English
Русский
Mammoth Freighters now expects Supplemental Type Certification (STC) for its 777-200LRMF by the end of February.
Type Inspection Authorization (TIA) has been approved by the Federal Aviation Administration (FAA), the Fort Worth, Texas-based freighter conversion company told Air Cargo News.
This means that STC issuance for Mammoth’s 777-200LR should follow closely behind, said Brian McCarthy, vice president of marketing & sales for Mammoth.
“We are anticipating STC insurance by the end of the month or very close to it,” he said.
TIA is usually the last major step in the freighter conversion process before an STC is issued.
Mammoth said in December that FAA-witnessed final test flights would be carried out in early January ahead of and certification and delivery to launch customer Qatar Airways Cargo, which has an agreement for five of the aircraft with Texas-based lessor, Jetran.
The FAA has also been occupied with administrative work related to the 777-200LR, including audits of reports and data.
Mammoth has faced a substantial wait for the 777-200LRMF STC since it completed the initial test flight of the 777-200LRMF prototype in May 2025.
Qatar Airways Cargo had expected to receive the first and second aircraft during the fourth quarter, but the 43-day US government shutdown delayed the STC process.
Steady 777-300ER progress
Meanwhile, the build of Mammoth’s 777-300ER is steadily progressing and the STC could be ready by the end of this summer.
The build progress and test flight preparations look set to see the 777-300ER “STC achievable by the end of August”, stated McCarthy.
The first main cargo door installation on Mammoth’s 777-300ERMF took place in February 2025.
“Most of the major structure has been installed in the 300ER,” confirmed McCarthy.
He added: “Mammoths Design Approval organization (ODA) will be issuing that STC amendment as soon as all compliance, test results and data submittals are delivered and complete.”
There are currently three 777-300ER conversion programmes in place with IAI, KMC and Mammoth, in addition to the 777-200LR programme in development with Mammoth.