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ARTCC controllers had 2 aircraft climbing in same airspace without standard separation. Poor intrafac coordination by data controller.
| Attributes | |
| ACN | 101657 |
| Time | |
| Date | 198901 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : yqg airport : dtw |
| State Reference | ON |
| Altitude | msl bound lower : 14000 msl bound upper : 14600 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute airway : zob |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 101657 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : flight data |
| Qualification | controller : non radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 19200 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Operational Error |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
Afternoon rush small transport Y departed detroit terminal area, checked on frequency with ARTCC and was cleared to FL230. Shortly thereafter received a handoff on an air carrier jet at 15000' inbound into cle. Controller believed small transport Y would top the air carrier jet and if not able to top controller had time to stop at 14000'. Dtw departure controller called for higher on an large transport X climbing out of dtw. Manual controller cleared large transport X to 14000'. Now 14000' not available to stop small transport Y. Controller became extremely busy during this time due to numerous departures and arrs. Situation became extremely complex due to no flowing of cle inbnds (usually flowed by area supervisor). No tracker was offered until it was too late. Controller turned small transport Y to 180 degree heading and continued climb to FL230 (3.2 mi 600' sep). Approximately 12-17 aircraft on frequency. Frequency is a satellite frequency. Arwy facility says frequency is within specifications. When frequency is busy clrncs must be restated several times. A flight check or some other type aircraft need to be in air monitoring this frequency to determine problem on frequency. Also the aircraft inbound into cle during this time frame need to be flowed by flow control, not area supervisor.
Original NASA ASRS Text
Title: ARTCC CTLRS HAD 2 ACFT CLIMBING IN SAME AIRSPACE WITHOUT STANDARD SEPARATION. POOR INTRAFAC COORD BY DATA CTLR.
Narrative: AFTERNOON RUSH SMT Y DEPARTED DETROIT TERMINAL AREA, CHKED ON FREQ WITH ARTCC AND WAS CLRED TO FL230. SHORTLY THEREAFTER RECEIVED A HDOF ON AN ACR JET AT 15000' INBND INTO CLE. CTLR BELIEVED SMT Y WOULD TOP THE ACR JET AND IF NOT ABLE TO TOP CTLR HAD TIME TO STOP AT 14000'. DTW DEP CTLR CALLED FOR HIGHER ON AN LGT X CLBING OUT OF DTW. MANUAL CTLR CLRED LGT X TO 14000'. NOW 14000' NOT AVAILABLE TO STOP SMT Y. CTLR BECAME EXTREMELY BUSY DURING THIS TIME DUE TO NUMEROUS DEPS AND ARRS. SITUATION BECAME EXTREMELY COMPLEX DUE TO NO FLOWING OF CLE INBNDS (USUALLY FLOWED BY AREA SUPVR). NO TRACKER WAS OFFERED UNTIL IT WAS TOO LATE. CTLR TURNED SMT Y TO 180 DEG HDG AND CONTINUED CLB TO FL230 (3.2 MI 600' SEP). APPROX 12-17 ACFT ON FREQ. FREQ IS A SATELLITE FREQ. ARWY FAC SAYS FREQ IS WITHIN SPECS. WHEN FREQ IS BUSY CLRNCS MUST BE RESTATED SEVERAL TIMES. A FLT CHK OR SOME OTHER TYPE ACFT NEED TO BE IN AIR MONITORING THIS FREQ TO DETERMINE PROB ON FREQ. ALSO THE ACFT INBND INTO CLE DURING THIS TIME FRAME NEED TO BE FLOWED BY FLOW CTL, NOT AREA SUPVR.
Data retrieved from NASA's ASRS site as of August 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.