What was found
AIRCRAFT WAS GROUNDED: LIGHTNING STRIKE CLIMBING THROUGH 8000FT OUT OF BNA. LOUD BANG AND BRIGHT FLASH FOLLOWED BY SEVERAL MINUTES OF MINOR VIBRATION AND SECONDARY BANG WHICH LESSENED VIBRATION. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO TYS WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AIRCRAFT PER LIGHTNING STRIKE INSPECTION TASK CARD 26L00005001 AND NO DAMAGE WAS NOTED. ALL FUNCTIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.