TCASII RA GIVES FALSE WARNING; AUDIBLE ONLY; AND CREATES POTENTIAL CONFLICT WITH ARR TFC.

Narrative

ON CLBOUT OUT OF MIA; TCASII GAVE A TA (SEVERAL) FOLLOWED BY AN RA ADVISORY OF 'REDUCE CLB.' THE COPLT WAS FLYING AND WE LEVELED OFF AT 3500 FT AND ADVISED MIA DEP CTL OF OUR TA/RA ADVISORY. NO VISUAL RA SYMBOLS WERE VISIBLE ON THE TCASII CRT OR ANY COLORED ARC DISPLAYS ON EITHER IVSI'S. THIS VERBAL RA WAS MOST CONFUSING DUE TO THE ABSENCE OF THE PROPER VISUAL DISPLAYS. THE TCASII SYS WAS SET UP AS PER COMPANY OPERATING PROCS WITH A 10 NM RANGE AND 'ABOVE' SELECTED. THE RA THREAT MAY HAVE BEEN OUTSIDE THE 10 NM RANGE BUT I DOUBT IT. MIA DEP CTL ADVISED THERE WAS NO TFC ABOVE US WITHIN 15 NM WHEN WE CALLED THE RA AND RPTED WE WERE LEVELING AT 3500 FT. THEN; THE TCASII STARTED A PROPER SEQUENCE OF TA'S LEADING TO AN RA BECAUSE OF A NEW CONFLICT DUE TO OUR LEVEL OFF AT 3500 FT WHILE EVALUATING THE FIRST RA. WE NEVER VISUALLY IDENTED THE REASON FOR THE INITIAL RA AND I BELIEVE IT PROBABLY WAS A FALSE OR SPURIOUS ADVISORY. BUT; WE DIDN'T KNOW THAT OR CAN'T IGNORE THE RA DUE TO COMPANY AND FAA RULES. THE DEP CTLR WAS UNDERSTANDING OF OUR SIT AND ADVISED THE SECOND TA/RA SEQUENCE WAS DUE TO ARR TFC LEVEL AT 3000 FT. WE CONTINUED OUR CLB WITH URGING FROM BOTH THE CTLR AND THE TCASII RA. MY CONFIDENCE IN TCASII IS PARTIALLY DUE TO PAST FALSE RA'S BUT NO ONE CAN OR SHOULD IGNORE ANY RA'S. BUT; THE SYS IS FAR FROM PERFECT DUE TO THE VAST COMPLEXITIES AND THE STILL DEVELOPING SOFTWARE TCASII PROGRAMS. HOPEFULLY; BOTH CTLRS AND PLTS CAN CONTINUE TO WORK WITH AND DEVELOP THE TCASII SYS. ONE 'SAVE' WILL BE WORTH ALL THE FALSE TA'S/RA'S.