On Apr 1, 3:59 am, "Mike Isaksen" wrote:
wrote ...

Take a look at these photos let me know what you think? Note only 43
hours on bird found when diagnosing the CHT probe failure. MT Prop On
SMA diesel.

http://www.internationalferryflights...l/PIC-0078.jpg

http://www.internationalferryflights...l/PIC-0079.jpg

What's your issue? The only thing that jumps at me is the cowling rub on the
prop hub extender. Could be the cowling or the engine mount is shifting in
flight at different rates. I would go back to the airframe
engineer/designer.

The Gouges in the prop hub are deep!

Interesting that they say "Damage" is not a problem?

From SMA,

I confirm that this damage is probably due to a contact with the lower
cowling (there should be a mark on the cowling).
The cowlings have a tendency to drift upwards during flight and come
into contact with the propeller hub because of soft shock mounts.
We are currently certifying new shock mounts that will be less
flexible and less sensitive to aerodynamic efforts submitted to the
cowlings.
As specified by MTPropeller, the damage is not a problem.
Best regards,

Cyrille DEAU
SMA (Société de Motorisations Aéronautiques)
SAFRAN GROUP
Customer Services
Tél. +33 (0)2 48 48 05 31
Fax +33 (0)2 48 50 01 41
SMA Bourges- Aéroport
10-12 rue Didier Daurat
F- 18000 BOURGES