What was found
FLT#1882, IAH-JFK. ' RECEIVED "NAV LS TUNING DISAGREE" AFTER TAKEOFF ACCOMPANIED BY "INOP SYS CAT II"; NO-FAULT NOTED ON PFR, RESET ADIRU 1,2 AND 3 PER TSM 34-13-00. NO MSG PRESENT SEE FOLLOWING ITEM (ACCOMPLISHED AFS TEST PER MM 22-96-00 TEST OK PERFORMED LAND CAT III TEST PER MM 22-97-00. TEST PASS, NO FAULTS PRESENT. A/C OK TO CONTINUE IN CAT III SERVICE) FOR REQ CAT III TEST.'