As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CVG - ON GEAR RETRACTION WITH THE GEAR LEVER IN THE UP POSITION LEFT MAIN GEAR RED AND GREEN LIGHTS STAYED ON. ALL OTHER INDICATIONS WERE NORMAL. GEAR EXTENSION AND RETRACTION OPERATED NORMAL. CLEANED CONNECTIONS ON LANDING GEAR ACCESSORY UNIT. OPS CHECKED NORMAL IAW B727 MM CHAP 32-09-121. (M)