What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO BNA DUE TO THE FLIGHT CREW REPORTING THAT WHILE CLIMBING THERE WAS A SHARP JOLT FOLLOWED BY SEVERE LONG PERIOD VIBRATION. INITIAL JOLT YAWED AIRPLANE TO THE LEFT ABOUT 5 DEGREES. SEVERE VIBRATION LASTED ABOUT 20-30 SECONDS. FLIGHT ATTENDANTS IMMEDIATELY CALLED AND REPORTED SEVERE ENGINE VIBRATION AND SECURED CARTS AND THEMSELVES. **SUPPLEMENTAL REPORT FOR AALA202408232510: MAINTENANCE ACCOMPLISHED TASK CARD 26L00005067 AIRFRAME VIBRATION TROUBLESHOOTING WITH NO DEFECTS NOTED. MAINTENANCE DID NOT IDENTIFY A SPECIFIC PART THAT WOULD HAVE CAUSED THIS EVENT.** (CLOSED)