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Old 04-12-2009, 10:04 PM
  #4  
JT8D
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Joined APC: Oct 2005
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The ERJ is not certified for ETOPS. Not sure what you're getting at with the 90 minute rule but as a guideline we use 270NM to meet the 1 hour in still air requirement for a takeoff alternate. Service ceiling doesn't really play in until you start talking about driftdown performance which applies to engine failures in areas of high terrain.
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