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Hsv TRACON controller distracted by supervisor question experienced conflict when failing to hear student descend aircraft through occupied altitude.
| Attributes | |
| ACN | 730209 |
| Time | |
| Date | 200703 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zzz.artcc |
| State Reference | US |
| Altitude | msl bound lower : 30000 msl bound upper : 32000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B747-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 8000 flight time type : 1600 |
| ASRS Report | 730248 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : clearance non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
I was training on west radar. The MD88 was inbound to the airport; the cessna was orbiting at 4700 ft on ns track doing grid work. My trainee stopped the MD88 at 7000 ft. The MD88 was issued a vector for the airport that put the MD88 in the flight path of the cessna but the 2 aircraft were still separated by altitude. The supervisor then distraction me regarding a shift change for the next day. During this time my trainee descended the MD88 to 5000 ft. I did not hear this transmission due to the interruption. As I refocused on the scope; I realized that the MD88 was descending. However I did not have enough time to remedy the situation fully. The MD88 got an RA from his TCAS.
Original NASA ASRS Text
Title: HSV TRACON CTLR DISTRACTED BY SUPVR QUESTION EXPERIENCED CONFLICT WHEN FAILING TO HEAR STUDENT DESCEND ACFT THROUGH OCCUPIED ALT.
Narrative: I WAS TRAINING ON W RADAR. THE MD88 WAS INBOUND TO THE ARPT; THE CESSNA WAS ORBITING AT 4700 FT ON NS TRACK DOING GRID WORK. MY TRAINEE STOPPED THE MD88 AT 7000 FT. THE MD88 WAS ISSUED A VECTOR FOR THE ARPT THAT PUT THE MD88 IN THE FLT PATH OF THE CESSNA BUT THE 2 ACFT WERE STILL SEPARATED BY ALT. THE SUPVR THEN DISTR ME REGARDING A SHIFT CHANGE FOR THE NEXT DAY. DURING THIS TIME MY TRAINEE DSNDED THE MD88 TO 5000 FT. I DID NOT HEAR THIS XMISSION DUE TO THE INTERRUPTION. AS I REFOCUSED ON THE SCOPE; I REALIZED THAT THE MD88 WAS DSNDING. HOWEVER I DID NOT HAVE ENOUGH TIME TO REMEDY THE SIT FULLY. THE MD88 GOT AN RA FROM HIS TCAS.
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.