MD88 FLC INITIATES TCASII EVASIVE ACTION MANEUVER DUE TO SAME ALT CONFLICTING TFC WHEN DEVIATING AROUND WX.

Narrative

A LINE OF NUMEROUS TSTMS WERE IN AN E-W LINE ABOUT 30-40 NM S OF ATLANTA. WE (X) WERE ON AN IFR FLT PLAN FROM N; THROUGH ATL AND S THROUGH SEMINOLE (SZW) VOR. WE WERE CLRED TO DEVIATE 'AS NECESSARY; DIRECT SZW WHEN ABLE.' WE DEVIATED E OF ATL AND WERE JUST CLRING THE LINE OF STORMS AFTER HAVING TURNED R TO A SOUTHWESTERLY HEADING. ZTL INSTRUCTED US TO 'TURN L 090 DEGS.' WE WERE UNABLE DUE TO A NEAR TSTM CELL IN THAT DIRECTION. WE STATED THAT AND SAID WE COULD FLY 180 DEGS. CTR CONCURRED AND SAID TO TURN IMMEDIATELY FOR TFC; WE DID. CONCURRENTLY; WE NOTED TCASII TFC AT 1-2 O'CLOCK POS INSIDE 10 MI. THIS RAPIDLY CHANGED TO A TA. CTR HAD BEEN ATTEMPTING TO CONTACT THE ACR Y FLT IN CONFLICT WITH US. CTR FINALLY ESTABLISHED CONTACT WITH ACR Y AND TOLD THEM TO TURN L TO 360 DEGS IMMEDIATELY. WE THEN GOT AN RA WITH A 'CLB' COMMAND. WE INITIATED A CLB AND GOT TO FL333 AND RECEIVED TCASII 'CLR OF TFC.' ACR Y RPTED THEY HAD COMPLIED WITH A TCASII 'DSND' RA THEMSELVES. TCASII SHOWED CLOSEST DISTANCE AT 3-4 MI. CTR THEN HANDED US OFF TO A DIFFERENT SECTOR AND SAID NOTHING ABOUT THE INCIDENT.