Each country’s account of the final minutes of KAL007 differ significantly.
The US version has a SU-15 Soviet interceptor trailing KAL007 for 20 minutes, firing the missile at 18:26:20 with the Soviet pilot reporting the target is destroyed 2 seconds later. The the plane looses altitude and is lost from radar at 18:38
The Japanese version states a Mig-23 crossed the path of KAL007 briefly and shot the missile at 18:25. It suddenly disappears from radar at 18:29 and appeared to explode in the sky.
The Russian version states the unknown Intruder was shot down at 18:24 over the village of Pravda. Both missiles fired hit the target with the first hitting the tail and the second removing half the left wing.