Narrative:

Late afternoon, WX cavu, level at 5000 ft. Just prior to turning downwind with orf approach, noted TCASII indication of aircraft 500 ft below and climbing heading straight for us. Unable to visually locate other aircraft. Got TCASII RA command to 'climb, climb!' as other aircraft climbed to within 200 ft almost right under us, first officer was flying, disconnected autoplt, and climbed to 6000 ft before TCASII warning abated. Orf approach control seemed a little agitated. We couldn't hear much of what they said because of the obnoxiously loud and repetitive autoplt disconnect warning, which is a whole safety issue itself. I'd really like to see it changed to a more conventional aural warning when it's intentionally disconnected. I've debriefed and noted this problem before, to no effect so far. Anyway, we never saw the intruder aircraft, so we were obliged to follow the TCASII directions. Once clear of conflict, we resumed normal vectors to a visual approach and landing with no further problems.

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Original NASA ASRS Text

Title: NMAC RESULTS IN A TCASII RA BEING FLOWN. RPTR COMPLAINS OF VOLUME OF AUTOPLT DISCONNECT, WARNING VOLUME HINDERING RADIO COM.

Narrative: LATE AFTERNOON, WX CAVU, LEVEL AT 5000 FT. JUST PRIOR TO TURNING DOWNWIND WITH ORF APCH, NOTED TCASII INDICATION OF ACFT 500 FT BELOW AND CLBING HEADING STRAIGHT FOR US. UNABLE TO VISUALLY LOCATE OTHER ACFT. GOT TCASII RA COMMAND TO 'CLB, CLB!' AS OTHER ACFT CLBED TO WITHIN 200 FT ALMOST RIGHT UNDER US, FO WAS FLYING, DISCONNECTED AUTOPLT, AND CLBED TO 6000 FT BEFORE TCASII WARNING ABATED. ORF APCH CTL SEEMED A LITTLE AGITATED. WE COULDN'T HEAR MUCH OF WHAT THEY SAID BECAUSE OF THE OBNOXIOUSLY LOUD AND REPETITIVE AUTOPLT DISCONNECT WARNING, WHICH IS A WHOLE SAFETY ISSUE ITSELF. I'D REALLY LIKE TO SEE IT CHANGED TO A MORE CONVENTIONAL AURAL WARNING WHEN IT'S INTENTIONALLY DISCONNECTED. I'VE DEBRIEFED AND NOTED THIS PROB BEFORE, TO NO EFFECT SO FAR. ANYWAY, WE NEVER SAW THE INTRUDER ACFT, SO WE WERE OBLIGED TO FOLLOW THE TCASII DIRECTIONS. ONCE CLR OF CONFLICT, WE RESUMED NORMAL VECTORS TO A VISUAL APCH AND LNDG WITH NO FURTHER PROBS.

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.