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Radar separation was lost when an small transport could not maintain visual separation with traffic he was following.
| Attributes | |
| ACN | 125940 |
| Time | |
| Date | 198910 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : cae |
| State Reference | SC |
| Altitude | msl bound lower : 500 msl bound upper : 1300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cae |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air taxi |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | descent other landing other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 8 controller non radar : 2 controller radar : 1 |
| ASRS Report | 125940 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 800 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Light transport X was on the ILS approach to runway 11 at columbus metropolitan. Small transport Y was inbound from the east at 3100' and vectored for left downwind for ILS runway 11 and to report airport in sight for a visual approach. Small transport Y was descended to 2100'. The initial altitude for light transport X on the ILS was 2100' also. Small transport Y then descended to 1700' and reported field in sight. 2 mi northeast of airport, small transport Y was asked if light transport X on 1 1/2 mi final was in sight, he responded, 'looking'. Lateral and vertical separation was lost prior to small transport Y advising he had light transport X in sight.
Original NASA ASRS Text
Title: RADAR SEPARATION WAS LOST WHEN AN SMT COULD NOT MAINTAIN VISUAL SEPARATION WITH TRAFFIC HE WAS FOLLOWING.
Narrative: LTT X WAS ON THE ILS APCH TO RWY 11 AT COLUMBUS METRO. SMT Y WAS INBND FROM THE EAST AT 3100' AND VECTORED FOR LEFT DOWNWIND FOR ILS RWY 11 AND TO REPORT ARPT IN SIGHT FOR A VISUAL APCH. SMT Y WAS DESCENDED TO 2100'. THE INITIAL ALT FOR LTT X ON THE ILS WAS 2100' ALSO. SMT Y THEN DESCENDED TO 1700' AND REPORTED FIELD IN SIGHT. 2 MI NE OF ARPT, SMT Y WAS ASKED IF LTT X ON 1 1/2 MI FINAL WAS IN SIGHT, HE RESPONDED, 'LOOKING'. LATERAL AND VERTICAL SEPARATION WAS LOST PRIOR TO SMT Y ADVISING HE HAD LTT X IN SIGHT.
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.