So here the story of chewbacca death
"In 1999, the New Jedi Order miltibook story arc began, and from the outset with R.A. Salvatore's Vector Prime, it promised to be an Expanded Universe story line unlike any other.
The Yuuzhan Vong, an alien incasion force a generation in the making, lauched its intial strike in the Outer Rim, crashing a moon, Dobido, into the heavily populated planet, Sernpidal. Han Solo, Chewbacca and Anakin Solo would find themselves engaging in rescue operations, attempting to evacuate as many sentients as time permitted. However, under the strain of severe graviational forces and trapped olanetside with Anakin, Chewbacca would use hi strength to hurl Anakin, onto the Millennium Falcon, saving the son of his dearest friend. Raging against the crash of Dobido, it would take the annihilation of a planet to defeat the mighty Chewbacca. A life debt fulfiled. A friendship for life ended. The death of Chewbacca, for the first time, brought irreparble tragedy to the Heroes of Yavin, and from this point forward, no one would ever be safe again." Taken from 'Star Wars' magazine