Failure analyses of various engine and airframe components from South African Air Force aircraft have been performed by the division of Materials Science and Technology over several years and these have ranged from crash investigations to minor problems encountered during routine maintenance. Four examples are discussed in this paper. A foreign object damaged the compressor blades of engine of a C47. The analysis of the damaged region shows a higher value of Si content. It is possible that a stone from untarred runway damaged the turbine blade. The second example describes the collapse of a landing gear strut from a C47 aircraft. The collapse was caused by an embrittlement due Al3Mg2 precipitations. The third example describes a premature degradation of nozzle guide vanes of the Allison T56 engine by overheating. The last example was the failure of a first stage reduction gear carry assembly. The fracture surface examination shows no fatigue cracking or material defects. The failed gear was not the cause of the crash.
Some failure analyses of South African Air Force aircraft engine and airframe components
Einige Schadensanalysen von Flugtriebwerken und Flugzeugkomponenten der südafrikanischen Luftwaffe
Engineering Failure Analysis ; 5 , 2 ; 105-112
1998
8 Seiten, 9 Bilder, 3 Tabellen, 3 Quellen
Aufsatz (Zeitschrift)
Englisch
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