Schweizer 269D Configuration A (Schweizer 333), G-TAMA
Report name:
Schweizer 269D Configuration A (Schweizer 333), G-TAMA
Schweizer 269D Configuration A (Schweizer 333), G-TAMA
Registration:
G-TAMA
G-TAMA
Type:
Schweizer 269D Configuration A (Schweizer 333)
Schweizer 269D Configuration A (Schweizer 333)
Location:
Sheffield City Airport
Sheffield City Airport
Date of occurrence:
04 February 2008
04 February 2008
Category:
General Aviation - Helicopters
General Aviation - Helicopters
Summary:
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.
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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