Waldron

During a cross-country flight, the pilot of the twin-engine airplane reported to air traffic control that he has 'lost an engine.' A witness observed the right engine hanging from its lower mounts as the airplane turned right and headed towards the nearest airport. The airplane impacted trees approximately 1 mile short of the runway threshold. Examination of the right engine propeller revealed that one of its blades was separated about mid-span. The separated tip section of the blade was not recovered. Metallurgical examination of the fracture surface revealed that the blade failed as a result of a fatigue crack that originated from corrosion pits on the camber surface (face) of the blade. The failed blade was examined approximately 6 hours prior to the accident in accordance with an airworthiness directive (AD 81-13-06 R2) that called for inspections of the blade for corrosion and fatigue. However, the inspections called out in the AD were only applicable to the blade fillet and shank regions, well inboard of the fracture location on the failed blade. Overhaul of the propeller in accordance with the propeller manufacturer's manual includes grinding of each blade to 'remove all visual evidence of corrosion.' According to the airplane's owner, the propellers had not been overhauled in the eight years that he had owned the aircraft. The maintenance records were destroyed in the accident, which precluded determination of the date and time of the last propeller overhaul. The accident airplane was being operated under Title 14 CFR Part 91, and therefore, the propellers were not required to be overhauled at specified intervals.

While in cruise flight at 24,000 feet msl, the pilot of the Piper Malibu Mirage advised Memphis Center that he had encountered icing conditions and was experiencing a fuel imbalance. The pilot requested and was cleared to deviate to the north. Subsequently, radio and radar contact were lost. A witness reported hearing the sound of the airplane's engine stop running and observed the airplane descending from the dark clouds in a nose down attitude and rotating clockwise. Residents of the area reported that the weather at the time of the accident was high ceilings with heavy rain just before and after the accident. There were thunderstorms with lightning in the area at the time of the accident. The wreckage of the airplane was scattered along an area of about four miles. The airplane was equipped with an autopilot, weather radar, and an ice protection system. The pilot had recently purchased the 1999 model airplane and had completed a Mirage initial training course. At the time of the accident the pilot had accumulated a total of 21.4 hours in the make and model of the accident aircraft. No anomalies were found with the airframe or engine that would have prevented normal operation.