As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION FLAPS MOVED ERRATICALLY. UPON FURTHER INSPECTION OF LEFT OUTBOARD FLAP ACTUATOR, FOUND 5.50 INCH CRACK RUNNING THE LENGTH OF THE PISTON ACTUATOR (REF: BEECH B300 IPC, CHAPTER 27-50-00, PAGE 2, ITEM NR 19). RECOMMEND CLOSER INSPECTION OF FLAP ACTUATOR PISTONS IN THE EXTENDED POSITION.