As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING INITIAL RETRACTION WHEN THE GEAR WAS SELECTED UP THE LEFT GEAR STAYED DOWN. WHEN THE GEAR WAS SELECTED DOWN EVERYTHING WAS NORMAL ON THE INDICATOR.INSPECTION REVEALED THAT THE SHEAR PIN ON THE LEFT GEAR WAS MISSING.THE GEARS WERE LUBRICATED & THE BOTH LT & RT SHEAR PINS REPLACED.