I would have to assume that if even one piece of “surveillance” equipment was found Qatar would be fucked and the plane would not be accepted.
When I was with the AWACS program, all E-3 aircraft were parked in secure areas with armed guards. Nobody was allowed to enter the roped area without proper ID and authorization. "USE OF DEADLY FORCE" signs were posted on the perimeter. And, since the air field was almost always on a military facility, you had to have access to the base or field before you could even get close enough to get shot.
Since we are talking a 747, not all air fields and airports are able to accommodate them. The ones that can are also well guarded. Air travel both commercial and private are high priority assets when it comes to airport security.
That whole security envelope is the first line of defense for any 747, especially for high profile government officials and their families -- i.e. the current users of the Qatar aircraft. I'm sure no physical security measures are 100% foolproof, but it's not as if the 747 is sitting on a city street for anyone passing by to monkey with.
That means we have to be at least a little trusting of the people giving the 747 to the US in their protection of the plane and their own people.
I'm sure there is no way to calm EEF's fantasy fears. I mean the plane hasn't even been received and already he's having nightmares of spies planting listening devices that can somehow transmit data and conversations to someplace else while the aircraft is aloft and all without detection.
Anything EEF can imagine, the Air Force will have already thought of and then some. If they overlook something, heads will roll. That's why i'm sure there's no chance of anything being covertly installed and overlooked. As I said, I'd be more concerned with someone at Boeing trying to sabotage the Qatar 747 simply because they are being blasted for taking so long for the VC-25B delivery, and possibly because of their politics.