As I said in my previous post,they ultrasonic test the tub for hidden damage such as delamination etc.
satos... I ask again, how do they KNOW to do the ultrasound? Presumably because telemetry and the driver and the wreck say "we crashed it".
Translate that to a 787. How does one KNOW to ultrasound it? Unless the structure shows visible damage when it is whacked, which as you say composites do not, yet are damaged internally, then the engineer / pilot does not know... The person causing the (possible) damage will not, in general, say a thing
