The symptoms are almost the same, irregardless of which version update your downloading for. At around 70 to 75% of the process, it stops with a message like "data is corrupted", followed by ps3 8002f997 screen that shows up. Repeating the process doesn't seem to bring any solution to it as the same ps3 error code 8002f997 problem keeps appearing all over again.

ps3 error code 8002f997: kick it back!

The ps3 error code 8002f997 problem, as you may well have guessed, signifies an XMB update error. Your present system may have suffered corruption of data during the update or installation phase, thereby causing this ps3 8002f997 error to happen. Getting back to the old update is not possible at this point since damage to your system was already done.