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ZAU controller experienced operational error at 17000 ft when climbing aircraft through occupied altitude.
| Attributes | |
| ACN | 686688 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : vhp.vortac |
| State Reference | IN |
| Altitude | msl single value : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citationjet C525/C526 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Embraer Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 20.5 controller time certified in position1 : 23 |
| ASRS Report | 686688 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 14400 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I climbed a C525 to FL180 from 12000 ft swbound from okk north of ind. An E170 at 17000 ft was northbound from ind to ord. I called ZID for coordination on 2 aircraft. When I came off the line; I noticed the C525 was in conflict with the E170. The C525 mode C read 152; so I stopped the C525 at 16000 ft. The C525 respond that they were at 17000 ft climbing. I continued the climb of C525 to FL200 since the aircraft were past each other. The mode C on the C525 lagged far behind and conflict alert did not activate until after they passed. Coordination took my attention away from situation. I missed traffic for C525 initially because I was focused on potential traffic down the road.
Original NASA ASRS Text
Title: ZAU CTLR EXPERIENCED OPERROR AT 17000 FT WHEN CLBING ACFT THROUGH OCCUPIED ALT.
Narrative: I CLBED A C525 TO FL180 FROM 12000 FT SWBOUND FROM OKK N OF IND. AN E170 AT 17000 FT WAS NBOUND FROM IND TO ORD. I CALLED ZID FOR COORD ON 2 ACFT. WHEN I CAME OFF THE LINE; I NOTICED THE C525 WAS IN CONFLICT WITH THE E170. THE C525 MODE C READ 152; SO I STOPPED THE C525 AT 16000 FT. THE C525 RESPOND THAT THEY WERE AT 17000 FT CLBING. I CONTINUED THE CLB OF C525 TO FL200 SINCE THE ACFT WERE PAST EACH OTHER. THE MODE C ON THE C525 LAGGED FAR BEHIND AND CONFLICT ALERT DID NOT ACTIVATE UNTIL AFTER THEY PASSED. COORD TOOK MY ATTN AWAY FROM SITUATION. I MISSED TFC FOR C525 INITIALLY BECAUSE I WAS FOCUSED ON POTENTIAL TFC DOWN THE ROAD.
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.