Analysis of information sources in references of the Wikipedia article "Voo United Airlines 232" in Portuguese language version.
TITANIUM CLEANLINESS: ... (Sioux City crash) As a consequence, triple melt VAR was adopted by the industry asa premium (rotor) grade requirement
TITANIUM CLEANLINESS: ... (Sioux City crash) As a consequence, triple melt VAR was adopted by the industry asa premium (rotor) grade requirement