As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING GEAR EXTENSION, THE GEAR HANDLE BUTTON STUCK IN PLACE IN DOWN POSITION WITH AN UNSAFE GEAR INDICATION. RECYCLED GEAR AND MANUALLY PUSHED HANDLE IN AND GOT NORMAL GEAR INDICATIONS. LUBED GEAR HANDLE RELEASE BUTTON AND GEAR HANDLE PIVOTS.