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ZOB associate controller witnessed operational error when radar controller dropped data block and descended aircraft to occupied altitude near FL360.
| Attributes | |
| ACN | 635968 |
| Time | |
| Date | 200410 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : slt.vortac |
| State Reference | PA |
| Altitude | msl single value : 36500 |
| Environment | |
| Weather Elements | Turbulence |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : flight data |
| Qualification | controller : radar |
| Experience | controller radar : 15 controller supervisory : 3 |
| ASRS Report | 635968 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6600 vertical : 1100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Radar controller dropped data block on aircraft in level flight. Descended other aircraft when he reported chop and asked for lower.
Original NASA ASRS Text
Title: ZOB ASSOCIATE CTLR WITNESSED OPERROR WHEN RADAR CTLR DROPPED DATA BLOCK AND DSNDED ACFT TO OCCUPIED ALT NEAR FL360.
Narrative: RADAR CTLR DROPPED DATA BLOCK ON ACFT IN LEVEL FLT. DSNDED OTHER ACFT WHEN HE RPTED CHOP AND ASKED FOR LOWER.
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.