Like RSWoodly I started out with something rubbing the squirrel cage fan. After disassemble I discover pieces of bark had somehow gotten past the cabin filter. The timing was most fortuitous as I discover the hold down clip had the infamous broken tab. This has to be the weakest link of any 129

I also had a strange part (see pic) in the bay outboard the passenger fan. It just could not have fallen in and I have no idea where it goes. The P/N 129 831 00 27. Anyone have a P/L up and running and could shed light on this part would be greatly appreciated.

Thanks to board members for saving me $$.

J$