Complex sentence: However, it was damaged in an accident at Liverpool Speke Airport that autumn in which the pilot Tom Campbell Black was fatally injured during preparation for its entry with "ZS-AHM" and "ZS-AHO" in the infamous Schlesinger African Air Race.
Split into simpler sentences: However, it was damaged in a fatal accident at Liverpool Speke Airport that autumn, killing pilot Tom Campbell Black. This was in preparation for its entry with "ZS-AHM" and "ZS-AHO" in the Schlesinger African Air Race.