As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER GEAR UP DURING CLIMB, LEFT GEAR UNSAFE LIGHT AND GEAR NOT LATCHED LIGHT REMAINED ON. FOLLOWED ABNORMAL PROCEDURES PER FOM. DETERMINED THAT DOOR WAS LATCHED AND GEAR WAS NOT LATCH. FOLLOWED FOM PROCEDURES. FOUND PUSHED PIN AT LEFT GEAR UP LATCH SWITCH RESEATED PIN AS REQUIRED CHECKS NORMAL DC8 MM 32-60.