As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAP POWER DRIVE UNIT FAILED. NR 3 ACTUATOR PN 674D100-18 RIGHT SIDE HAD HIGH INPUT TORQUE WHEN COLD-SOAKED FOLLOWING SIL 1125-27-082. CHANGED POWER DRIVE UNIT AND ACTUATOR FAILED SN 137 PDU, 26 HRS LATER. SUBMITTER SUGGESTS TO REVISE TESTING INSTRUCTIONS.