Complex sentence: One of the first aircraft owned by her De Havilland DH.60X Cirrus II registered G-EBZG in 1928: it was damaged on landing at Shoreham; sold to Southern Aircraft Ltd and rebuilt.
Split into simpler sentences: One of the first aircraft she owned was a De Havilland DH.60X Cirrus II, registered G-EBZG, in 1928. It was damaged on landing at Shoreham, sold to Southern Aircraft Ltd, and rebuilt.