Bevel gear

June 3, 2014 - 5:10am

EASA has certified a redesigned vertical bevel gear shaft for the Airbus Helicopters EC225, which was grounded for nine months in 2012 and 2013 after a series of in-flight failures. Manufacture of the redesigned gear shaft is under way for production aircraft and retrofits, with first installations (for both applications) planned for this year’s second half.

The new design provides corrosion resistance, compensates for residual stress and eliminates stress hot spots, eliminating all three factors that, combined, caused two unexpected vertical shaft failures.

April 24, 2014 - 2:37pm

The EASA has certified the redesigned vertical bevel gear shaft for the Airbus Helicopters EC225, which has suffered in-flight failures and a nine-month grounding in 2012 and 2013. Manufacturing of the redesigned gear shaft is under way for production aircraft and for retrofits, and installations for both applications are slated to begin in the second half of this year.

June 12, 2013 - 10:50am

Aerometals has received PMA approval for spiral bevel gears for the main rotor transmission of the MD500. According to the company, the approval marks the first time the FAA has granted manufacturing approval for transmission gears to a company that is not the OEM. The testing required a test stand using a 500-hp electric motor instead of a gas turbine. The MD transmission is rated for 425 hp for up to five minutes, but Aerometals ran the gears for eight hours at 467 hp to satisfy FAA testing requirements.

 
X