What was found
ENROUTE, FA CREW REPORTS A BRIEF PUFF OF SMOKE FOLLOWED BY AN ELECTRICAL ODOR FROM THE MID RT LAVATORY FA CALL SWITCH. SMOKE AND ODOR OCCURRED WHEN THE CALL SWITCH WAS RESET. ODOR AND SMOKE DISSIPATED QUICKLY. NO ABNORMAL INDICATIONS IN THE FLIGHT DECK. UNEVENTFUL APPROACH, LANDING, AND TAXI TO THE GATE. NO EMERGENCY OR OTHER ABNORMAL PROCEDURES PERFORMED. MAINTENANCE CHECKED ASSOCIATED WIRING AND COMPONENTS. ERA ISSUED TO CAP/STOW CONNECTOR TO SUSPECT SWITCH. REPLACED THE PASSENGER SERVICE UNIT CALL BUTTON AND LIGHT HOUSING PER ER/A 555192-14.