Peter,

Sad. My condolences.

I'll speculatively ask the obvious, though, with the usual caveats of
not knowing the full story:

1.Passenger? On the first flight? Even if it's the guy you built it
with...
2. Turn back to the runway? I can sympathize, if you have spent years
building the plane, but still...

--
Thomas Borchert (EDDH)