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ZDC controller instructs BE20 to descend to FL200 then tells BE20 to disregard and issued traffic. Be 20 descended to FL200 placing it in conflict with traffic prior to returning to assigned altitude.
| Attributes | |
| ACN | 695482 |
| Time | |
| Date | 200604 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : ccv.vortac |
| State Reference | VA |
| Altitude | msl single value : 20000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Make Model Name | Super King Air 200 HDC |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Make Model Name | Small Transport Low Wing 2 Turboprop Eng |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Experience | controller radar : 17 controller time certified in position1 : 14 |
| ASRS Report | 695482 |
| Person 2 | |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance |
| Independent Detector | atc equipment : conflict alert |
| Resolutory Action | controller : issued new clearance flight crew : returned to assigned altitude |
| Miss Distance | horizontal : 12000 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft X was given descent clearance and told to disregard and called traffic. Aircraft X began descent and was told to maintain altitude. Aircraft X descended to aircraft Y's altitude and then climbed to original altitude.
Original NASA ASRS Text
Title: ZDC CTLR INSTRUCTS BE20 TO DSND TO FL200 THEN TELLS BE20 TO DISREGARD AND ISSUED TFC. BE 20 DSNDED TO FL200 PLACING IT IN CONFLICT WITH TFC PRIOR TO RETURNING TO ASSIGNED ALT.
Narrative: ACFT X WAS GIVEN DSCNT CLRNC AND TOLD TO DISREGARD AND CALLED TFC. ACFT X BEGAN DSCNT AND WAS TOLD TO MAINTAIN ALT. ACFT X DSNDED TO ACFT Y'S ALT AND THEN CLBED TO ORIGINAL ALT.
Data retrieved from NASA's ASRS site as of January 2009 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.