As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, NOSE GEAR DID NOT RETRACT, ECAM LANDING GEAR NOT UPLATCHED AND LANDING GEAR DOORS NOT CLOSED. AFTER ONE MINUTE THE GEAR RETRACTED AND ECAM CLEARED. AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND FAULTING PROXIMITY SENSOR (24GA) AND REPLACED SENSOR PER AMM 32-31-73.