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Cpr X non adherence to ATC clearance had near midair collision, less than standard separation from cpr Y. Pilot deviation.
| Attributes | |
| ACN | 250481 |
| Time | |
| Date | 199309 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sdf |
| State Reference | KY |
| Altitude | msl bound lower : 6800 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sdf tower : dal |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Light 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 : departure |
| Qualification | controller : radar |
| Experience | controller radar : 11 |
| ASRS Report | 250481 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : nmac non adherence : clearance non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 0 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cpr X departed sdf. I initially assigned cpr X 290 degree heading, altitude 10000 ft. Reevaluating the situation, I reassigned cpr X 5000 ft and a heading of 240 degrees. Cpr X read back the corrected clearance. Approximately 2 mins later, I observed cpr X in dangerous proximity to cpr Y. I issued an immediate descent to cpr X. Callback conversation with reporter revealed the following information: the reporter stated both aircraft were light transport's and IFR. The aircraft did not see each other. Conflict alert activated at the same time the reporter noticed the altitude deviation. Targets merged with 200 ft vertical separation. Pilot deviation was filed.
Original NASA ASRS Text
Title: CPR X NON ADHERENCE TO ATC CLRNC HAD NMAC, LTSS FROM CPR Y. PLTDEV.
Narrative: CPR X DEPARTED SDF. I INITIALLY ASSIGNED CPR X 290 DEG HDG, ALT 10000 FT. REEVALUATING THE SIT, I REASSIGNED CPR X 5000 FT AND A HDG OF 240 DEGS. CPR X READ BACK THE CORRECTED CLRNC. APPROX 2 MINS LATER, I OBSERVED CPR X IN DANGEROUS PROX TO CPR Y. I ISSUED AN IMMEDIATE DSCNT TO CPR X. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED BOTH ACFT WERE LTT'S AND IFR. THE ACFT DID NOT SEE EACH OTHER. CONFLICT ALERT ACTIVATED AT THE SAME TIME THE RPTR NOTICED THE ALTDEV. TARGETS MERGED WITH 200 FT VERT SEPARATION. PLTDEV WAS FILED.
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.