"mechanical error" is a correct and usable phrase in written English.
You can use it to describe a problem caused by a machine. For example, "The computer crashed due to a mechanical error."
Had it been a mechanical error?
"It looks like it will have been down to both human and mechanical error.
A county lawyer blamed a "mechanical error" for the bad diagnosis.
They said the new system encountered problems like vague mechanical error messages and power cables vulnerable to tampering.
They are also so prone to mechanical error and breakdown that there is no way to be sure that the totals they report are correct.
The former staff member said mechanical error also played a role as sensors are supposed to prevent two cars from entering the same section of track.
As the temperature varies over time and the moving parts are heavy, the thermal and mechanical errors exist a strong coupling effect, making the thermal deformation mechanism more complicated and the optimization of the structural design more difficult.
Those include human or mechanical errors and even sabotage by contaminated jet fuel.
The rig's history of mechanical errors was documented in a confidential audit conducted by BP seven months before the explosion and reviewed by The New York Times.
In the days after Tuesday's crashes, officials discounted the possibility of terrorism, offering myriad, often contradictory statements suggesting that human or mechanical errors were the cause, despite the coincidence of simultaneous air disasters.
The new reactor's simplified design also means that fewer motors, pumps and pipes are needed, reducing not only the potential for mechanical errors, but also costs of maintenance, inspections and repairs.
