Learjet 60 engine failure before takeoff (KSMO)

While spotting at SMO this Learjet had a technical issue and decided not to take off. It is unknown what the exact problem was, however I slowed the video where there is a visible flashing orange glow in the left engine while the plane was sitting on the taxiway. As this is probably not uncommon, it seems abnormal to see this flashing in the daylight on a modern jet engine.