What was found
TCAS RA CLIMBING THRU 5000..CLIMB FOR 2000 FOLLOWED BY DESCEND WITH NO VISIBLE TRAFFIC, WORK WITH FIM 34-45 TASK 801. MTX WORKING ITEM REF LP 9587435 FOR WORK PERFORMED TCAS RA CLIMBING THRU 5000. CLIMB FOR 2000 FOLLOWED BY DESCEND WITH NO VISIBLE TRAFFIC REF LP 9586057. WORK WITH FIM 34-45 TASK 801. RAN TCAS BITE TEST WITH ATC IN POSITION 1 & 2 AND ALL TEST PASSED WITH NO FAULTS. IAW FIM 34-45 FAULT TREE 802. NEEDS FURTHER TROUBLE SHOOTING. ACFT MOVED OFF GATE TO THE HANGAR. R & R TCAS COMPUTER IAW AMM 34-45-01. OPS CHKD GOOD.