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ZOB controller experienced operational error at 12000 ft when climbing 2 minimally spaced departures with following aircraft overtaking preceding aircraft.
| Attributes | |
| ACN | 671921 |
| Time | |
| Date | 200509 |
| Place | |
| Locale Reference | airport : pit.airport |
| State Reference | PA |
| Altitude | msl single value : 12000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series 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 : 15 controller time certified in position1 : 5 |
| ASRS Report | 671921 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Both departures level at 11000 ft; 6 mi; same route; same type aircraft; same company. Radar equipment not giving a good readout on speeds yet. LOA between ZOB and pit says 5 mi constant or increasing between like types. I climbed both; back aircraft overtook front aircraft. Approach control should have assigned speeds to ensure separation. Front aircraft was a DH8-a; back aircraft a DH8-B = 60 KT overtake.
Original NASA ASRS Text
Title: ZOB CTLR EXPERIENCED OPERROR AT 12000 FT WHEN CLBING 2 MINIMALLY SPACED DEPS WITH FOLLOWING ACFT OVERTAKING PRECEDING ACFT.
Narrative: BOTH DEPS LEVEL AT 11000 FT; 6 MI; SAME RTE; SAME TYPE ACFT; SAME COMPANY. RADAR EQUIP NOT GIVING A GOOD READOUT ON SPDS YET. LOA BTWN ZOB AND PIT SAYS 5 MI CONSTANT OR INCREASING BTWN LIKE TYPES. I CLBED BOTH; BACK ACFT OVERTOOK FRONT ACFT. APCH CTL SHOULD HAVE ASSIGNED SPDS TO ENSURE SEPARATION. FRONT ACFT WAS A DH8-A; BACK ACFT A DH8-B = 60 KT OVERTAKE.
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.