David,
Reading your notes regarding the fresh air vents on your 408, I have a similar problem on my 410 that the vents have also seized up in the closed position.
The photos you posted of the vents are Identical to the 410; did you manage to remove the flaps and associated mechanism and if you did remove the flaps, are you able to provide a little advice please, or did you carry out your repairs in situ?
As well as freeing the mechanism, I would like to replace the foam seal that’s attached to the inner face of the flap to prevent draughts.
If anyone else has removed these flaps to carry out repairs, their comments would be very much appreciated.
Regards
Brian
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