As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE, IT WAS DISCOVERED THAT ONE EACH SET SCREW MISSING FROM LT OB, RT IB, AND RT OB LEVER ARMS AND 2 EACH SET SCREWS MISSING FROM LT IB LEVER ARM. PROBABLE CAUSE; UNKNOWN AT THIS TIME. MISSING SET SCREWS (PN 632UNC-2A) MUST BE INSTALLED IAW MFG MM.