What was found
AUTO FAIL LIGHT LIGHT ON AND ALTN LIGHT ON, AUTO FAIL LIGHT GOES OFF WHEN PRESSURIZATION MODE SELECTOR SWITCH IS AT ALTN CONTROLLER, CAB OFF 29-2131-9-0003 8011 ON 58-2131-9-0002 7023 CONTROLLER, CAB OFF 29-2131-9-0003 8011 ON 0000 TRIED TO PERFORM BITE TEST FIM 21-31-00 OF DCPC 2 AND HAD NO RESPONSE FROM LRU. REMOVED AND REPLACED DCPC 2 AMM 21-21-01. OPS CHECK SAT. PARTS USED: 29-2131-9-0003,QTY :1 ADD EMP:U085461 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1534125 SN OFF 8011