Furthermore, in addition to the earlier requirement for no paint on mating faces or where screw heads bear, a broad requirement was introduced to ensure that no paint, thread-locking compound, or contaminants remain in the propeller flange joint.
ATA CHAPTER FOR PAINTING AIRCRAFT MANUAL
The current (revised) issue of the Engine Overhaul Manual has a strong recommendation that these dowels should be installed at the next full overhaul or at bulk strip of engines manufactured prior to July 2011. Jabiru engines manufactured before July 2011 (pre-engine S/N 2446) have reduced strength and reliability of the crankshaft/propeller flange joint, compared with the later design that incorporated positive location dowel pins. However, that modification was not extended to earlier design assemblies, which included this specific Jabiru J430 aircraft engine. In July 2011, the engine manufacturer improved the strength and reliability of the crank–flange joint by adding positive-location dowels in all new production engines. It was also found that there were some anomalies within the maintenance documentation that related to these areas. This movement was traced to a combination of an ineffective, multi-step torqueing method and the relaxation of tension within the crank–flange joint due to the compression of multiple layers of paint within the joint. The Australian Transport Safety Bureau (ATSB) investigation found that most of the cap screws connecting the propeller mounting flange to the engine crankshaft had failed by bending fatigue fracture – principally due to repeated relative movement between the mounted components. The pilot of VH-TJP was uninjured and able to disembark the aircraft safely. This CAN is prompted by a recent propeller loss on a Jabiru 2200A engine and a propeller loss in 2003 on Jabiru J430, VH-TJP in Australia, which resulted in a forced landing upon tidal flats at the western edge of Westernport Bay in Victoria. This Continuing Airworthiness Notice (CAN) is issued to advise Jabiru engine operators of the safety recommendations identified by the Australian Transport Safety Bureau (ATSB) with an investigation of a propeller loss on a Jabiru J430 aircraft in Australia.
ATA CHAPTER FOR PAINTING AIRCRAFT SERIES
This Continuing Airworthiness Notice (CAN) is issued to advise Jabiru engine operators of the safety recommendations identified by the Australian Transport Safety Bureau (ATSB) with an investigation of a propeller loss on a Jabiru J430 aircraft in AustralĪll Jabiru 22 series aircraft engines.
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