The prototype of the new Brazillian KC-390 military transport aircraft skidded into the mud during a ground test at Gavião Peixoto Airport, said Plano Brasil.

On 5 May, the Embraer KC-390 aircraft prototype suffered a runway excursion during a ground test at Gavião Peixoto Airport, Brazil.

According to the Plano Brasil, the prototype 001 was performing a ground-level test in the town of Gavião Peixoto in Sao Paulo state. During the test military transport aircraft went off the runway, no crew members were injured.

More: Brazilian Air Force to receive first two KC-390 aircraft this year

Embraer has already recorded one other incident in October that damaged the prototype, putting it out of service until January. The planemaker said that incident would not affect the certification schedule of the KC-390, which is slated to enter service with the Brazilian Air Force in 2018.

More: Brazil’s Air Force to get first KC-390 multi-mission transport aircraft in 2018

The Embraer KC-390 is a tactical airlifter presently under development in Brazil.  According to the company, the KC-390 is a new generation multimission aircraft which combines a highly flexible platform with the lowest life cycle cost in the medium airlift market.