SpaceX has been haunted by a series of unfortunate static fire tests, beginning with the SN9 last month.
During a static fire test, the rocket ignites its engines at full throttle but remains firmly attached to the ground.
The SN9’s launch was delayed after a round of engine burns in a single day left the rocket in need of an engine swap.
At the time, SpaceX boss Elon Musk confirmed the news on Twitter, saying: “Two of the engines need slight repairs, so will be switched out.”
Another engine-related delay struck a month later after a static fire test of the SN10 prototype.
Once again, Mr Musk took to Twitter to tell his fans one of the Raptor engines was “suspect”.