Narrative:

Triple simultaneous ILS approachs were in progress. Tower local for center runway had an rdvs failure and transitioned to emergency jacks. Final monitor thus lost their monitor/override capability which is required for simultaneous ILS approachs. Aircraft were already established on all 3 finals and on tower frequencys. I am not sure if separation standards were met between all aircraft -- several aircraft were broken out and brought back around and we then transitioned to 2-RWY operation which could be monitored.

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Original NASA ASRS Text

Title: WHILE CONDUCTING TRIPLE APCHS INTO DFW ARPT, THE RWY 35C FINAL MONITOR FREQ FAILED.

Narrative: TRIPLE SIMULTANEOUS ILS APCHS WERE IN PROGRESS. TWR LCL FOR CTR RWY HAD AN RDVS FAILURE AND TRANSITIONED TO EMER JACKS. FINAL MONITOR THUS LOST THEIR MONITOR/OVERRIDE CAPABILITY WHICH IS REQUIRED FOR SIMULTANEOUS ILS APCHS. ACFT WERE ALREADY ESTABLISHED ON ALL 3 FINALS AND ON TWR FREQS. I AM NOT SURE IF SEPARATION STANDARDS WERE MET BTWN ALL ACFT -- SEVERAL ACFT WERE BROKEN OUT AND BROUGHT BACK AROUND AND WE THEN TRANSITIONED TO 2-RWY OP WHICH COULD BE MONITORED.

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.