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Old 26th Sep 2018, 03:54
  #23 (permalink)  
Four Wings
 
Join Date: Sep 2005
Location: England
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I wonder if the CAA has established a connection with the valve seat recession associated with the absence of tetra ethyl lead in automotive fuels.

Digging back into the distant memories of my refuelling days, didn't Rapides run on unleaded 80/87 and Herons on 100/130? Given Rapides were 1930s aircraft I'm not even sure TEL had been brought in then.

Or am I dreaming?
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