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ZOB controller issued wrong flight level to aircraft causing a conflict with traffic at the altitude opposite direction.
| Attributes | |
| ACN | 439707 |
| Time | |
| Date | 199906 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : crl.vortac |
| State Reference | MI |
| Altitude | msl bound lower : 28000 msl bound upper : 28600 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 10 |
| ASRS Report | 439707 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : returned to original clearance none taken : detected after the fact |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft were in opposite direction flight. Aircraft X nwbound level at FL280. Aircraft Y was sebound descending to FL280. Aircraft Y received an RA leaving FL286 and climbed back to FL290. Controller saw traffic intending to clear aircraft Y to FL290. Entered in data block FL290 but issued FL280.
Original NASA ASRS Text
Title: ZOB CTLR ISSUED WRONG FLT LEVEL TO ACFT CAUSING A CONFLICT WITH TFC AT THE ALT OPPOSITE DIRECTION.
Narrative: ACFT WERE IN OPPOSITE DIRECTION FLT. ACFT X NWBOUND LEVEL AT FL280. ACFT Y WAS SEBOUND DSNDING TO FL280. ACFT Y RECEIVED AN RA LEAVING FL286 AND CLBED BACK TO FL290. CTLR SAW TFC INTENDING TO CLR ACFT Y TO FL290. ENTERED IN DATA BLOCK FL290 BUT ISSUED FL280.
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.