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Departure controller at phx believes the tower controller should have considered speed differential between a C501 followed by B757.
| Attributes | |
| ACN | 454785 |
| Time | |
| Date | 199910 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : pxr.vortac |
| State Reference | AZ |
| Altitude | msl single value : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : p50.tracon |
| Operator | general aviation : corporate |
| Make Model Name | Citation I/SP |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : eagul3.eagul |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : p50.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : drk6.drk |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar pilot : instrument |
| Experience | controller non radar : 13 controller radar : 5 controller time certified in position1 : 4 flight time total : 2400 |
| ASRS Report | 454785 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Events | |
| Anomaly | non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Phx ATCT departed C501 lead aircraft on eagul departure. Approximately 6 mi in trail, they released a B757 on drk departure. Both aircraft assigned 7000 ft. Departures overlay each other for 20 mi from airport. B757 had 80 KT overtake on C501. I reassigned altitude of 6000 ft to B757 to ensure separation. No form of position separation was assigned or coordinated by the tower. It appears that some tower controllers do not understand or take into consideration aircraft performance characteristics.
Original NASA ASRS Text
Title: DEP CTLR AT PHX BELIEVES THE TWR CTLR SHOULD HAVE CONSIDERED SPD DIFFERENTIAL BTWN A C501 FOLLOWED BY B757.
Narrative: PHX ATCT DEPARTED C501 LEAD ACFT ON EAGUL DEP. APPROX 6 MI IN TRAIL, THEY RELEASED A B757 ON DRK DEP. BOTH ACFT ASSIGNED 7000 FT. DEPS OVERLAY EACH OTHER FOR 20 MI FROM ARPT. B757 HAD 80 KT OVERTAKE ON C501. I REASSIGNED ALT OF 6000 FT TO B757 TO ENSURE SEPARATION. NO FORM OF POS SEPARATION WAS ASSIGNED OR COORDINATED BY THE TWR. IT APPEARS THAT SOME TWR CTLRS DO NOT UNDERSTAND OR TAKE INTO CONSIDERATION ACFT PERFORMANCE CHARACTERISTICS.
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.