74 V-22 Ospreys cleared after being grounded because of loose bolts

Seventy-four out of 84 V-22 Ospreys have been cleared to fly after loose bolts caused them to be grounded.

Officials say the grounding, which was ordered on Saturday, is a precautionary move.

Mechanics noticed the loose bolts after a pilot complained of vibrations and heard a loud noise after a routine flight in Iraq.

Four Ospreys operated out of Al Asad Air Base had loose bolts.