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Air carrier Y climb to occupied altitude had less than standard separation from small aircraft X. System error.
| Attributes | |
| ACN | 219319 |
| Time | |
| Date | 199208 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : oak |
| State Reference | CA |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct enroute airway : zoa |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental controller : radar |
| Experience | controller non radar : 2 controller radar : 1 |
| ASRS Report | 219319 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : flight data |
| Qualification | controller : non radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 28800 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Operational Error |
Narrative:
Small aircraft X departs sfo requesting FL110. Air carrier Y departs shortly after requesting 170. I observed small aircraft X level at 9000 for several mi and d-side, who had coordinated with travis approach and released small aircraft X for climb, then tells me travis approach is working small aircraft X. Thinking small aircraft X is now staying within travis airspace, I consider the problem solved. My concern prior to this was, of course, the air carrier Y 90 KTS faster with both aircraft climbing to 110. We both observed small aircraft X leaving 106, and d-side called travis approach to tell them to descend small aircraft X back to 10000. This was after she had asked me if the air carrier Y was on my frequency, and then called bay approach to see if they were still watching the small aircraft X. They weren't, so the call to travis was made. Air carrier Y checked on my frequency, I immediately climbed the aircraft expeditiously to 13000 and quoted the traffic.
Original NASA ASRS Text
Title: ACR Y CLB TO OCCUPIED ALT HAD LTSS FROM SMA X. SYS ERROR.
Narrative: SMA X DEPARTS SFO REQUESTING FL110. ACR Y DEPARTS SHORTLY AFTER REQUESTING 170. I OBSERVED SMA X LEVEL AT 9000 FOR SEVERAL MI AND D-SIDE, WHO HAD COORDINATED WITH TRAVIS APCH AND RELEASED SMA X FOR CLB, THEN TELLS ME TRAVIS APCH IS WORKING SMA X. THINKING SMA X IS NOW STAYING WITHIN TRAVIS AIRSPACE, I CONSIDER THE PROBLEM SOLVED. MY CONCERN PRIOR TO THIS WAS, OF COURSE, THE ACR Y 90 KTS FASTER WITH BOTH ACFT CLBING TO 110. WE BOTH OBSERVED SMA X LEAVING 106, AND D-SIDE CALLED TRAVIS APCH TO TELL THEM TO DSND SMA X BACK TO 10000. THIS WAS AFTER SHE HAD ASKED ME IF THE ACR Y WAS ON MY FREQ, AND THEN CALLED BAY APCH TO SEE IF THEY WERE STILL WATCHING THE SMA X. THEY WEREN'T, SO THE CALL TO TRAVIS WAS MADE. ACR Y CHKED ON MY FREQ, I IMMEDIATELY CLBED THE ACFT EXPEDITIOUSLY TO 13000 AND QUOTED THE TFC.
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.