Question 1

Why is the Diamond DA42 the dominant multi-engine trainer at European ATOs?

Accepted Answer

The DA42 was the first all-new Jet-A piston twin to reach production and arrived as European integrated ATOs were modernising their multi-engine training fleets. Twin Austro AE 300 diesel engines burn the same Jet-A as the school's turbine fleet, FADEC single-lever engine control simplifies engine handling for ab-initio multi-engine students, and standard Garmin G1000 NXi glass with a GFC 700 autopilot matches the cockpit environment of the IFR-rating block. CAE, Lufthansa Aviation Training, L3Harris Flight Academy, FTE Jerez, and Skyborne all run DA42-VI fleets for their multi-engine and IFR syllabi.

Question 2

What is the difference between a DA42 TDI, DA42 NG, and DA42-VI?

Accepted Answer

All three share the same airframe but differ on engines and avionics generation. The DA42 TDI (2004–2008) used twin Thielert Centurion 1.7 / 2.0 diesel engines; Thielert's 2008 insolvency forced many operators to convert to Austro power. The DA42 NG (2009–2012) was the first variant powered by the Austro Engine AE 300, the 2.0-litre Mercedes-Benz-derived diesel that remains in production today. The DA42-VI (2012–present) is the current production variant with aerodynamic refinements, increased MTOW, and Garmin G1000 NXi as standard.

Question 3

Is the Diamond DA42 a complex aircraft?

Accepted Answer

Yes. The DA42 has retractable gear and constant-speed propellers via FADEC, both of which qualify it as a complex aircraft under FAR 61.31. Schools commonly use the type for the multi-engine, IFR, and complex portions of the commercial syllabus in a single airframe rather than transitioning students between separate platforms for each rating.

Question 4

How much does it cost to operate a Diamond DA42?

Accepted Answer

Hourly direct operating cost typically lands between $230 and $360 per hour for a DA42-VI burning Jet-A at roughly 13 gph total across both Austro AE 300 engines, including fuel and engine and propeller overhaul reserves but excluding hangar, insurance, capital cost, and instructor. Wet rental rates at European and US ATOs generally fall between $380 and $595 per dual hour. The Jet-A fuel burn is one of the lowest of any modern multi-engine trainer; integrated programmes block-bill the ME/IR syllabus rather than charging by the wet hour, which makes head-to-head comparison difficult.

Question 5

Does the DA42 burn 100LL or Jet-A?

Accepted Answer

Jet-A. The current DA42-VI uses two Austro Engine AE 300 diesel piston engines, each rated at 168 hp on Jet-A or compatible jet fuels. This insulates the type from the US 100LL-to-unleaded transition (FAA EAGLE, CARB UNL94) and aligns the multi-engine training fleet with the school's turbine fuel logistics.

Question 6

What is the Austro AE 300 engine's TBO?

Accepted Answer

The Austro Engine AE 300 has an EASA-approved time between replacement (TBR) of 2,000 hours and a published time between overhaul (TBO) of 1,800 hours per Austro Engine SI ASA-25. The engine is supported directly by Austro Engine in Wiener Neustadt, Austria with a global authorised service network.

DA42 Twin Star

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