If you had read to the end you would have found your answer(s). Work is in progress: but as airliners are designed for a working life of at least 30 years it wi

If you had read to the end you would have found your answer(s). Work is in progress: but as airliners are designed for a working life of at least 30 years it will take a while yet before the lessons of MH370 are universally adopted.