Editing Blue Giant:Starship Attributes (section)

===Damage to Engines===

If a ship loses use of its Space Flight Drive but retains its Star Drive and Mass Thrust Drive, then travel inside a solar system becomes difficult. The Star Drive inertialess field generator and the Mass Thrust Drive can be tinkered with to provide level 5 space flight (MTD bonus applies), but this requires 1D6 hours and an engineering skill check. Of course it will require the same to change it back again, and the ship will have no Star Drive in the meantime.

If a ship loses its Star Drive but still has Level 4,5 or 6 Space Flight it is still possible to travel through interstellar space. It's just really, really slow.

If for some reason a ship loses the use of its Mass Thrust Drive but still has its Star Flight then it can use it’s Space Flight engine as the forward thrust. However, there is a speed penalty. Fusion drives will propel the ship at 1/30th of the listed Star Flight speed, Ion drives at 1/300th and Rockets at 1/3000th. The Anti-gravity, Inertialess and Subspace (Fields) components offers no advantage to Star Flight.