As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO RETRACT GEAR AFTER TAKEOFF, PROXIMITY SYSTEM FAULT 1 ON EICAS. FOLLOWED PROCEDURES & RETURNED FOR LANDING. DEFERRED LANDING GEAR RETRACT SYSTEM. M PROCEDURES COMPLIED WITH MEL 32-1. ADJUSTED NLG WOW SENSORS IAW AMM 32-61-05. OPS CHECK GOOD.