1. Associate Professor, Aviation Mechanical Engineering Dept., China Univ. of Science and Technology, Hsin-Chu 312, Taiwan, Republic of China (corresponding author).
2. Research Assistant, Aviation Mechanical Engineering Dept., China Univ. of Science and Technology, Hsin-Chu 312, Taiwan, Republic of China.
3. L. Constant Distinguished Professor, Aerospace Engineering Dept., Univ. of Kansas, Lawrence, KS 66045.
4. Director, Investigation Laboratory, Aviation Safety Council, Taipei County 231, Taiwan, Republic of China.