H-53 Lightning Strike
We had an brand spanking new MH-53E at Sikorsky sustain an in-flight lightning strike approximately 15 years ago. The lightning struck a main rotor blade, as evidenced by a burn spot (5 inches in diameter) on the skin. A second indication was noted at the current exit point on a tail rotor blade. The tail rotor blade’s composite material was blown apart at the trailing edge leaving a fan of composite hair like material blowing in the wind. Post strike, the helicopter received a thorough engineering inspection and investigation. This investigation revealed that most ferrous parts along the current path were magnetized and required degaussing. Burn spots were also noted along gaps between the cargo door, ramp and the airframe.
For the remainder of its service life this aircraft was known as Lightning Bolt and all subsequent aircraft problems were blamed on this early life event.