Graeme,
Welcome to the site.
Below is what I have on c/n 1006. If you were doing a uranium survey in 1967 I'm sure you can make some corrections in my info. I have it being sold by Maurice Air Transport in '67 to unknow person then sold to Paul Collard who sold in 1974.
Were you using a scintillating device on the survey?
Maybe you can eliminate some of the other ? marks.
I have one picture do you know anything about it or the person in it?
I would like to see your pictures hope my picture isn't one of yours.
C-FNNB c/n 1006, built 06/61, model H-395A, factory sold St Maurice Air Transport co ltd MA, export as CF-NNB St Maurice Air Transport co ltd QC returned to Factory 11/63, rereg N8754R Helio Aircraft corp (Factory) export 05/66, rereg CF-NNB St Maurice Air Transport co ltd QC sold '67, ? '74, rereg C-FNNB Paul Collard sold '?, accident very hard landing unknown place and time, canceled reg ?, Apco Holdings Canmore AB sold '09, currently on floats in process of being repaired, rereg 07/12 Michael Witherell Sudbury, Ontario
Doug