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Controller trainee descended air carrier-large transport through the altitude of another air carrier-large transport resulting in less than standard separation.
| Attributes | |
| ACN | 90295 |
| Time | |
| Date | 198806 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mxe |
| State Reference | PA |
| Altitude | msl bound lower : 16000 msl bound upper : 16300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 3 controller radar : 3 |
| ASRS Report | 90295 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance none taken : insufficient time other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was administering OJT to a radar trnee and the trnee descended an aircraft at 17000' (large transport X) through another aircraft at 16000' (large transport Y) when I took the frequency and vectored large transport Y, but we had 3 mi horizontal and 300' vertical sep.
Original NASA ASRS Text
Title: CTLR TRAINEE DESCENDED ACR-LGT THROUGH THE ALT OF ANOTHER ACR-LGT RESULTING IN LESS THAN STANDARD SEPARATION.
Narrative: I WAS ADMINISTERING OJT TO A RADAR TRNEE AND THE TRNEE DSNDED AN ACFT AT 17000' (LGT X) THROUGH ANOTHER ACFT AT 16000' (LGT Y) WHEN I TOOK THE FREQ AND VECTORED LGT Y, BUT WE HAD 3 MI HORIZ AND 300' VERT SEP.
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.