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Air carrier misinterprets approach clearance and intercepts the wrong ILS during a multiple runway operation. Alert controller intervenes and assigns runway.
| Attributes | |
| ACN | 131587 |
| Time | |
| Date | 198912 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | msl bound lower : 5000 msl bound upper : 5500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl artcc : zme |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent : approach |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 180 flight time total : 2300 flight time type : 800 |
| ASRS Report | 131587 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were on top at about 5500', descending to 5000' when cleared for the ILS approach. Both the captain and I thought the controller had said, 'cleared for the approach, 9R.' it was extremely busy with many, may radio calls for heading and altitude changes. We were still on top descending when the controller asked if we were overshooting. I said no, 'we're captured on the localizer.' I noticed an aircraft in front of us and closer than normal for this WX condition approach. I was about to ask the controller about our spacing when he expertly vectored us over to 8L for a normal automatic approach and landing. There was never any danger of collision. As stated before, the captain and I both thought we were supposed to be on ILS 9R. The contributing factors was just how busy it was with all the vectors, headings and handoffs. The controller did an outstanding job! No one had to go around. It just seemed to be a missed communication problem.
Original NASA ASRS Text
Title: ACR MISINTERPRETS APCH CLRNC AND INTERCEPTS THE WRONG ILS DURING A MULTIPLE RWY OPERATION. ALERT CTLR INTERVENES AND ASSIGNS RWY.
Narrative: WE WERE ON TOP AT ABOUT 5500', DSNDING TO 5000' WHEN CLRED FOR THE ILS APCH. BOTH THE CAPT AND I THOUGHT THE CTLR HAD SAID, 'CLRED FOR THE APCH, 9R.' IT WAS EXTREMELY BUSY WITH MANY, MAY RADIO CALLS FOR HDG AND ALT CHANGES. WE WERE STILL ON TOP DSNDING WHEN THE CTLR ASKED IF WE WERE OVERSHOOTING. I SAID NO, 'WE'RE CAPTURED ON THE LOC.' I NOTICED AN ACFT IN FRONT OF US AND CLOSER THAN NORMAL FOR THIS WX CONDITION APCH. I WAS ABOUT TO ASK THE CTLR ABOUT OUR SPACING WHEN HE EXPERTLY VECTORED US OVER TO 8L FOR A NORMAL AUTO APCH AND LNDG. THERE WAS NEVER ANY DANGER OF COLLISION. AS STATED BEFORE, THE CAPT AND I BOTH THOUGHT WE WERE SUPPOSED TO BE ON ILS 9R. THE CONTRIBUTING FACTORS WAS JUST HOW BUSY IT WAS WITH ALL THE VECTORS, HDGS AND HDOFS. THE CTLR DID AN OUTSTANDING JOB! NO ONE HAD TO GO AROUND. IT JUST SEEMED TO BE A MISSED COM PROB.
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.