What was found
FLT # 1557, FLL-CUN. GPS PRIMARY LOST, NAV ACCUR LOW, EST 30 MILES OFF ; PERFORMED RE-ALIGMENT OF ADIRUS IAW AMM 34-10-00. PERFORMED RESET AND TEST OF FCU 1 AND 2, ALSO FMGC 1 AND 2 IAW AMM 22-96-00 AND 22-91-00. TEST OK. PERFORMED RESET AND TEST OF GPS 1 AND 2 IAW AMM 34-36-00, OPS CHK OK. PERFORMED LAND CAT III CAPABILITY TEST IAW AMM 22-97-00, TEST OK. NO DEFECT NOTED. A/C OK FOR SVC.