What was found
PILOT REPORTED FLAP CONTROL CIRCUIT BREAKER TRIPPED WHEN FLAPS SELECTED UP. C/B WOULD NOT RESET. MAINTENANCE FOUND FLAP LIMIT SWITCH ON LT FLAP ACTUATOR INTERNALLY SHORTED TO GROUND. INSTALLED NEW SWITCH, P/N 602EN16-6, AND ADJUSTED AND SAFETIED IAW CESSNA S550 MM. PERFORMED OPERATIONAL CHECK OF FLAP SYSTEM AFTER RESETTING C/B, NO DEFECTS. FLAP SYSTEM NOW OPERATING NORMALLY. REF: CESSNA CITATION S550 MM CH 27-51-OU FOR REMOVAL AND REPLACEMENT PROCEDURES OF SWITCH. SUSPECT HIGH TIME PART LED TO FAILURE.