As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT NR 517 - DURING APPROACH TO ORD WHEN LANDING GEAR EXTENDED, LEFT MAIN LANDING GEAR REQUIRED FOUR ATTEMPTS PLUS POSITIVE G-FORCE TO LOCK IN THE DOWN POSITION. AIRCRAFT LANDED ORD WITHOUT INCIDENT. CLEANED AND LUBRICATED LEFT MAIN LANDING GEAR DUE TO PIVOT POINTS FOUND DRY. ACCOMPLISHED LANDING GEAR RETRACTION CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)