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Operational error less than standard separation when the faster T34 departure starts to overtake the slower H57 departure.
| Attributes | |
| ACN | 380944 |
| Time | |
| Date | 199709 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : pns |
| State Reference | FL |
| Altitude | msl bound lower : 1700 msl bound upper : 1700 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : pns tower : pns |
| Operator | other |
| Make Model Name | Jet/Long Ranger |
| Operating Under FAR Part | other : other |
| Flight Phase | climbout : initial climbout : intermediate altitude descent : intermediate altitude |
| Route In Use | arrival : on vectors departure other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Mentor (T-34) |
| Operating Under FAR Part | other : other |
| Flight Phase | climbout : initial climbout : intermediate altitude |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Experience | controller military : 6 controller radar : 8 |
| ASRS Report | 380944 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 was assigned 050 degree heading from departure. Aircraft #2 assigned 070 degrees from departure. Aircraft #1 was switched to departure, aircraft #1 tracked approximately 070 degrees. Aircraft #2 was assigned 070 degrees from departure and I pointed out traffic, unable to provide visual separation. Aircraft #2 was overtaking aircraft #1 so I had local controller turn aircraft #2 to a heading of 090 degrees. Coordinated with appropriate position. Ca/ca went off after aircraft had been turned. If aircraft #2 had been switched to departure, aircraft #2 would have ran over aircraft #1. Problem was with the wind condition and 2 different type aircraft performance. Separation was not being ensured when aircraft #1 started tracking a 070 degree heading. At pensacola, tower is very limited on airspace and this particular day military was on runway 25 so all aircraft must turn at departure end of runway.
Original NASA ASRS Text
Title: OPERROR LTSS WHEN THE FASTER T34 DEP STARTS TO OVERTAKE THE SLOWER H57 DEP.
Narrative: ACFT #1 WAS ASSIGNED 050 DEG HDG FROM DEP. ACFT #2 ASSIGNED 070 DEGS FROM DEP. ACFT #1 WAS SWITCHED TO DEP, ACFT #1 TRACKED APPROX 070 DEGS. ACFT #2 WAS ASSIGNED 070 DEGS FROM DEP AND I POINTED OUT TFC, UNABLE TO PROVIDE VISUAL SEPARATION. ACFT #2 WAS OVERTAKING ACFT #1 SO I HAD LCL CTLR TURN ACFT #2 TO A HDG OF 090 DEGS. COORDINATED WITH APPROPRIATE POS. CA/CA WENT OFF AFTER ACFT HAD BEEN TURNED. IF ACFT #2 HAD BEEN SWITCHED TO DEP, ACFT #2 WOULD HAVE RAN OVER ACFT #1. PROB WAS WITH THE WIND CONDITION AND 2 DIFFERENT TYPE ACFT PERFORMANCE. SEPARATION WAS NOT BEING ENSURED WHEN ACFT #1 STARTED TRACKING A 070 DEG HDG. AT PENSACOLA, TWR IS VERY LIMITED ON AIRSPACE AND THIS PARTICULAR DAY MIL WAS ON RWY 25 SO ALL ACFT MUST TURN AT DEP END OF RWY.
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.