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ARTCC radar controller dropped data block too soon after handoff and then descended fgt through small transport altitude with less than standard separation.
| Attributes | |
| ACN | 175413 |
| Time | |
| Date | 199103 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mvy |
| State Reference | MA |
| Altitude | msl bound lower : 16000 msl bound upper : 16600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | general aviation : personal |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zbw |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 175413 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 4500 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
An small transport X at 16000' from ack J62 westbound. Small transport X approximately 8 mi from my lateral boundary handed off to next sector. I dropped the data block from my scope. An arriving fgt Y descending to 17000' entered my airspace. I needed to get him below other traffic. Not realizing the small transport X was underneath the fgt Y, I descended the fgt Y to 11000' and lost sep. C/a went off. I tried to stop the fgt Y at 17000', but it was too late.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR DROPPED DATA BLOCK TOO SOON AFTER HANDOFF AND THEN DESCENDED FGT THROUGH SMT ALT WITH LESS THAN STANDARD SEPARATION.
Narrative: AN SMT X AT 16000' FROM ACK J62 WBND. SMT X APPROX 8 MI FROM MY LATERAL BOUNDARY HANDED OFF TO NEXT SECTOR. I DROPPED THE DATA BLOCK FROM MY SCOPE. AN ARRIVING FGT Y DSNDING TO 17000' ENTERED MY AIRSPACE. I NEEDED TO GET HIM BELOW OTHER TFC. NOT REALIZING THE SMT X WAS UNDERNEATH THE FGT Y, I DSNDED THE FGT Y TO 11000' AND LOST SEP. C/A WENT OFF. I TRIED TO STOP THE FGT Y AT 17000', BUT IT WAS TOO LATE.
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.