What was found
(CAN) ON TAKEOFF, GEAR WOULD NOT RETRACT, GEAR TILT MESSAGE ON ENGINE AND CREW ALERTING SYS. AIRCRAFT RETURNED, OTHER INDICATIONS SHOWED A/C STAYED IN GROUND MODE. FOUND TRUCK TILT PROXIMITY SWITCH SUPPORT BRACKET INCORRECTLY INSTALLED AND DAMAGED. BRACKET REPAIRED AND SENSORS ADJUSTED, GEAR SWING CARRIED OUT. SYS NORMAL.