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An air carrier conflicted with another air carrier aircraft on final approach, resulting in less than standard separation.
| Attributes | |
| ACN | 124766 |
| Time | |
| Date | 198910 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord artcc : zhn |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport |
| Flight Phase | descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| ASRS Report | 124766 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : developmental |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was signed on as a controller on west arrival at ord approach control. There was a deviation signed on also who I was monitoring. Air carrier X checked on the frequency 40 mi southeast of ord and was issued a 290 degree heading for runway 27L. I got busy explaining a traffic situation on the downwind 10 mi east of the airport and did not notice air carrier X approaching air carrier Y on the runway 23L final. The trnee issued corrective action to air carrier X after sep had been lost. Air carrier Y reported air carrier X in sight before sep was lost, but the other controller did not tell him to maintain visibility sep.
Original NASA ASRS Text
Title: AN ACR CONFLICTED WITH ANOTHER ACR ACFT ON FINAL APCH, RESULTING IN LESS THAN STANDARD SEPARATION.
Narrative: I WAS SIGNED ON AS A CTLR ON W ARR AT ORD APCH CTL. THERE WAS A DEV SIGNED ON ALSO WHO I WAS MONITORING. ACR X CHKED ON THE FREQ 40 MI SE OF ORD AND WAS ISSUED A 290 DEG HDG FOR RWY 27L. I GOT BUSY EXPLAINING A TFC SITUATION ON THE DOWNWIND 10 MI E OF THE ARPT AND DID NOT NOTICE ACR X APCHING ACR Y ON THE RWY 23L FINAL. THE TRNEE ISSUED CORRECTIVE ACTION TO ACR X AFTER SEP HAD BEEN LOST. ACR Y RPTED ACR X IN SIGHT BEFORE SEP WAS LOST, BUT THE OTHER CTLR DID NOT TELL HIM TO MAINTAIN VIS SEP.
Data retrieved from NASA's ASRS site as of August 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.