American Airlines was able to quickly fix it by supplying the right chart outside of the program, on the iPad itself ... until the App is fixed! No big deal ... and they were back in the skies in no time ... :-) ...
There was NO ISSUE with the iPad!
I see. Except the App runs on an Apple which is built to have Apps update when the App manufacturer decides to do one without any approval or oversight from the FAA. So yeah Apple's design and App system grounded several dozen flights because of a glitch. Sorry but thems the facts AND it would be no different if it was anyone else's system besides Apple like a Surface for instance.
Its a Consumer good that has been approved for the role of flight manual in a Government controlled system OK yeah good show and all that BUT the APP can be updated AND/or the unit itself can be updated without FAA approval and as such the system can get FUBARed and ground planes because of FAA rules.
If it can happen once it can happen twice. And don't give me this "it isn't Apple" crap they have had system wide FUBARs before the most memorable was Apple Maps which was so bad they fired the guy in charge.
Now as I stated very far upthread the answer is very simple either new rules that stop the updates of apps and the OS on the Units used in plans until the FAA approves them or carry a backup of some sort so that planes don't get grounded from a single point of failure.
Anyone with an IQ in the double digits can see that as the system stands now many more planes can be grounded and disrupt flights en masse with how it is now.
Bottom line iPads glitched and planes were grounded and unless those planes were all empty then literally thousands of passengers were affected. The system needs changed to stop it from happening again.