.
Having trawled the list of early UK Alo's was able to identify Crewdson's ship as G-AWAP.
A summary of the
accident report reads:
"The report concludes that the accident was caused by the disengagement of the main rotor head retention bolt, with consequent detachment of the rotor, due to corrosion of the engaging threads between it and the mast.
Contributory factors were the application of a different aeronautical grease from the one specified for use during assembly of the rotor head, the presence of a sulphate contaminant from an unknown source, the omission of a main rotor head inspection which had become due 207 hours prior to the accident, low aircraft utilisation which resulted in long periods of time between successive inspections and an extension of the overhaul period of the main rotor mast assembly."
Pages 5-8 of the report offer a more detailed account of the various anomalies.
Sav