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Manual approach control facility. Small transport X climb through occupied altitude had less than standard separation from small aircraft Y. System error.
| Attributes | |
| ACN | 240079 |
| Time | |
| Date | 199304 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : cou |
| State Reference | MO |
| Altitude | msl bound lower : 4000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cou |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | other personnel other |
| Qualification | controller : non radar |
| ASRS Report | 240079 |
| Person 2 | |
| Affiliation | government : faa |
| Function | instruction : trainee other personnel other |
| Qualification | controller : developmental |
| ASRS Report | 240507 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 3600 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was providing OJT on the non-radar approach control position at columbia, mo, ATCT. The developmental issued a climb to 5000 ft to small transport X. Small aircraft Y was an overflt at 4000 ft. Developmental assumed aircraft were being provided lateral separation, parallel opposite courses. I did not catch error in time and standard IFR separation was lost. Small aircraft Y saw small transport X above him climbing. Small transport X then reported at 5000 ft. Cou ATCT is the only non-radar approach control tower in the FAA central region. We are scheduled to have radar service in the future when an ASR-9 is installed. The over traffic at 4000 ft was proceeding on an RNAV direct route through columbia, mo, ATCT airspace and the controller (developmental and myself) did not get precise enough position reports to ascertain exact position. Supplemental information from acn 240507: radar depicted the aircraft passed 6/10 of a mi and 600 ft apart.
Original NASA ASRS Text
Title: MANUAL APCH CTL FACILITY. SMT X CLB THROUGH OCCUPIED ALT HAD LTSS FROM SMA Y. SYS ERROR.
Narrative: I WAS PROVIDING OJT ON THE NON-RADAR APCH CTL POS AT COLUMBIA, MO, ATCT. THE DEVELOPMENTAL ISSUED A CLB TO 5000 FT TO SMT X. SMA Y WAS AN OVERFLT AT 4000 FT. DEVELOPMENTAL ASSUMED ACFT WERE BEING PROVIDED LATERAL SEPARATION, PARALLEL OPPOSITE COURSES. I DID NOT CATCH ERROR IN TIME AND STANDARD IFR SEPARATION WAS LOST. SMA Y SAW SMT X ABOVE HIM CLBING. SMT X THEN RPTED AT 5000 FT. COU ATCT IS THE ONLY NON-RADAR APCH CTL TWR IN THE FAA CENTRAL REGION. WE ARE SCHEDULED TO HAVE RADAR SVC IN THE FUTURE WHEN AN ASR-9 IS INSTALLED. THE OVER TFC AT 4000 FT WAS PROCEEDING ON AN RNAV DIRECT RTE THROUGH COLUMBIA, MO, ATCT AIRSPACE AND THE CTLR (DEVELOPMENTAL AND MYSELF) DID NOT GET PRECISE ENOUGH POS RPTS TO ASCERTAIN EXACT POS. SUPPLEMENTAL INFO FROM ACN 240507: RADAR DEPICTED THE ACFT PASSED 6/10 OF A MI AND 600 FT APART.
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.