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Two aircraft on converging courses came within one mile and 500' of colliding.
| Attributes | |
| ACN | 176306 |
| Time | |
| Date | 199104 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bna |
| State Reference | TN |
| Altitude | msl bound lower : 9500 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bna |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute airway : bna |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 4 |
| ASRS Report | 176306 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
The aircraft did not descend at a normal rate. In over 10 mi it only descended 1000'. I had traffic saturation on south side of airport that took my attention away from rate of descent. I looked up and discovered aircraft were converging, mine was supposed to be going down to 5000' the other was level at 10000'. I turned mine and told to expedite descent and pointed traffic out which we saw.
Original NASA ASRS Text
Title: TWO ACFT ON CONVERGING COURSES CAME WITHIN ONE MILE AND 500' OF COLLIDING.
Narrative: THE ACFT DID NOT DSND AT A NORMAL RATE. IN OVER 10 MI IT ONLY DSNDED 1000'. I HAD TFC SATURATION ON S SIDE OF ARPT THAT TOOK MY ATTN AWAY FROM RATE OF DSNT. I LOOKED UP AND DISCOVERED ACFT WERE CONVERGING, MINE WAS SUPPOSED TO BE GOING DOWN TO 5000' THE OTHER WAS LEVEL AT 10000'. I TURNED MINE AND TOLD TO EXPEDITE DSNT AND POINTED TFC OUT WHICH WE SAW.
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.