As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WOULD NOT RETRACT. RETURNED TO LAX. *S/D* PSEU REGISTERED AIR/GROUND DISAGREE PROBLEM. COULD NOT DUPLICATE DURING GEAR SWING. AIR/GROUND DISAGREE PROBLEM RETURNED ON LATER FLIGHTS. FOUND RIGHT MLG TRUCK TILT SENSOR SUPPORT BRACKET LOOSE. HOLES SLIGHTLY ELONGATED. THIS WOULD CHANGE TARGET GAP AT SENSOR RESULTING IN THE AIR/MESSAGES. REPLACED BRACKET.