As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO FIELD DUE TO LANDING GEAR FAILING TO RETRACT. LANDING GEAR LEVER WOULD NOT MOVE FROM DOWN POSITION. FOLLOWED APPROPRIATE CHECKLIST AND RETURNED TO AIRPORT. MX PERFORMED NLG STRUT SERVICING IAW EMB 170 JOBCARD S12-12-09-600-801A, REFERENCE FIM 32-33-00-810-802A.