Complex sentence: The CVR coaxial spools were under tension during its' normal operating flight, when the tape was severed, the spool would have spun freely which resulted in the release of additional tape into the transport and crash areas.
Split into simpler sentences: The CVR coaxial spools were under tension during its' normal operating flight. When the tape was severed, the spool would have spun freely which resulted in the release of additional tape into the transport and crash areas.