Resolution: Removed cracked left elevator trim tab P/N 1159CSH2O500.1 S/N 147, with 10,8043 TSN, 5,663 CSN. Installed "serviceable" as removed from G-II S/N 055 trim tab P/N 1159CSH20500-1 S/N 57, with 18.947.2 TSN 7,651 CSN. MI work performed IAW GIIB AMM 27.04.00. Ref squawk 12.124 for CMP 272510. Parts U