As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKE OFF, LANDING GEAR WOULD NOT RETRACT AND AUTOPILOT WOULD NOT ENGAGE. NO EICAS MESSAGES. FLIGHT RETURNED TO YVR REPLACED SOCKETS ON P34 (NOSE WOFW PROX SNS2) REF WDM 32-62-50. REPLACED NOSE WOFW SENSOR 1 PER AMM 32-62-01 PB 401. GEAR SWING CARRIED OUT PER AMM 32-33-00-710-801A.