What was found
EMERGENCY LIGHTS, CENTER ROWS 48 - 52. BOTH SIDES INOPERATIVE. FOUND ACTIVE FAULT 33-11729 AND TROUBLESHOT PER FIM B787-A-33-50-F1-E9A-421A-A. REMOVED EACH PROXIMITY LIGHT AT ROWS 52-48. FOUND LIGHT AT 51D AND 51F TO BE FAULTY. FOUND BOTH LIGHTS & CONNECTORS COVERED IN OLD COFFEE. CLEANED, REMOVED AND REPLACED BOTH PROXIMITY LIGHTS IAW AMM 33-51-06-00A-520A-A AND 33-51-06-00A-720A-A. ALL LIGHTS FUNCTION FULLY. OPS CHECKED GOOD, NO ACTIVE FAULTS.