What was found
VERIFY POSITION MESSAGE SHOWS ON CDU AND POS SHIFT PAGE SHOWS LA RGE IRS DRIFT IRS-L DRIFT. PERFORMED IR FAILURE - FAULT ISOLATION REFERENCE: 34-21 TASK 803 FOR MESSAGE 34-21002 , ADIRS ENTER HEADING - FAULT ISOLATION REFERENCE: 34-21 TASK 808 FOR MAINT MESSAGE 34-21009 AND IR DATA INVALID - FAULT ISOLATION REFERENCE: 34-21 TASK 806 MAINT MESSAGE 34-21037 . NO CURRENT FAULTS FOUND . REALIGNED , AND ALL OPERATIONAL CHECKS NORMAL. PERFORMED ADIRS BITE PROCEDURE REFERENCE: 34-21 TASK 801 AND FIMS LISTED IN LOGPAGE 6363379 . ALL OPS CHECKS NORMAL . NO CURRENT FAULTS FOUND .