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Widebody transport aircraft coupled autoplt on ILS approach had to level aircraft for another aircraft passing under. Approach controller was controling both aircraft. TCASII on traffic. When intruder was out of the way, reporter continued approach from above the GS.
| Attributes | |
| ACN | 346480 |
| Time | |
| Date | 199609 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | descent : approach |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 210 flight time type : 4000 |
| ASRS Report | 346480 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 1200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
While on approach to runway 8L atl (on localizer (autoplt capture with autoplt engaged) initial assigned 5000 ft MSL but had been cleared for approach) atl approach. 'Air carrier X maintain 5000 ft we have an aircraft go through on south side (ie runway 9R).' he (aircraft Y) went completely north of runway 8L extended centerline. As I looked out my side window I had no trouble seeing aircraft at 10 O'clock about 1200 ft down. Said aircraft finally proceeded generally back towards south runway. When safe separation was observed on our (TCASII) and visually we started down from above the GS.
Original NASA ASRS Text
Title: WDB ACFT COUPLED AUTOPLT ON ILS APCH HAD TO LEVEL ACFT FOR ANOTHER ACFT PASSING UNDER. APCH CTLR WAS CTLING BOTH ACFT. TCASII ON TFC. WHEN INTRUDER WAS OUT OF THE WAY, RPTR CONTINUED APCH FROM ABOVE THE GS.
Narrative: WHILE ON APCH TO RWY 8L ATL (ON LOC (AUTOPLT CAPTURE WITH AUTOPLT ENGAGED) INITIAL ASSIGNED 5000 FT MSL BUT HAD BEEN CLRED FOR APCH) ATL APCH. 'ACR X MAINTAIN 5000 FT WE HAVE AN ACFT GO THROUGH ON S SIDE (IE RWY 9R).' HE (ACFT Y) WENT COMPLETELY N OF RWY 8L EXTENDED CTRLINE. AS I LOOKED OUT MY SIDE WINDOW I HAD NO TROUBLE SEEING ACFT AT 10 O'CLOCK ABOUT 1200 FT DOWN. SAID ACFT FINALLY PROCEEDED GENERALLY BACK TOWARDS S RWY. WHEN SAFE SEPARATION WAS OBSERVED ON OUR (TCASII) AND VISUALLY WE STARTED DOWN FROM ABOVE THE GS.
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.