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Small aircraft X takeoff on occupied runway had less than standard separation from cpr Y holding in position on opposite end of runway. System error.
| Attributes | |
| ACN | 250064 |
| Time | |
| Date | 199308 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : hpn |
| State Reference | NY |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | climbout : takeoff |
| Flight Plan | VFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | ground : holding |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| ASRS Report | 250064 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Events | |
| Anomaly | conflict : ground less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 4000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
A runway change had taken place from runway 34 to runway 16. A few opposite direction departures were waiting at runway 34. The last one was small aircraft X. In a haste to get the last aircraft out, small aircraft X was put into position and hold on runway 34. Cpr Y was then put into position and hold on runway 16 with traffic on a 7 mi final (the plan being to clear small aircraft X with an immediate right turn to avert traffic, then clear cpr Y and then issue a landing clearance to the aircraft on final). Small aircraft X was issued a takeoff clearance and I immediately realized my mistake. The clearance was cancelled 3 times, but there was no response. Small aircraft X departed and I requested an immediate right turn, to which the pilot complied with. The right turn was made 4000 ft away from cpr Y. An apology was issued to cpr Y with a reply of 'no problem.' contributing factors: fpl for 2 1/2 months, not that much time on position. The fact that a runway change is a very unusual operation not practiced often.
Original NASA ASRS Text
Title: SMA X TKOF ON OCCUPIED RWY HAD LTSS FROM CPR Y HOLDING IN POS ON OPPOSITE END OF RWY. SYS ERROR.
Narrative: A RWY CHANGE HAD TAKEN PLACE FROM RWY 34 TO RWY 16. A FEW OPPOSITE DIRECTION DEPS WERE WAITING AT RWY 34. THE LAST ONE WAS SMA X. IN A HASTE TO GET THE LAST ACFT OUT, SMA X WAS PUT INTO POS AND HOLD ON RWY 34. CPR Y WAS THEN PUT INTO POS AND HOLD ON RWY 16 WITH TFC ON A 7 MI FINAL (THE PLAN BEING TO CLR SMA X WITH AN IMMEDIATE R TURN TO AVERT TFC, THEN CLR CPR Y AND THEN ISSUE A LNDG CLRNC TO THE ACFT ON FINAL). SMA X WAS ISSUED A TKOF CLRNC AND I IMMEDIATELY REALIZED MY MISTAKE. THE CLRNC WAS CANCELLED 3 TIMES, BUT THERE WAS NO RESPONSE. SMA X DEPARTED AND I REQUESTED AN IMMEDIATE R TURN, TO WHICH THE PLT COMPLIED WITH. THE R TURN WAS MADE 4000 FT AWAY FROM CPR Y. AN APOLOGY WAS ISSUED TO CPR Y WITH A REPLY OF 'NO PROB.' CONTRIBUTING FACTORS: FPL FOR 2 1/2 MONTHS, NOT THAT MUCH TIME ON POS. THE FACT THAT A RWY CHANGE IS A VERY UNUSUAL OP NOT PRACTICED OFTEN.
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.