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Old 12-25-2017 | 10:51 AM
  #17832  
HighFlight
Gets Weekends Off
 
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Correct. 18,000 down, 10,000 on the way up. MSL. You know, because you can see that in the cockpit.

Originally Posted by KSCessnaDriver
Depends on the airline. OO chimes at FL180 on the way down, as best as I can tell...
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