Mammoth 777-200LRMF is on its way to obtain FAA STC following the completion of its final flight tests.

Mammoth Freighters is in the final certification flight tests for its 777-200LRMF with the FAA, having started formal testing last week. VP Brian McCarthy reported smooth progress, with plans to submit all necessary documentation by month-end, which will initiate Type Inspection Authorization (TIA). The 777-200LR must receive its FAA Supplemental Type Certificate (STC) before the 300ER can be certified, with completion expected by year-end. The company has 35 firm orders, primarily from Jetran Ltd, and anticipates 300ER certification in the first quarter of 2026.