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Old Oct 29, 09, 11:18 am
  #7  
fairviewroad
 
Join Date: Apr 2003
Location: United States
Programs: UA, AA, DL, Amtrak
Posts: 4,643
Originally Posted by bitburgr View Post
irrop = irregular operations

It's when things don't go as scheduled due to maintenance or weather issues.
Do maintenance problems count? I've always thought of "Irrops" as referring to widespread problems...a blizzard, ATC issues, etc. An isolated mechanical delay/cancellation, while inconvenient, does not really strike me as rising to the level of "irrops". A single cancellation is much different than an entire hub suffering from 2+ hour delays (for example).
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