What was found
DURING CLIMB PASSING 10,500 FT THE FLIGHT ATTENDANT NOTICED AN INCREASE IN NOISE LEVEL AROUND THE SERVICE DOOR. THE F/A REPORTED THAT THE GREEN INDEX MARKS ON THE INDICATOR WINDOW WERE NOT ALIGNED. COCKPIT INDICATIONS WERE NORMAL. THE FLIGHT RETURNED TO PHL WHERE MAINTENANCE OPERATIONALLY CHECKED THE SERVICE DOOR IAW CRJ200 AMM 52-41-00-710-801. OPS CHECKS WERE GOOD. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.