The flaw may have been a one-off but we had a tremendous programme changing all of the Main Gearboxes on the 22 Sqdn Whirlwinds and keeping SAR operational at the same time. I was stationed at St Mawgan but found myself at Manston changing the last Gearbox when to our amazement a Victor bomber landed on a foam laid runway in our full view, the hatches were blown, possibly too late, and one landed on the port wing leading edge just where the wing profile altered. The aircraft was still there when we left.