What was found
THE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF FROM EWR. THE ABNORMAL CHECKLIST WAS COMPLETED AND THE AIRCRAFT WAS RETURNED TO EWR WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE AIR SAFETY SENSOR OUT OF ADJUSTMENT. THE SENSOR WAS ADJUSTED IAW MM 32-09-01. AN EXTENSION AND RETRACTION OF THE LANDING GEAR WAS PERFORMED IAW MM 32-32-00 AND OPERATION AND INDICATIONS CHECKED GOOD.