As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER A SMOOTH LANDING, THE A/C HIT AN ABNORMALLY LARGE WAVE, WHICH CAUSED THE A/C TO GET AIRBORNE THAN CAME DOWN HARD ON A SMALLER WAVE, WHICH RESULTED IN A LARGE JOLT TO THE A/C. IT WAS THEN NOTICED THAT THE LT ENGINE AND POWER LEVERS HAD SHIFTED FORWARD. IT WAS ALSO NOTICED THAT THE LT ENGINE HAD DROPPED A BIT.