
Tanis Aircraft Products, a division of Hartzell Propeller, has received an STC for its preheating system on the Daher TBM 700 model series. The company also won Parts Manufacturer Approval (PMA) on the system’s kit.
The TBM STC will cover all Daher TBM 700-series turboprops — the original TBM 700 through the recently certificated TBM 980, applying to all serial numbers and model years over the TBM’s more than 35 years in service, according to company officials.
The Tanis TBM kit offers a multipoint configuration through a self-regulating system to deliver preheating to the turboprop’s overall powerplant installation, including the:
- Engine
- Prop reduction gearbox
- Oil cooler
- Fuel control unit
- Accessory gearbox
- Battery

The system also provides avionics and cabin preheating, with LED power indication and circuit overload protection, company officials added.
“As colder weather approaches, maintaining reliable aircraft operations becomes increasingly important,” said JJ Frigge, president of Hartzell Propeller. “This new Tanis system gives TBM owners and operators a comprehensive preheat solution designed to support easier cold-weather starts, while providing protection and supporting reliability of critical aircraft systems. Beyond the operational benefits, it also creates a more comfortable experience for passengers by allowing the aircraft to be warm and ready before they ever step on board.”
The Tanis TBM system is available in both North American voltage (115V) and European voltage (230V).
For more information: HartzellPreheat.com/Tanis


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