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Air carrier Y had near midair collision, less than standard separation from small aircraft X. Evasive action taken. System error.
| Attributes | |
| ACN | 252064 |
| Time | |
| Date | 199309 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : srq |
| State Reference | FL |
| Altitude | agl bound lower : 600 agl bound upper : 600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : srq |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | climbout : initial climbout : takeoff |
| Route In Use | enroute : on vectors |
| Flight Plan | None |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : takeoff climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller non radar : 2 controller radar : 4 |
| ASRS Report | 252064 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : developmental |
| Events | |
| Anomaly | conflict : nmac non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 100 vertical : 55 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was training a developmental who had close to 30 yrs of ATC experience during a period of moderate to heavy traffic. I had already been required to step in and send 2 aircraft around to prevent a conflict. I had hoped the developmental would be able to recover and regain his self confidence when small aircraft X asked to depart the traffic pattern to the southeast. Small aircraft X was issued a 180 degree heading which conflicted with air carrier Y who had been cleared for takeoff on runway 14. I momentarily lost sight of small aircraft X as he came up over top of the control tower. There was another conflict to be resolved and when I next saw air carrier Y and small aircraft X, they were in close proximity to one another. Small aircraft X made a descending turn to his left while air carrier Y made a descending turn to his right. I had let the developmental go too far and should have interceded earlier.
Original NASA ASRS Text
Title: ACR Y HAD NMAC, LTSS FROM SMA X. EVASIVE ACTION TAKEN. SYS ERROR.
Narrative: I WAS TRAINING A DEVELOPMENTAL WHO HAD CLOSE TO 30 YRS OF ATC EXPERIENCE DURING A PERIOD OF MODERATE TO HVY TFC. I HAD ALREADY BEEN REQUIRED TO STEP IN AND SEND 2 ACFT AROUND TO PREVENT A CONFLICT. I HAD HOPED THE DEVELOPMENTAL WOULD BE ABLE TO RECOVER AND REGAIN HIS SELF CONFIDENCE WHEN SMA X ASKED TO DEPART THE TFC PATTERN TO THE SE. SMA X WAS ISSUED A 180 DEG HDG WHICH CONFLICTED WITH ACR Y WHO HAD BEEN CLRED FOR TKOF ON RWY 14. I MOMENTARILY LOST SIGHT OF SMA X AS HE CAME UP OVER TOP OF THE CTL TWR. THERE WAS ANOTHER CONFLICT TO BE RESOLVED AND WHEN I NEXT SAW ACR Y AND SMA X, THEY WERE IN CLOSE PROX TO ONE ANOTHER. SMA X MADE A DSNDING TURN TO HIS L WHILE ACR Y MADE A DSNDING TURN TO HIS R. I HAD LET THE DEVELOPMENTAL GO TOO FAR AND SHOULD HAVE INTERCEDED EARLIER.
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.