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Sct monitor controller lost separation during parallel approachs.
| Attributes | |
| ACN | 579923 |
| Time | |
| Date | 200304 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : lax.vortac |
| State Reference | CA |
| Altitude | msl single value : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 25l |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 24r |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 4 controller non radar : 3 controller radar : 12 |
| ASRS Report | 579923 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was on an ILS runway 25L approach to hunda at 3500 ft, descending. Air carrier Y, B747, was on vectors to runway 24R. Air carrier Y was turned too early and was on dogleg to join ILS 2 mi west of hunda at 2500 ft. He is supposed to be established on the ILS prior to, east of hunda. I canceled air carrier X's approach clearance. I instructed him to maintain 3500 ft. The pilot had already left 3500 ft and was unable to stop descent until reaching 3000 ft. After air carrier Y was established on his localizer, I reclred air carrier X. Monitored approachs were in progress. Visibility to the east was limited and there were clouds at around 3500 ft. I was working parallel monitor #1 (pm-1).
Original NASA ASRS Text
Title: SCT MONITOR CTLR LOST SEPARATION DURING PARALLEL APCHS.
Narrative: ACR X WAS ON AN ILS RWY 25L APCH TO HUNDA AT 3500 FT, DSNDING. ACR Y, B747, WAS ON VECTORS TO RWY 24R. ACR Y WAS TURNED TOO EARLY AND WAS ON DOGLEG TO JOIN ILS 2 MI W OF HUNDA AT 2500 FT. HE IS SUPPOSED TO BE ESTABLISHED ON THE ILS PRIOR TO, E OF HUNDA. I CANCELED ACR X'S APCH CLRNC. I INSTRUCTED HIM TO MAINTAIN 3500 FT. THE PLT HAD ALREADY LEFT 3500 FT AND WAS UNABLE TO STOP DSCNT UNTIL REACHING 3000 FT. AFTER ACR Y WAS ESTABLISHED ON HIS LOC, I RECLRED ACR X. MONITORED APCHS WERE IN PROGRESS. VISIBILITY TO THE E WAS LIMITED AND THERE WERE CLOUDS AT AROUND 3500 FT. I WAS WORKING PARALLEL MONITOR #1 (PM-1).
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.