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Piper announces historic fleet deal, diesel Seminole

Largest domestic trainer order Piper has taken

Editor's note: This story was updated July 23 to include additional information.
Piper Aircraft and the University of North Dakota’s (UND) John D. Odegard School of Aerospace Sciences announced July 22 at EAA AirVenture Oshkosh in Wisconsin a record-breaking deal for the delivery of up to 188 Piper Archer TXs and Seminoles. 
The DeltaHawk DHK4A180 engine is now available for retrofit on Piper Seminoles and will become a factory option beginning with the 2027 model year. Photo by David Tulis.

The deal, valued at around $155 million, marks the largest domestic trainer order in Piper’s history. The contract will initially include 145 aircraft deliveries over eight years beginning in 2027, with an optional two-year extension for up to 188 aircraft by 2036.

UND operated a fleet of 75 Cessna 172 Skyhawks in 2015 that the school began replacing under a 2016 contract with Piper for 112 aircraft. That deal is scheduled to be completed in 2026.

Piper also announced its new Piper Seminole DX, a diesel-powered PA–44 Seminole that features DeltaHawk’s DHK4A180 180-horsepower, heavy fuel, compression ignition engine. The DHK4A180 engine promises 40-percent better fuel efficiency, improved performance, and lower maintenance costs due to fewer moving parts. Piper began taking position reservations for the Seminole DX engine retrofit kit (including a Piper-owned supplemental type certificate) at the start of AirVenture. The company expects to offer it as a factory-fit option beginning with the 2027 model year, pending FAA certification of the type certificate.

Including the extension, the UND order is equivalent to almost a full year’s worth of Piper’s production for the Archer and Seminole. Piper shipped 182 Archer and Pilot 100i—a three seat, Garmin G3X Touch trainer on the same airframe as the Archer—units and 26 Piper Seminoles in 2024, according to the General Aviation Manufacturers Association.

The deal solidifies recent success for Piper, with the company reporting in 2024 the highest unit volume since 2001.

Ian Wilder
Ian Wilder
Editor
Ian Wilder is a private pilot and remote pilot who joined AOPA in 2025 after receiving a bachelor's degree from the University of Wisconsin-Madison, where he majored in journalism and political science.
Topics: Multiengine Piston, Single-Engine Piston, EAA AirVenture

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