As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING T/C 78233008, FOUND INCORRECT LENS ON FWD AND AFT SIDE INSTALLED ON OVERWING EMERGENCY EXIT SIGN AT CENTER AISLE ON CEILING. GROUNDED - YES. REMOVED AND REPLACED FWD AND AFT LENSES ON CEILING OVERWING EXIT SIGN TO CORRECT PLACARDING LIGHT OPS CKS GOOD. REF B737-800 AMM33-51-01 LENS REPLACEMENT ONLY.