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Old 4th Oct 2018, 04:37
  #57 (permalink)  
megan
 
Join Date: Mar 2005
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Something old is new again?

https://www.flightglobal.com/pdfarch...0-%202701.html

When leaded fuel was first introduced, associated valve problems using the aluminium bronze inserts then commonly used..

https://www.flightglobal.com/pdfarch...0-%201389.html
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