The pilot of a helicopter that crashed on a remote Hawaii lava field during a sunset tour in June told investigators that the engine had been swapped out but three earlier flights that day were normal. The National Transportation Safety Board released various documents related to the crash that injured all six people on board, but still no word on a probable cause. The helicopter crashed and was found lying on its left side with significant damage to the cockpit and the tail boom was nearly 800 feet from the main wreckage, according to reports. A large piece of lava rock penetrated about 13 inches into the cockpit area.