As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 1782 - AFTER TAKEOFF ORD LEFT MAIN LANDING GEAR WOULD NOT RETRACT. CYCLED GEAR THREE TIMES WITH SAME RESULTS. RETURNED AND LANDED ORD WITHOUT INCIDENT. ADJUSTED UPLOCK BRACKET STOP, INSTALLED NEW LOCK-TANG AND SAFETY TIED PER MM. RETRACTED GEAR SEVERAL TIMES. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)