ST - I think this incident happened around'74/75. I had the first Hyd fail on the Puma soon after starting 230 with the brand new a/c (and 222 vibrated even then) - night in the cct, gear down - big bang and captions everywhere. Pulled the emerg handle up which stopped the leak, and got the AP back. Refuel in the hover while sandbags were found. Eventually landed on to find the nose jack had split it's end of. A restrictor was fitted later! Strewth - 35 years ago!