Old May 20, 19, 9:58 pm
  #6  
shd9
 
Join Date: May 2015
Location: ORD, SZX, HKG
Programs: AA EXP, CX GR, AS MVP GLD
Posts: 506
First and foremost, DON'T ACCEPT THE DOWNGRADE!

When there is an aircraft change, sometimes your reserved seats will be lost, and if subsequently more people selected seats, there could no seats for you to select. But your reservation is still intact and AA is obligated to deliver you to your destination in J.

In your case, it appears that seats 4AB are blocked, so they will be unlocked some time between T-24 hours and T-1hours gate control. If it was not unblocked when you check in DTW, you will be issued a Priority Verfication Card for your PHL-EDI segment, when you get to PHL, go to the gate and talk to the gate agent.
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