Lessons from 1970 DC-9 ditching into Caribbean , 1996 crash off Comoro Islands . Title: Why do we have to wait for the sun to go down before it's dark? seat belt failure lead to new design ; jet did n't have enough life rafts . Passengers in 1996 crash inflated vests before getting out , were trapped . A320s have a `` ditching button '' to close valves , allowing jet to float longer .
Lessons from 1970 DC-9 ditching into Caribbean , 1996 crash off Comoro Islands . DC-9 seat belt failure lead to new design ; jet did n't have enough life rafts . Passengers in 1996 crash inflated vests before getting out , were trapped . A320s have a `` ditching button '' to close valves , allowing jet to float longer .