As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS GEAR FAILS TO COMPLETE RETRACT CYCLE. FOUND 1500 PSI RELIEF VALVE OPENING PREMATURELY @ 1100 PSI. THIS CAUSED REPORTED CONDITION. FOUND THIS SAME CONDITION ON 560-0331 WITH 1417 HOURS. SUBMITTER RECOMMENDS TO ADD PRESSURE CHECK AT 300 HOUR INTERVALS WHEN GEAR SWINGS ARE PERFORMED.