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ZOB instructor controller observes potential separation problem, but student is slow to react to instruction and error occurs.
| Attributes | |
| ACN | 599386 |
| Time | |
| Date | 200311 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : buf.airport |
| State Reference | NY |
| Altitude | msl single value : 23000 |
| Environment | |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 135 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, 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 instruction : instructor |
| Qualification | controller : radar |
| Experience | controller limited radar : 3 controller radar : 9 |
| ASRS Report | 599386 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar instruction : trainee |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 22200 vertical : 300 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft X was in front of aircraft Y, both inbound to rochester, ny. Trainee turned aircraft X direct to buffalo to keep him in front of aircraft Y, but did not notice aircraft Y sbound from toronto. Trainer made mention that he turned aircraft X into aircraft Y and said something needed to be done. Aircraft were more than 25 mi apart at this time. Aircraft X was given an expedite clearance to go under aircraft Y then noticed aircraft X descent rate wasn't enough. Trainer tried to stop both aircraft but was too late. Turns were issued to try to keep aircraft apart.
Original NASA ASRS Text
Title: ZOB INSTRUCTOR CTLR OBSERVES POTENTIAL SEPARATION PROB, BUT STUDENT IS SLOW TO REACT TO INSTRUCTION AND ERROR OCCURS.
Narrative: ACFT X WAS IN FRONT OF ACFT Y, BOTH INBOUND TO ROCHESTER, NY. TRAINEE TURNED ACFT X DIRECT TO BUFFALO TO KEEP HIM IN FRONT OF ACFT Y, BUT DID NOT NOTICE ACFT Y SBOUND FROM TORONTO. TRAINER MADE MENTION THAT HE TURNED ACFT X INTO ACFT Y AND SAID SOMETHING NEEDED TO BE DONE. ACFT WERE MORE THAN 25 MI APART AT THIS TIME. ACFT X WAS GIVEN AN EXPEDITE CLRNC TO GO UNDER ACFT Y THEN NOTICED ACFT X DSCNT RATE WASN'T ENOUGH. TRAINER TRIED TO STOP BOTH ACFT BUT WAS TOO LATE. TURNS WERE ISSUED TO TRY TO KEEP ACFT APART.
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.