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ATCT tower controller clears HS25 for takeoff, overtaking a previously departing DC9 on the same SID. TRACON departure controller does not have sufficient time to resolve situation before error occurs.
| Attributes | |
| ACN | 397338 |
| Time | |
| Date | 199802 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : phl |
| State Reference | PA |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | HS 125 Series 1-600 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : initial |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar pilot : instrument |
| Experience | controller radar : 9 flight time total : 1200 |
| ASRS Report | 397338 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 took off runway 27R on the SID. Aircraft #2 took off runway 27R on the SID. Tower didn't provide separation. Aircraft #2 was faster and out climbed aircraft #1. The HS25 caught the DC9 5 mi west of phl on the climb out.
Original NASA ASRS Text
Title: ATCT TWR CTLR CLRS HS25 FOR TKOF, OVERTAKING A PREVIOUSLY DEPARTING DC9 ON THE SAME SID. TRACON DEP CTLR DOES NOT HAVE SUFFICIENT TIME TO RESOLVE SIT BEFORE ERROR OCCURS.
Narrative: ACFT #1 TOOK OFF RWY 27R ON THE SID. ACFT #2 TOOK OFF RWY 27R ON THE SID. TWR DIDN'T PROVIDE SEPARATION. ACFT #2 WAS FASTER AND OUT CLBED ACFT #1. THE HS25 CAUGHT THE DC9 5 MI W OF PHL ON THE CLBOUT.
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.