATE.
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.