As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LANDING GEAR FAILED TO RETRACT AFTER DEPARTURE, EMERGENCY DECLARED WITH ATC AND RETURNING TO DEPARTURE. FOUND WATER IN WOW SENSOR NR 1 AND CORROSION ON PINS ALSO CMC FAULTED NLG WOWNR 2 SENSOR . WOW SENSOR NR 1 AND SENSOR NR 2 REPLACED IAW AMM 32-62-01-400-801A. TEST CARRIED OUT IAW AMM 32-62-01-720-801A . GEAR SWING CARRIED OUT .CHECKED SERVICEABLED.