Complex sentence: A week later, he decided to ignore more experienced pilots' advice against flying through a thunderstorm, and later noted that he had been "lucky to get through the weather", and vowed never again to fly in such conditions unless ordered to do so.
Split into simpler sentences: A week later, he decided to ignore more experienced pilots' advice against flying through a thunderstorm. He later noted that he had been "lucky to get through the weather", and vowed never again to fly in such conditions unless ordered to do so.