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ZID controller experienced operational error at FL260 when overlooking conflicting traffic during a climbing and descending operations.
| Attributes | |
| ACN | 770967 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : ape.vortac |
| State Reference | OH |
| Altitude | msl single value : 26000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc tower : tol.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 2 |
| ASRS Report | 770967 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 10860 vertical : 600 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier Y climbing off cmh was cleared to FL270. Air carrier X; inbound to cvg; was at FL280. Air carrier X was descended to FL260 to avoid other aircraft; but air carrier Y was overlooked. When conflict alert was activated; air carrier X was stopped at FL270; but I was unable to stop air carrier Y at FL260.
Original NASA ASRS Text
Title: ZID CTLR EXPERIENCED OPERROR AT FL260 WHEN OVERLOOKING CONFLICTING TFC DURING A CLIMBING AND DESCENDING OPS.
Narrative: ACR Y CLBING OFF CMH WAS CLRED TO FL270. ACR X; INBOUND TO CVG; WAS AT FL280. ACR X WAS DSNDED TO FL260 TO AVOID OTHER ACFT; BUT ACR Y WAS OVERLOOKED. WHEN CONFLICT ALERT WAS ACTIVATED; ACR X WAS STOPPED AT FL270; BUT I WAS UNABLE TO STOP ACR Y AT FL260.
Data retrieved from NASA's ASRS site as of May 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.