When we operating Daks in South Africa, United were flying punters from Joburg up to the game parks.
The parks were fairly short so the short takeoff was 30+ inhg on the brakes ( with stick held hard back
+ brake release, full power and go.
In the days before CRM
one day the sequence got out of phase ! The laddie applied full power before Sir released the brakes
Aircraft tail went up and both props hit the ground at full power.
Exactly as Chevvrons incident both props sheared off at the reduction gear to crankcase flange.
The right hand one went charging off into the bundu but the left hand one, like the Farnborough one came roaring into the cockpit.
The first blade to hit went through the small left hand crew door the second blade rotated in just forward and the 3rd blade actually came into the cockpit just forward the pilots seat back missing the capt, by fractions of an inch !! All blades remained attached to the reduction gear.