As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE R-4 DOOR EMERGENCY EXIT SIGN WAS FOUND INOPERATIVE DURING TEST WHILE IN "C" CHECK. MAINTENANCE FOUND EMERGENCY EXIT SIGN WIRING HAD CHAFING DAMAGE AND A BLOWN FUSE AT EMERGENCY LIGHTS POWER SUPPLY M736. THE WIRING WAS REPAIRED IAW BOEING STANDARD WIRING PRACTICES MANUAL 20-61-11. THE FUSE WAS REPLACED AND TESTING WAS SATISFACTORY IAW MM 33-51-07.