Upvote:1
A metal PC case is going to be almost transparent to an airport x-ray machine. In the era when you didn't have to to take your laptop out, I often travelled with two or three in my hand-luggage and only rarely got asked to remove them to be separately screened.
The only problem is likely to be the PSU. If you can remove that and pack it separately or take in hand luggage, I'd say you had a better chance of the bag containing the PC case not being opened.
TSA are reported to hand screen a lot of checked-baggage, so irrespective of the contents you have a fair chance of it being opened anyway.
If you have connecting flights in other countries you can expect they have their own due diligence and will x-ray and may inspect your luggage if they evaluate that the item is a potential risk.
If you're originating in the US, I would not assume anyone will make any attempt to contact you in case they wish to examine your luggage.
I have to say this answer is mainly opinion rather than statements of fact (but was too long for a comment!)
Upvote:1
There's not a very reliable answer to this question. If TSA has statistics for "how likely is it that my bag will be hand searched?", or "what is the best way to avoid a security check of my bag?", I suspect it does not disclose them. If you want a guarantee that your packaged goods will be undisturbed, this kind of public air carriage is not the solution.
A few years ago, I had an oversized and substantially overweight laptop computer from my workplace that I was hoping to lose, so I often put it in my checked luggage. I would estimate TSA searched my bags (and upset the packaging) about a quarter of the time, which seems to me very high. Without the laptop I don't recall ever having a manual bag search by TSA. But that is a plastic laptop with a big lithium ion battery, not the same as a metal ATX-sized computer.
To my knowledge bags will not be screened more than once at connection points inside the USA, outside of unusual circumstances.
Upvote:3
There is a very strong possibility that the combination of the large metal case and the outer container being securely taped shut will generate interest from the TSA inspector. You would do well to pack it in a fashion that allows it to be easily opened and closed (ie: no tape).
I travel occasionally with large plastic totes and use nylon compression straps to secure the lid. I will wrap the straps so that the buckles are on top and then wrap duct tape around the four sides, so that the straps stay attached to the bottom of the tote when they are undone. TSA has always reattached them and cinched them secure when they have inspected the contents (which is frequent since I often carry odd shaped metal bike parts & tools in the totes).
Ultimately the decision to inspect or not is a judgement call by the individual TSA agent handling your bag. There is no way for anyone (even other TSA agents) to know with any certainty if your bag will be opened or not, so best to be prepared for that possibility
ps: Murphy's Law says that if you don't want it opened, it will be opened.