On several occasions I have down loaded the charts in the AIP. When planning the trip they are in the memory. After shutting down the iPad and restarting for the trip the AIP charts have disappeared. Have I some incorrect settings?

I can second that. Had the same issue with the offline accessible german AIP. During a trip we had to alternate due to weather conditions, and I couldn't access the plate needed. Asus HD7Android 4.2.2 SD 3.x

-mike