What was found
ABORTED TAKEOFF AT 90 KNOTS, ON ACCOUNT OF CAPTAIN'S ATTITUDE FLAG IN VIEW. AFTER REVERSE, NR 4 GREEN LIGHT ON, SHUT ENGINE DOWN. REALIGNED INS AND FLAG WENT AWAY. STARTED NR 4 ENGINE AND GREEN LIGHT WENT OUT. THEN MADE NORMAL TAKEOFF. *S/D* INS OUT OF ALIGNMENT. NO MALFUNCTION OR ACTION CODES NOTED. REALIGNED INS, FLAG WENT AWAY. INS NR 1 SWAPPED WITH NR 3 AS A PRECAUTIONARY MEASURE. ALL INS SYSTEMS PASSED OPERATIONAL CHECK.