As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB RECEIVED A ICAS MESSAGE OF LDG AIR/GND FAIL AT ROTATION. LANDING GEAR WOULDN'T RETRACT. AIR RETURN AND MAINT FOUND PROX SWITCHES OUT OF ADJUSTMENT. DID A RE-ADJUSTMENT OF THE SWITCHES AND DID THE GEAR SWINGS AS REQUIRED. A/C WAS PUT BACK INTO SERVICE. ALL WORK WAS IAW EMB 135/145 AMM32-34-00 GEAR SWINGS AND 32-62-00 ADJUSTMENT OF SWITCHES.