n the civilian world .....what is required is a full power run to ensure all parameters EPR/N1 ,EGT ,vib levels etc etc are all within the normal limits
Though in the UK it would appear that no full power engine runs are required...
From
AAIB report
After the passengers had disembarked, an engineer
boarded the aircraft and informed the flight crew that
the replacement left engine had not been subjected to
hgh-power ground runs because it had been suppled
“pre-tested”.