What was found
THE PILOTS GOT AN INTERMITTENT TAIL COMPARTMENT TEMP HIGH WARNING LIGHT ON CLIMBOUT. THE PILOTS DIVERTED TO BUF DUE TO BOTH FIRE EXTINGUISHER AGENT LOW LIGHTS BEING ILLUMINATED. MAINTENANCE REPLACED BOTH FIRE EXTINGUISHING AGENT BOTTLES, BOTTLES WERE EMPTY. MAINTENANCE FOUND A CLAMP LOOSE AT THE LEFT FLOW CONTROL VALVE BLOWING HOT AIR ONTO THE EXTINGUISHER BOTTLES. MAINTENANCE TIGHTENED THE CLAMP AND REPLACED BOTTLES. A CHECKOUT WAS PERFORMED AND THE AIRCRAFT WAS RETURNED TO SERVICE (2010-D0842)(DLM88101920).