Good News for all Samsung Galaxy Tab 3 10.1 (santos103g/santos10lte/santos10wifi) owners. Now you can install the latest Lineage OS 14.1 on Galaxy Tab 3 10.1 based on Android 7.1.2 Nougat. Lineage OS is a new Open Source project morphed after the death of CyanogenMod OS. However, the man behind the LineageOS seems to be the CEO of Cyanogen.inc Steve Kondik. Today you can enjoy the build of Lineage OS 14.1 on Galaxy Tab 3 10.1 (CM14.1 base ROM). Check the full differences between Stock and Custom ROM here.
Remember this is a stable build of Lineage OS 14.1 on Galaxy Tab 3 10.1. This is a Stable build and can be used as a daily drive. If you want to try LineageOS then head down to the below guide or steps on How to Install Lineage OS 14.1 on Galaxy Tab 3 10.1.
With the new LineageOS, you can enjoy the latest features which comes with Android Nougat as well as LineageOS features. This is not an official LineageOS ROM built for Galaxy Tab 3 10.1, but you can enjoy the real feature made from the LineageOS gerrit. The ROM is Stable state and can use as a daily driver. Now Download the Android 7.1.2 Nougat Lineage OS 14.1 for Galaxy Tab 3 10.1. You need a Custom Recovery like TWRP to Install Lineage OS 14.1 on Galaxy Tab 3 10.1.

Hello,
the latest lineage-14.1-20181007-UNOFFICIAL-santos10wifi.zip and open_gapps-x86-7.1-pico-20190302.zip
do n o t work, even after a clean install.
After rebooting there is a continous message that Google play services have been shut down.
Same with lineage-14.1-20180422-UNOFFICIAL-santos10wifi.zip
Only downgrade to cm-13.1-20160727-UNOFFICIAL-santos10wifi.zip and open_gapps-x86-6.0-nano-20190302 works.
Any help would be welcome,
best regards