As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(REF CNTRL NR WW1045) RECOVERED AIRCRAFT FROM TAXI WAY AFTER A LANDING WITH NO MLG GREEN LIGHTS. LT GEAR STARTED RETRACTING DURING TAXI. FOUND LT AFT GEAR RETRACT ACTUATOR PISTON ROD BROKEN INSIDE PISTON WHICH HAD CAUSED A MIS-DIRECT OF GEAR DOWN FLOW TO ROUTE INTO RETURN AND UNLOCKING THE GEAR JURY BRACE. THE PISTON ROD HAD BEEN CRACKED FOR A PERIOD OF TIME APPROX .3333 THROUGH PRIOR FAILURE. (K)