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Small transport X descent through occupied altitude had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 212996 |
| Time | |
| Date | 199206 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : jhw |
| State Reference | NY |
| Altitude | msl bound lower : 20000 msl bound upper : 21000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 4 controller radar : 2 |
| ASRS Report | 212996 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 21000 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
The sector was very complex with military airspace active and VFR pop-up calls. Cpr X was landing in 70-80 mi and requested lower. Controller was distracted by a VFR pop-up and confused the altitude of air carrier Y and cpr X issuing cpr X FL180. Within seconds separation was lost.
Original NASA ASRS Text
Title: SMT X DSCNT THROUGH OCCUPIED ALT HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: THE SECTOR WAS VERY COMPLEX WITH MIL AIRSPACE ACTIVE AND VFR POP-UP CALLS. CPR X WAS LNDG IN 70-80 MI AND REQUESTED LOWER. CTLR WAS DISTRACTED BY A VFR POP-UP AND CONFUSED THE ALT OF ACR Y AND CPR X ISSUING CPR X FL180. WITHIN SECONDS SEPARATION WAS LOST.
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.