What was found
CAPT`S SPD, ALT, VSI, FD, PITCH, AND NR 1 X-PONDER FAILED AT CRUISE ALTITUDE. NR 1 ADIRU FAILED CONFIRMED BY SWAPPING 1& 2 ADIRU. REMOVED AND REPLACED NR 1 ADIRU PER MM 34-21-01, OPS CHECK GOOD. DOWNGRADED A/C TO NOT CAT II REF L.P 8887242. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1481761 SN OFF 00941. 34-21007 FAULT CODE, 34-21023 FAULT COMMENTS: NO ALT AND AIRSPEED UNIT, ADIRU, AI OFF 29-3421-9-0010 0941 ON 29-3421-9-0010 6262.