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ZMA controller experienced operational error at 18500 ft when taking control of a sector but not aware of a descent clearance issued by the student controller.
| Attributes | |
| ACN | 768045 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : zbv.vortac |
| State Reference | FO |
| Altitude | msl single value : 18500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 20FJF/20C/20D/20E/20F |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 23 controller radar : 21 |
| ASRS Report | 768045 |
| 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 | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 25343 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was conducting OJT at sector 42 at ZMA. My trainee was approaching his saturation point; with time based arrs into fll over the same fix as fxe and opf traffic. I assumed the frequency to expedite the traffic flow. During the transition; the trainee issued a descent to the FA20 to FL180. The data block did not get updated to show the new assigned altitude. I issued a turn and a climb to the B757 H120 and climb to FL190. When conflict alert activated; the aircraft were on diverging headings; H120 (B757) and H360 (FA20). I assumed that the FA20 had deviated from his clearance. In order to not have the FA20 return to his altitude and risk further conflict; I assigned a further descent to the FA20.
Original NASA ASRS Text
Title: ZMA CTLR EXPERIENCED OPERROR AT 18500 FT WHEN TAKING CTL OF A SECTOR BUT NOT AWARE OF A DESCENT CLRNC ISSUED BY THE STUDENT CTLR.
Narrative: I WAS CONDUCTING OJT AT SECTOR 42 AT ZMA. MY TRAINEE WAS APCHING HIS SATURATION POINT; WITH TIME BASED ARRS INTO FLL OVER THE SAME FIX AS FXE AND OPF TFC. I ASSUMED THE FREQ TO EXPEDITE THE TFC FLOW. DURING THE TRANSITION; THE TRAINEE ISSUED A DSCNT TO THE FA20 TO FL180. THE DATA BLOCK DID NOT GET UPDATED TO SHOW THE NEW ASSIGNED ALT. I ISSUED A TURN AND A CLB TO THE B757 H120 AND CLB TO FL190. WHEN CONFLICT ALERT ACTIVATED; THE ACFT WERE ON DIVERGING HDGS; H120 (B757) AND H360 (FA20). I ASSUMED THAT THE FA20 HAD DEVIATED FROM HIS CLRNC. IN ORDER TO NOT HAVE THE FA20 RETURN TO HIS ALT AND RISK FURTHER CONFLICT; I ASSIGNED A FURTHER DSCNT TO THE FA20.
Data retrieved from NASA's ASRS site as of May 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.