Evidence of widespread fuselage cracks and fatigue were found on a Southwest Airlines jet that made an emergency landing in Arizona with a hole in the cabin, a US safety investigator said.
After inspection of all the airline's older model 737-300s, small subsurface fuselage cracks were also found on two Boeings, which may require repairs, Southwest said on Monday.
Al Jazeera's Rosiland Jordan reports.
