As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE LEFT MAIN ON TAKEOFF. DIVERTED. EMERGENCY-DECLARED. GEAR CAME DOWN NORMALLY. (FLT 5137) CLOSED PSEU REPORTS "S20 FAR" INSPECTED LT MLG UPLOCK PROX SWITCH AS REQUIRED, FOUND GAP TO BE .056", ADJUSTED PROX SWITCH TO TARGET GAP TO .037" IAW AMM. FOUND LT UPLOCK ROLLER TO BE VERY STIFF, CLEANED AND FREED UP LT UPLOCK ROLLER AS REQUIRED. COMPLETED GEAR EXTENSION AND RETRACTION CHECKS WITH NO DISCREPANCIES NOTED, OPS CHECKS GOOD. AIRCRAFT OK FOR CONTINUED SERVICE.