The broken violin

We all know that a violin is used to make sounds; at least since the great lutist in Cremona Stradivari and great genoan player Paganini have showed the world how enjoyble is to hear its music. They must be tossing and turning in their graves, knowing the way British Airways treats musicians and their instruments. 
As matter of fact, like reported by her friend Sara Avery,  B.A. forced a violin player flying for concerts with the above named flying company,  to check her violin. (Their policy doesn't allow instruments over 56 cm/22 in in length on board. Her only choices were to check it, leave it behind despite needing it for practicing + getting routine maintenance in the US, or forfeit a $3,000 plane ticket and perhaps her last chance to visit her elderly mother.)
2. They smashed it to bits.
3. They are paying her less than 1/4 of the appraised replacement value.
Until #BritishAirways changes their policy, it is not safe for musicians to fly BA with their instruments.
As a lawyer I'm not so sure that the way B.A. has behaved is utterly correct!
At least, according to italian law, the story shows a negligent and faulty behaviour to be blamed on charge of the international flying vector, though is reported that British Airways employees have made up their decisions against the safety of the Sara's friend's violin, obeyng, it's reported,  to their own regulation.
Nevertheless I would listen to a specialized lawyer, in order to find out if such rules, as those applied by B.A.,  are in line with good faith and right care which are required to any contractor all over in the world.