Due to the increasing size of the Chart Data (and more GPS approaches), in Release R-9.4.x upgrade, the Chart Data storage location was moved from the circuit board Memory Chip to the Compact Flash Card.
Jeppesen codes the Chart Data Location into the download. The customer needs to contact Jeppesen and advise them that his system has been updated to 9-4.x and Jeppesen will modify his Chart Data accordingly.