The phrase "a fault in a" is correct and usable in written English.
It can be used when discussing an error or defect within a specific context, such as a system, process, or object.
Example: "There seems to be a fault in a critical component of the machinery that needs immediate attention."
Alternatives: "an error in a" or "a defect in a".
Researchers on the project compared DNA from the girls and their parents to find that each child had a fault in a single gene.
The worst you can say about young Doig is that he does not take himself seriously enough – hardly a fault in a young artist.
France's aviation safety agency, BEA, has stated that the aircraft had transmitted messages showing smoke inside the cabin and a fault in a flight control unit before crashing.
A fault tolerant MPC scheme is then developed based on the recursive algorithm, whose effectiveness is demonstrated on tolerating a fault in a steer-by-wire actuator.
Television footage showed people carrying the injured on stretchers as organisers of the rally for the pro-Kurdish HDP announced on loudspeakers that the explosion had been caused by a fault in a power generator.
Catalonia's interior minister, Joan Boada, said the power cuts, caused by a fault in a high-tension cable, were affecting the area around Girona, 60 miles north of Barcelona.
Upon inception of a fault in an individual macrogrid, it would be disconnected from the utility grid and operates in an autonomous mode.
Three factors should be considered while developing a technique to identify a fault in an LVDC distribution system.
We, however, note one important difference between a single degree of freedom system and a fault in an elastic continuum.
A road in St Peter Port will be closed until Monday as crews continue to fix a fault in an electricity cable, the States said.
The 22 Eurocopter EC 135s, including 16 air ambulances across the UK, were suspended as a precaution by operator Bond Air Services following the discovery of a fault in an air ambulance in Scotland last month.
