What was found
THE FLOW DIVIDER ON TOP OF THE ENGINE AT THE SPINE HAS A SMALL COMPENSATION HOLE ABOVE THE DIAPHRAGM. IF THE DIAPHRAGM HAS A PERFORATION, RAW FUEL WILL RISE ABOVE THE DIAPHRAGM AND SPEW FROM THIS HOLE AND THUS CAUSE AND EXTREME FIRE HAZARD. I HAVE OBSERVED THIS EFFECT ON TWO ENGINE RUNS WITH DIFFERENT FLOW DIVIDERS. I KNOW OF NO STC/AD TO CORRECT THIS CONDITION. A SMALL TUBE LEADING TO BELOW THE ENGINE BAY WOULD CORRECT THIS UNSAFE CONDITION.I SUSPECT THIS CONDITION IS PRESENT ON MANY AIRCRAFT---I ALSO OBSERVED THIS HOLE ON A BARON FLOW DIVIDER. THE SERVICE MANUAL DOES NOT SPECIFY A TIME COMPLIANCE CHANGE.