For a satellite in a stable GEO orbit, I think there are basically two possibilities: 1. Collision with other debris 2. Internal fault causing uncontrolled re

For a satellite in a stable GEO orbit, I think there are basically two possibilities: 1. Collision with other debris 2. Internal fault causing uncontrolled release of stored energy (i.e., explosion) Intelsat-29e used the same satellite bus and experienced #2, in the form of some sort of uncontrolled propellant release.