[PSUBS-MAILIST] G.L. summary Pressure Hull
    Joe Perkel 
    josephperkel at yahoo.com
       
    Wed Dec 11 09:53:47 EST 2013
    
    
  
Alan<br/><br/>No definitive answer but we can postulate that both sensing and actuation are involved. <br/><br/>On sensing, differential pressure on either side of the hatch is translated to a impulse to actuation.<br/><br/>On actuation, a method of locking out the operator from physically un-dogging the hatch, is the only way to meet the standard as per your O.P.<br/><br/>Joe<a href="http://overview.mail.yahoo.com?.src=iOS"><br/><br/>Sent from Yahoo Mail for iPad</a>
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