As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON TAKEOFF FROM ORD, LEFT MAIN GEAR INDICATED UNSAFE ON BOTH PRIMARY AND SECONDARY INDICATIONS AFTER RAISING GEAR HANDLE. RAN CHECK LIST-RECYCLED GEAR DOWN THEN BACK UP- BOTH PRIMARY AND SECONDARY INDICATIONS SHOWED GEAR UP AND LOCKED. CONTINUED TO ANC. UPON APPROACH INTO ANC GEAR EXTENSION WAS NORMAL- GOOD INDICATIONS BOTH PRIMARY AND SECONDARY. ** S/D ** R/R LT MLG RETRACT CYLINDER.