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Potential conflict airborne when air carrier-small transport overshot localizer on turn to parallel ILS approach with air carrier-widebody transport.
| Attributes | |
| ACN | 102349 |
| Time | |
| Date | 198901 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : atl |
| State Reference | GA |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 10000 flight time type : 1000 |
| ASRS Report | 102349 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 1000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
My aircraft, a widebody transport tracking ILS 9R on visual approach. Apparently an small transport was turned on ILS 8L and overshot almost to my position. He turned and went back to his localizer. His closest position was about my 11:45 and 1000' in front of me. To prevent this I think we should use different altitudes for turn on as we do in IFR conditions, or stagger the apches to at least 1 mi separation, i.e., 8L from 9R.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT AIRBORNE WHEN ACR-SMT OVERSHOT LOCALIZER ON TURN TO PARALLEL ILS APCH WITH ACR-WDB.
Narrative: MY ACFT, A WDB TRACKING ILS 9R ON VISUAL APCH. APPARENTLY AN SMT WAS TURNED ON ILS 8L AND OVERSHOT ALMOST TO MY POSITION. HE TURNED AND WENT BACK TO HIS LOC. HIS CLOSEST POSITION WAS ABOUT MY 11:45 AND 1000' IN FRONT OF ME. TO PREVENT THIS I THINK WE SHOULD USE DIFFERENT ALTS FOR TURN ON AS WE DO IN IFR CONDITIONS, OR STAGGER THE APCHES TO AT LEAST 1 MI SEPARATION, I.E., 8L FROM 9R.
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.