How high do you fly

[pasir]

... For years had never gone above 3000' however on one trip that involved flying over mountain areas en route from UK to Frejus
(Cannes) - on the stretch from Marseilles it was necessary to climb
to over 9000' and although mid summer we soon after noticed what appeared to be either a light coating of dust - or otherwise the initial stages of icing beginning to form on the wing surfaces of our Cessna 172J. Any clues as to which it could have been ?


Incidentally when we landed at Frejus - that night our a/c was one of several that were lifted up. thrown around and severely damaged - as were several others - resulting from a sudden very high wind and storm that left the airfield with rainwater almost up to knee level - resulting in 4 weeks grounded and returning to the UK by train.

.....