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Reporter alleges air carrier X had less than standard separation from air carrier Y on final approach to ord. Possible system error.
| Attributes | |
| ACN | 242224 |
| Time | |
| Date | 199305 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach ground : preflight |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | other personnel other |
| Qualification | controller : radar |
| Experience | controller military : 4 controller non radar : 2 controller radar : 13 |
| ASRS Report | 242224 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 999 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
I was working local at pwk ATCT when I noticed, on my BRITE scope, air carrier X and air carrier Y on final at ord runway 22R. The aircraft were less than 1000 ft vertical and 2 mi in trail. The WX at pwk was 3000 broken and 7 mi visibility.
Original NASA ASRS Text
Title: RPTR ALLEGES ACR X HAD LTSS FROM ACR Y ON FINAL APCH TO ORD. POSSIBLE SYS ERROR.
Narrative: I WAS WORKING LCL AT PWK ATCT WHEN I NOTICED, ON MY BRITE SCOPE, ACR X AND ACR Y ON FINAL AT ORD RWY 22R. THE ACFT WERE LESS THAN 1000 FT VERT AND 2 MI IN TRAIL. THE WX AT PWK WAS 3000 BROKEN AND 7 MI VISIBILITY.
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.