11/15/2022 0 Comments Sensenich propeller serial numbersThe airplane slid across the runway and came to rest between two runway lights. The pilot stated that during the approach, the airplane started to porpoise, so he elected to touch down in the grassy area west of runway 35 to absorb some of the landing energy.ĭuring the landing, the nose landing gear collapsed and the nose wheel separated from the aircraft. The pilot initiated an emergency landing to a field however, noticing that his glide ratio had improved without the propeller, he decided to land at the Claremore Municipal Airport. According to the pilot, the vibration became more violent, and subsequently, the propeller departed the aircraft's engine. The flight originated from the pilot's private grass strip near Ketchum, Oklahoma, at 0815, and was destined for the Oklahoma City Downtown Airport.ĭuring an interview conducted by the NTSB investigator-in-charge (IIC), the pilot stated that the airplane was in cruise flight at 2,500 feet msl, when he noticed a vibration. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The commercial rated pilot, sole occupant and owner/operator of the airplane, was not injured. On May 8, 1999, at 0830 central daylight time, a Grumman American AA-5B airplane, N4546J, was substantially damaged during a forced landing following the separation of the propeller while in cruise flight near Claremore, Oklahoma. Over time the pinched sections of aft spinner bulkhead fail, leaving the propeller loose. The mechanic will then torque the propeller bolts with the aft spinner bulkhead pinched between the propeller spacer and the bushings. According to FAA service difficulty reports and reports from mechanics, the potential exists for the aft spinner bulkhead to slide off of the crankshaft flange bushings and rest on the propeller bolts during installation. Examination of the aft spinner bulkhead revealed that crescent shaped arcs had been punched out, elongating the bulkhead's bolt holes. Examination of the propeller attaching bolts revealed that they failed in fatigue. During landing, the nose gear collapsed and the nose wheel separated from the airplane. During the approach, the airplane porpoised, so the pilot elected to touch down in a grassy area between the runway and ramp area. The pilot made a forced landing at the Claremore Municipal Airport. While in level cruise flight, the propeller separated from the airplane.
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