As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INSPECTION, A HYDRAULIC LEAK WAS FOUND AT FLAP ACTUATOR LINE INLET. ON DISASSEMBLY, DEBRIS WAS NOTICED IN LINE. A FURTHER INSPECTION FOUND ALL COMPONENTS OF FLAP SYSTEM HAD THICK DEBRIS THAT MAY BE MIL5606 CONTAMINATED WITH MOISTURE.