No mission was flown - a technical expert insisted that all the engines on one aircraft be changed.

The engines were changed in two minutes but a station official kept the train waiting another 8 minutes.

If necessary the engines could be changed on the pad.

The engine was changed from white metal bearings to shell bearings.

The first aircraft's engine was later changed to an Atsuta 32.

The engine was entirely changed for 1963, though the displacement and output remained the same.

Before the race the gearbox and engine were changed due to not being able to select first gear.

The engine mount and brace were also changed in late 1989, with the exact date not known as of this writing.

This meant that if the engines were not changed, they would be too close to the ground.

More ominous was the fact that the engines had already been changed twice.