As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK, AFTER TAKE-OFF LANDING GEAR HANDLE IN UP POSITION AMBER GEAR DISCREET LIGHT ON AND EICAS GEAR DISAGREE MSG. QRH PROCEDURE COMPLETED AIR TURN BACK TO SLC. PERFORMED NOSE GEAR SWING IAW AMM 32-34-00. OPS CHECKED GOOD AND GEAR SWING TIMES ARE WITHIN AMM OPERATING LIMITS.