As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKING OFF, PILOT TRIED TO RETRACT THE LANDING GEAR, GEAR CAME OFF OF DOWN LOCKS BUT STOPPED A FEW SECONDS AFTER RETRACT ATTEMPT. PILOT CHECKED C/B’S BUT NONE WERE TRIPPED AND CYCLED GEAR SELECTOR SWITCH WITH NO CHANGE. PULLED THE EMERGENCY GEAR EXTENSION AND RETURNED TO BASE WITH NO FURTHER INCIDENT. POWERPACK UNSERVICEABLE.