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ZID controller experienced operational error at FL253 when he or she issued altitude to wrong aircraft and separation was lost.
| Attributes | |
| ACN | 721567 |
| Time | |
| Date | 200612 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : rod.vortac |
| State Reference | OH |
| Altitude | msl single value : 25300 |
| Environment | |
| Weather Elements | Turbulence |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 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 : 20 flight time total : 160 |
| ASRS Report | 721567 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Experience | controller radar : 17 |
| ASRS Report | 721393 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera other controllerb other flight crewb |
| Resolutory Action | controller : issued alert controller : issued new clearance none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 13800 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working dayton radar position (R88); I was evaluating traffic and spacing requirements. Air carrier Y was cleared up to FL300. Air carrier X was level FL250 waiting on higher. My intent was to amend air carrier Y to FL290. My clearance 'air carrier X amend altitude climb and maintain FL290.' air carrier X read back clearance. Another aircraft; air carrier Z; called. My d-side immediately told me of my mistake. Approximately 10 seconds had passed when I went back to air carrier X to maintain FL250. Air carrier X; DC10; had gotten to FL253 and then went back down to FL250; but not before getting within 700 ft of another aircraft; air carrier Z; at FL260 (CRJ2). Supplemental information from acn 721393: clearance was meant for air carrier Y. I immediately told the radar man that the wrong aircraft got clearance. He tried to stop him but it was too late. I believe similar call signs played a role.
Original NASA ASRS Text
Title: ZID CTLR EXPERIENCED OPERROR AT FL253 WHEN HE OR SHE ISSUED ALT TO WRONG ACFT AND SEPARATION WAS LOST.
Narrative: I WAS WORKING DAYTON RADAR POS (R88); I WAS EVALUATING TFC AND SPACING REQUIREMENTS. ACR Y WAS CLRED UP TO FL300. ACR X WAS LEVEL FL250 WAITING ON HIGHER. MY INTENT WAS TO AMEND ACR Y TO FL290. MY CLRNC 'ACR X AMEND ALT CLB AND MAINTAIN FL290.' ACR X READ BACK CLRNC. ANOTHER ACFT; ACR Z; CALLED. MY D-SIDE IMMEDIATELY TOLD ME OF MY MISTAKE. APPROX 10 SECONDS HAD PASSED WHEN I WENT BACK TO ACR X TO MAINTAIN FL250. ACR X; DC10; HAD GOTTEN TO FL253 AND THEN WENT BACK DOWN TO FL250; BUT NOT BEFORE GETTING WITHIN 700 FT OF ANOTHER ACFT; ACR Z; AT FL260 (CRJ2). SUPPLEMENTAL INFO FROM ACN 721393: CLRNC WAS MEANT FOR ACR Y. I IMMEDIATELY TOLD THE RADAR MAN THAT THE WRONG ACFT GOT CLRNC. HE TRIED TO STOP HIM BUT IT WAS TOO LATE. I BELIEVE SIMILAR CALL SIGNS PLAYED A ROLE.
Data retrieved from NASA's ASRS site as of January 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.