They frequently are caught lying in their reports too. For example, a commercial aircraft flew into the ground. They were IMC with zero visibility. The co pilot, who was not pilot in command, was blamed as a contributing cause because he was color blind and therefore might not have been able to observe the airport beacon colors. Which is false as testing is required to confirm he can. But it was never a factor in the first place as there was ZERO visibility and the beacon was irrelevant and he wasn't flying. They frequently blame pilots for mechanical failure. Their position is, if you delay reporting people believe it means an exhaustive investigation is the cause. The FAA and NTSB reports frequently conflict.