Object or objects reviewed were not of earth

When asked about spacecraft and aliens in 1980s in private conversation, Dad divulged information and had since retired in 1970s. During the alleged incident he was an Electronics Technician in US military and was given Yankee White clearance and asked to examine components of a craft that were not of earth. It was determined that the information in components held an electronic design never seen in his training and experience with aircraft and within the component a pin point of data was stored and that the knowledge of science of the time could not fathom this understanding in 100 years time. Was told by superiors to never share what happened or face imprisonment and has since deceased as of Feb 2023. When asked a few months before death again about aliens not of earth existing said YES to being real and was fearful at that time.