As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW FELT A SUDDEN YAW LEFT MOTION AT CRUISE FL310. THE AMOUNT OF DRAG WAS TOO MUCH TO MAINTAIN CRUISE SPEED. CREW DECLARED AN EMERGENCY AND ELECTED TO DIVERT TO LAX. UPON INSPECTION AFTER LANDING PANEL 414CB HAD SEPARATED HALFWAY CAUSING THE DRAG AND YAWING. PANEL WAS REMOVED PER THE JSX CDL AND SPEED TAPE APPLIED. PARTS HAVE BEEN ORDERED FOR PANEL REPLACEMENT.