NEW : Dana Airlines says it 's `` cooperating fully with investigating authorities '' Joy wife , David Chukwunonso Allison 's , died in the plane crash about a year in U.S. . They had a 1-year-old daughter . His lawsuit alleges the plane and its engines were defective . Before the crash , the pilot had issued a mayday saying both engines had failed .
NEW : Dana Airlines says it 's `` cooperating fully with investigating authorities '' Joy wife , David Chukwunonso Allison 's , died in the plane crash about a year in U.S. . His lawsuit alleges the plane and its engines were defective . Before the crash , the pilot had issued a mayday saying both engines had failed .