Abstract
Direct metal deposition process has been adopted for repair of oil pump gear shaft of an aero engine. The process is first optimized for the specific application of oil pump gear shaft material on a specimen and then the actual part was applied with deposition. The deposition on the gear shaft is validated through stringent quality checks and functionality check of the oil pump during bench test and engine test. The successful adoption of the deposition process is able to prevent failures which would otherwise cause catastrophic failure of the aero engine. Oil pumps are now withdrawn from service at a predetermined time prior to its scheduled inspection and overhaul for application of metal deposition.
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