The phrase "fatal defect" is correct and usable in written English.
It is a phrase used to express a serious flaw or defect that is fundamental and likely to be unrepairable or irreparable, either physically or ethically. For example, "The aircraft had a fatal defect that caused it to crash."
Like Karen, I found out that the child I was carrying had a fatal defect.
In 1996 he and his wife were told that their unborn child had a fatal defect.
This discovery led to the development of a surgical procedure to correct the formerly fatal defect.
Its heart defibrillators had a potentially fatal defect that it did not reveal to patients or doctors.
The New York law says that failure to adhere to the election timeline shall be a fatal defect, but the New Jersey statute does not say that".
They felt strongly that if we could screen their embryos to avoid this, it was far more acceptable than aborting a fetus with a fatal defect.
There have been novels about working-class life in England before, but they were almost always flawed by fatal defects….
The judges variously described the case of the tobacco companies as "delusive", "synthetic", "unreal", and suffering "fatal" defects in logic and reasoning.
In the highly stressed regions the detwinning process produces a twin free microstructure, allowing for subsequent extrusion and crack formation, and introduces fatal defects into structural parts.
Cracks are fatal defects of ceramic coatings for carbon/carbon (C/C) composites, through which oxygen will severely destroy the substrate at ultra-high temperature environments.
For example, Toyota Motor, which has come under scrutiny over its slow handling of fatal defects in its vehicles, does not have a single external member on its board.
