What was found
ON CLIMBOUT, RT ENG BEGAN TO RUN ROUGH AND LOSE PWR. AFTER TURNING FUEL BOOST PUMP SHOWED NO IMPROVEMENT, AND PILOT FEATHERED ENG AND RETURNED TO BASE. AFTER LANDING AND UPON ROLLOUT, NLG COLLAPSED, LT PROP TIPS CONTACTED RUNWAY. RT ENG WAS FOUND TO HAVE SEVERAL IGNITION LEADS DAMAGED DUE TO FIRE DAMAGE, AND FIRESLEEVE ON SOME HOSES AROUND FUEL PUMP AREA WERE SINGED. EXACT CAUSE OF FIRE IS UNKNOWN, BUT APPARENTLY FUEL LEAK DEVELOPED AROUND PUMP AREA WHICH WAS IGNITED BY EXHAUST. CAUSE OF N/G FAILURE IS UNKNOWN. UNDER PWR OF AUXILIARY HYD PUMP, N/G EXTENDED AND LOCKED NORMALLY WHEN NOSE WAS LIFTED AND DAMAGED GEAR DOORS WERE UNJAMMED. PILOT REPORTED 3 GREEN LIGHTS AND NORMAL HYD PRESSURE BEFORE LANDING.