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Mlb ATCT controller has LJ60 on 2 mi base and notices a PA28 on 4 mi final for same runway. Both aircraft were IFR.
| Attributes | |
| ACN | 448640 |
| Time | |
| Date | 199909 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mlb.airport |
| State Reference | FL |
| Altitude | msl single value : 1200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : mlb.tower |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 60 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : dab.tracon tower : mlb.tower |
| Make Model Name | PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Experience | controller non radar : 15 |
| ASRS Report | 448640 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne critical non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Miss Distance | horizontal : 8000 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Inter Facility Coordination Failure |
Narrative:
LJ60 was on a right base as requested by approach. 2 mi north of final, tower controller observed (on BRITE) an IFR P28A on a 4 mi final to the same runway. LJ60 was instructed to turn directly to the runway and approach was asked P28A's intentions, and was informed P28A wasn't on the tower frequency. Approach advised tower P28A was being switched at that time. LJ60 passed less than 1.5 mi and between 300-400 ft in front of P28A joining final. Both aircraft were IFR. Under the new LOA, tower takes inbound information from the BRITE, and approach will put aircraft on tower frequency before they are within 7 mi. Tower personnel have no reason to look at the BRITE before an aircraft calls, and the discovery of the developing situation was luck. Had approach switched the P28A in a timely manner, the problem would have discovered long before separation was lost.
Original NASA ASRS Text
Title: MLB ATCT CTLR HAS LJ60 ON 2 MI BASE AND NOTICES A PA28 ON 4 MI FINAL FOR SAME RWY. BOTH ACFT WERE IFR.
Narrative: LJ60 WAS ON A R BASE AS REQUESTED BY APCH. 2 MI N OF FINAL, TWR CTLR OBSERVED (ON BRITE) AN IFR P28A ON A 4 MI FINAL TO THE SAME RWY. LJ60 WAS INSTRUCTED TO TURN DIRECTLY TO THE RWY AND APCH WAS ASKED P28A'S INTENTIONS, AND WAS INFORMED P28A WASN'T ON THE TWR FREQ. APCH ADVISED TWR P28A WAS BEING SWITCHED AT THAT TIME. LJ60 PASSED LESS THAN 1.5 MI AND BTWN 300-400 FT IN FRONT OF P28A JOINING FINAL. BOTH ACFT WERE IFR. UNDER THE NEW LOA, TWR TAKES INBOUND INFO FROM THE BRITE, AND APCH WILL PUT ACFT ON TWR FREQ BEFORE THEY ARE WITHIN 7 MI. TWR PERSONNEL HAVE NO REASON TO LOOK AT THE BRITE BEFORE AN ACFT CALLS, AND THE DISCOVERY OF THE DEVELOPING SIT WAS LUCK. HAD APCH SWITCHED THE P28A IN A TIMELY MANNER, THE PROB WOULD HAVE DISCOVERED LONG BEFORE SEPARATION WAS LOST.
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.