EASA Approves STC for Hartzell Alternator Upgrades

The supplemental type certificate covers a number of airplanes along with several models of Robinson and Sikorsky helicopters.

Meg Godlewski

Monday, August 14, 2023 at 02:04 PM ET

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Typical Lycoming engine installation of Plane-Power ALT-FLX alternator. [Courtesy: Hartzell Aviation]

Key Takeaways:

EASA has granted Hartzell Engine Tech Supplemental Type Certificate (STC) approval for Plane-Power ALT-FLX alternator upgrades in Europe.
The STC covers a wide variety of piston-powered airplanes and helicopters, including models from Aviat, Beechcraft, Cessna, Piper, Robinson, and Sikorsky.
The Plane-Power ALT-FLX alternators offer high power output, providing up to 100 amps in 12-volt systems and 150 amps in 24-volt systems, with weights comparable to replaced units.

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The European Union Aviation Safety Agency (EASA) has granted Hartzell Engine Tech supplemental type certificate (STC) approval for Plane-Power ALT-FLX alternator upgrades in a wide variety of piston-powered airplanes and helicopters.

The STC was previously approved in the U.S. by the FAA.

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According to Hartzell, the EASA STC covers a number of Aviat, Beechcraft, Cessna, Cirrus, Diamond, Extra, Mooney, Piper, and SOCATA airplanes along with several models of Robinson and Sikorsky helicopters.

The STC approved Plane-Power ALT-FLX alternators that “provide up to 100 amps in a 12-volt electrical system and up to 150 amps in a 24-volt system,” Keith Bagley, Hartzell Tech president, said in a statement. “Weights are comparable to replaced alternators, and kits provided contain all the brackets and hardware needed to complete the upgrade.”