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Controller at ZID descended air carrier to altitude occupied by business jet resulting in operational error.
| Attributes | |
| ACN | 404434 |
| Time | |
| Date | 199805 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : abb |
| State Reference | IN |
| Altitude | msl bound lower : 25000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | other personnel other |
| Qualification | controller : developmental |
| Experience | controller military : 4 controller radar : 12 |
| ASRS Report | 404434 |
| Person 2 | |
| Affiliation | company : air carrier |
| 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 | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 900 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Was working with tracker. Tracker went off line with coordination and I issued descent to FL240. Data block was not updated -- showed FL260. Air carrier descended below FL260 into traffic at FL250. Simple case of data block not updated -- operating on incorrect information.
Original NASA ASRS Text
Title: CTLR AT ZID DSNDED ACR TO ALT OCCUPIED BY BUSINESS JET RESULTING IN OPERROR.
Narrative: WAS WORKING WITH TRACKER. TRACKER WENT OFF LINE WITH COORD AND I ISSUED DSCNT TO FL240. DATA BLOCK WAS NOT UPDATED -- SHOWED FL260. ACR DSNDED BELOW FL260 INTO TFC AT FL250. SIMPLE CASE OF DATA BLOCK NOT UPDATED -- OPERATING ON INCORRECT INFO.
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.