Schweizer 269D Configuration A (Schweizer 333), G-TAMA, 4 February 2008

Schweizer 269D Configuration A (Schweizer 333), G-TAMA


After landing on a post-maintenance flight, the helicopter suffered a seizure of the main rotor gearbox pinion outer bearing due to oil starvation. The main rotor gearbox had been replaced during the recent maintenance. It was determined that maintenance personnel had inadvertently caused metallic debris to enter the bearing oil supply gallery during their attempts to remove a blanking plug from the gearbox low oil pressure switch port, which had been overtightened.

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Schweizer 269D Configuration A (Schweizer 333) G-TAMA, 08-08.pdf (498.22 kb)

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