What was found
EMERGENCY DECLARED DUE TO ALT LAW DISPLAYED.NAV ADR DISAGREE...LOST BOTH AP. BOTH FD. AND AUTOTHROTTLE POST FLIGHT REPORT SHOWES NAV ADR 3. FAULT. TEST OF IR 3 FAILS. TEST OF FCDC 1 ALSO SHOWS ADR 3 FAULT PFR SHOWS NAV ADR 3 FAULT, REPLACED ADIRU 3, 1FP3, PER MM 34-12-34-401, IR 3 AND ADR 3 BITE TEST OK, ACCOMPLISHED LAND CAT 3 CAPABILITY TEST PER MM 22-97-00-501, TEST OK. AIRCRAFT RETURNED TO FULL CAT 3 STATUS. REF LOG PAGE 9660132 PARTS USED: 31-3411-9-0002,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1766167 SN OFF 6050 UNIT, AIR DATA OFF 31-3411-9-0002 6050 ON 31-3411-9-0002 5730