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Approach lost their 3 mi before they applied visual separation between aircraft X and aircraft Y. This resulted in a loss of standard separation.
| Attributes | |
| ACN | 446737 |
| Time | |
| Date | 199908 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : azo.airport |
| State Reference | MI |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : azo.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Do 328 TP (Turboprop) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial climbout : takeoff |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : azo.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Experience | controller military : 4 controller radar : 8 |
| ASRS Report | 446737 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 9000 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
Departure off runway 17, arrival runway 35, D328 aircraft X runway heading. BE1900 aircraft Y on vector visual approach. I was working tower. Initial heading 140 degrees and 3000 ft. Radar called and said, 'put aircraft X on runway heading and climb.' canceled heading and altitude on departure to runway heading and 10000 ft, radar contact, visual separation, but could be 3 or less mi. Advised supervisor first thing in the morning of possible error, no supervisor on duty at time.
Original NASA ASRS Text
Title: APCH LOST THEIR 3 MI BEFORE THEY APPLIED VISUAL SEPARATION BTWN ACFT X AND ACFT Y. THIS RESULTED IN A LOSS OF STANDARD SEPARATION.
Narrative: DEP OFF RWY 17, ARR RWY 35, D328 ACFT X RWY HDG. BE1900 ACFT Y ON VECTOR VISUAL APCH. I WAS WORKING TWR. INITIAL HDG 140 DEGS AND 3000 FT. RADAR CALLED AND SAID, 'PUT ACFT X ON RWY HDG AND CLB.' CANCELED HDG AND ALT ON DEP TO RWY HDG AND 10000 FT, RADAR CONTACT, VISUAL SEPARATION, BUT COULD BE 3 OR LESS MI. ADVISED SUPVR FIRST THING IN THE MORNING OF POSSIBLE ERROR, NO SUPVR ON DUTY AT TIME.
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.