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Approach controller turned an light transport onto the ILS too soon and had an overtake less than standard separation incident.
| Attributes | |
| ACN | 259957 |
| Time | |
| Date | 199312 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : pit |
| State Reference | PA |
| Altitude | msl bound lower : 5600 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : pit |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| ASRS Report | 259957 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Medium large transport X established on runway 28R ILS and cleared for the approach still at 6000 ft. Light transport Y was turned too early due to ARTS track overlap. The light transport Y was also at 6000 ft and 40 KTS faster. When the tags separated, the light transport Y was still at 6000 ft and faster behind the medium large transport X. They were 400 ft and 1 mi apart when corrective action was taken.
Original NASA ASRS Text
Title: APCH CTLR TURNED AN LTT ONTO THE ILS TOO SOON AND HAD AN OVERTAKE LTSS INCIDENT.
Narrative: MLG X ESTABLISHED ON RWY 28R ILS AND CLRED FOR THE APCH STILL AT 6000 FT. LTT Y WAS TURNED TOO EARLY DUE TO ARTS TRACK OVERLAP. THE LTT Y WAS ALSO AT 6000 FT AND 40 KTS FASTER. WHEN THE TAGS SEPARATED, THE LTT Y WAS STILL AT 6000 FT AND FASTER BEHIND THE MLG X. THEY WERE 400 FT AND 1 MI APART WHEN CORRECTIVE ACTION WAS TAKEN.
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.