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ZMA controller experienced operational error at FL180 when vectoring traffic around another aircraft and misjudged the required spacing.
| Attributes | |
| ACN | 687169 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zma.artcc |
| State Reference | FL |
| Altitude | msl single value : 18000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | general aviation : personal |
| Make Model Name | Airliner 99 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : profile descent |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar controller : non radar |
| Experience | controller limited radar : 20 controller non radar : 21 controller radar : 19 controller time certified in position1 : 19 |
| ASRS Report | 687169 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 16 controller time certified in position1 : 16 |
| ASRS Report | 687168 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera other controllerb |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 17400 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 was issued a clearance direct kubic to short-cut him and keep him north of aircraft #2. Aircraft #1 was given descent clearance to cross kubic at 8000 ft. Aircraft descending from FL190 was expediting through aircraft #2 at 2.9 mi and 100 ft vertical. The sector was very busy. Additional staffing and personnel to assist busy sectors would have prevented this situation. Excellent decision and good reaction by the controller to expedite the descent of aircraft #2; being a jet (the better performer) already on a descent profile and turning the slower king air west into the wind.
Original NASA ASRS Text
Title: ZMA CTLR EXPERIENCED OPERROR AT FL180 WHEN VECTORING TFC AROUND ANOTHER ACFT AND MISJUDGED THE REQUIRED SPACING.
Narrative: ACFT #1 WAS ISSUED A CLRNC DIRECT KUBIC TO SHORT-CUT HIM AND KEEP HIM N OF ACFT #2. ACFT #1 WAS GIVEN DSCNT CLRNC TO CROSS KUBIC AT 8000 FT. ACFT DSNDING FROM FL190 WAS EXPEDITING THROUGH ACFT #2 AT 2.9 MI AND 100 FT VERT. THE SECTOR WAS VERY BUSY. ADDITIONAL STAFFING AND PERSONNEL TO ASSIST BUSY SECTORS WOULD HAVE PREVENTED THIS SITUATION. EXCELLENT DECISION AND GOOD REACTION BY THE CTLR TO EXPEDITE THE DSCNT OF ACFT #2; BEING A JET (THE BETTER PERFORMER) ALREADY ON A DSCNT PROFILE AND TURNING THE SLOWER KING AIR W INTO THE WIND.
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.