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ZID controller caught in incomplete phraseology error during conflict alert review when applying visual separation between a descending carj and climbing C550.
| Attributes | |
| ACN | 586458 |
| Time | |
| Date | 200306 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : iiu.vortac |
| State Reference | KY |
| Altitude | msl single value : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citation II S2/Bravo |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 2 controller time certified in position2 : 9 flight time total : 330 |
| ASRS Report | 586458 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 26400 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft X was descending for lex and had aircraft Y in sight, was asked if he could maintain visual separation and replied affirmative. Aircraft Y was told of the traffic and climbed with aircraft X maintaining the visual. This is only a factor because I forgot to tell aircraft X to maintain visual separation, although it was clear he understood what was going on. This should be a phraseology error and not an operational error. Both aircraft were under positive control and clearly separated and aware of the use of visual separation.
Original NASA ASRS Text
Title: ZID CTLR CAUGHT IN INCOMPLETE PHRASEOLOGY ERROR DURING CONFLICT ALERT REVIEW WHEN APPLYING VISUAL SEPARATION BTWN A DSNDING CARJ AND CLBING C550.
Narrative: ACFT X WAS DSNDING FOR LEX AND HAD ACFT Y IN SIGHT, WAS ASKED IF HE COULD MAINTAIN VISUAL SEPARATION AND REPLIED AFFIRMATIVE. ACFT Y WAS TOLD OF THE TFC AND CLBED WITH ACFT X MAINTAINING THE VISUAL. THIS IS ONLY A FACTOR BECAUSE I FORGOT TO TELL ACFT X TO MAINTAIN VISUAL SEPARATION, ALTHOUGH IT WAS CLR HE UNDERSTOOD WHAT WAS GOING ON. THIS SHOULD BE A PHRASEOLOGY ERROR AND NOT AN OPERROR. BOTH ACFT WERE UNDER POSITIVE CTL AND CLRLY SEPARATED AND AWARE OF THE USE OF VISUAL SEPARATION.
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.