As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAIN GEAR DID NOT RETRACT, RED GEAR LIGHT REMAINED ILLUMINATED WITH GEAR IN OFF POSITION. BOTH GREEN GEAR DOWN INDICATIONS OVERHEAD AND MAIN CONSOLE WERE ILLUMINATED. FOUND ONE LT MLG UPLOCK SPRING MISSING. REPLACED BOTH SPRINGS. JACKED A/C AND PERFORMED GEAR RETRACTION PER MM, GEAR SWING OK.