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Less than standard separation between air carrier medium large transport and cpr small transport in an overtake at the same altitude.
| Attributes | |
| ACN | 82462 |
| Time | |
| Date | 198802 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : amg |
| State Reference | GA |
| Altitude | msl bound lower : 21900 msl bound upper : 22000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 14 controller supervisory : 8 |
| ASRS Report | 82462 |
| Person 2 | |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 15000 vertical : 100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Medium large transport X, enroute to dab at FL220, was overtaking small transport Y, landing at 23. I issued descent clearance to small transport Y to FL200. I checked the position of medium large transport Z landing jax also overtaking smy Y. At that point I realized medium large transport X was overtaking small transport Y faster than I expected. I then issued a clearance to medium large transport X to turn right to heading 200 to get him away from small transport Y. Neither pilot commented about traffic on the frequency. When separation was reestablished, medium large transport X was clrd on course. Cause: error in judgement on the relative position between medium large transport X and small transport Y.
Original NASA ASRS Text
Title: LESS THAN STANDARD SEPARATION BETWEEN ACR MLG AND CPR SMT IN AN OVERTAKE AT THE SAME ALT.
Narrative: MLG X, ENROUTE TO DAB AT FL220, WAS OVERTAKING SMT Y, LNDG AT 23. I ISSUED DESCENT CLRNC TO SMT Y TO FL200. I CHECKED THE POSITION OF MLG Z LNDG JAX ALSO OVERTAKING SMY Y. AT THAT POINT I REALIZED MLG X WAS OVERTAKING SMT Y FASTER THAN I EXPECTED. I THEN ISSUED A CLRNC TO MLG X TO TURN RIGHT TO HDG 200 TO GET HIM AWAY FROM SMT Y. NEITHER PLT COMMENTED ABOUT TFC ON THE FREQ. WHEN SEPARATION WAS REESTABLISHED, MLG X WAS CLRD ON COURSE. CAUSE: ERROR IN JUDGEMENT ON THE RELATIVE POSITION BETWEEN MLG X AND SMT Y.
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.