FAA certifies Mammoth’s 777-200LR ‘Big Twin’ freighter conversion
April 9, 2026
Mammoth Freighters has received Federal Aviation Administration (FAA) certification for its 777-200LRMF passenger-to-freighter (P2F) conversion, clearing the aircraft for commercial service.
The approval validates the aircraft’s design, engineering, and performance, and Mammoth said it marked a “major milestone in the company’s expansion of next-generation widebody freighter solutions”.
Who will operate the first 777-200LRMF?
The Long Range Mammoth Freighter (LRMF) has Jetran, a Texas-based aircraft lessor, as its launch customer, with Qatar Airways Cargo the first end user.
The 777-200LRMF performed its first test flight last year but had been awaiting FAA certification until now.
Qatar Airways Cargo has an agreement with Jetran for five aircraft. DHL and Ethiopian Airlines are also due to take delivery of the aircraft in the future.
“As the launch customer for the 777-200LRMF, this milestone marks an important moment for both Mammoth Freighters and Jetran,” said Jordan Jaffe, CEO, Jetran. “From the outset, we have had strong confidence in the Mammoth engineering team and their vision for the programme.
“The aircraft’s quality and technical execution have met our high expectations and reflect the strength of the underlying design. We believe the Mammoth conversion will be a competitive and compelling option in the long-haul freighter market and will deliver solid value for Jetran’s customers including DHL, Qatar Airways and Ethiopian Airlines.”
The ‘Big Twin’ freighter: Designed for payload and parts commonality
Key features include a large main-deck cargo door, a reinforced floor structure and an advanced, flexible cargo handling system.
The Mammoth converted B777-200LR freighter promises similar characteristics and benefits as the production freighter, with a payload capacity of 102 tons and a range of 9,200 kilometres.
The 777-200LRMF features Collins Aerospace’s cargo loading system, which has been optimised for the 777 passenger-to-freighter market.
The system was developed over three years and ensures parts commonality with 777 production freighters in service.
Mammoth has seven 777-200/-300 aircraft undergoing conversion: five at Aspire MRO in Fort Worth, Texas, and two at STS Aviation Services in Manchester, UK.
The company holds firm orders for 35 freighter conversions.
“This certification reflects years of disciplined engineering, close collaboration with the FAA, and the dedication of our entire team and partners,” said Bill Tarpley, Chief Executive Officer of Mammoth Freighters.
“Approval of the 777-200LRMF underscores the strength of our technical approach and our ability to deliver a high-performance freighter that meets the evolving demands of cargo operators worldwide.”
Deliveries set to begin in 2026
Mammoth is now set to begin aircraft deliveries and entry into service for the -200 variant.
It is also making progress on its 777-300ERMF programme, for which it expects FAA certification later this year.
It comes after Israel Aerospace Industries (IAI) became the first company in the world to complete a P2F conversion of the larger -300ER, classified as the Boeing 777-300ERSF.
The milestone was confirmed last September, with certification from both the US Federal Aviation Administration(FAA) and the Civil Aviation Authority of Israel (CAAI).
The converted aircraft can carry up to 100 tonnes of freight, making it one of the largest commercial freighters currently available.
Dublin-based AerCap is the launch customer for that aircraft, with US cargo carrier Kalitta confirmed as the first operator.
IAI is the first company to complete a passenger-to-freighter (P2F) conversion of the Boeing 777, the world’s largest twin-engine jet.
Until now, 777 freighters in service have all been factory-built by Boeing.
Featured image: Qatar Cargo
