Due to a deviation in the manufacturing process some tailpipe of muffler may have anomalies in the welded joint. In some cases, there is possibility that cracks may occur on a limited number of muffler tailpipe. Undetected cracks during pre-flight check may result in a loss of tailpipe.
Due to repeated non-compliance with service instructions of the emergency system manufacturer and in order to increase the emergency system safety the airplane manufacturer points out on the compliance with service instructions of the emergency system manufacturer.
The manufacturer of Rotax 914 F a Rotax 914 UL engines informs about a possibility of clutch slipping during the engine operation, which can lead to an undesirable increase of engine speed above the set limit.