Hartzell Aviation worker in factory

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HARTZELL ENGINE TECH
Hartzell Engine Tech Achieves FAA PMA For Robinson Helicopter Sky-Tec Starters

Hartzell Engine Tech recently received FAA Parts Manufacturer Approval (PMA) for its Sky-Tec HT (High Torque) starters for Robinson two-place R22 and four-place R44 light utility helicopters.