What was found
DURING A A03 CHECK, EMERGENCY LIGHT TEST, ACTIVE CLASS 1 FAULT CIDS 1335100 EXIT SIGNS, EMERGENCY POWER SUPPLY UNIT 3R 16WL. REPLACED THE POWER SUPPLY IAW AMM 33-51-38, AND PERFORMED SATISFACTORY OPS CHECK. THE AIRCRAFT WAS GROUNDED
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING A A03 CHECK, EMERGENCY LIGHT TEST, ACTIVE CLASS 1 FAULT CIDS 1335100 EXIT SIGNS, EMERGENCY POWER SUPPLY UNIT 3R 16WL. REPLACED THE POWER SUPPLY IAW AMM 33-51-38, AND PERFORMED SATISFACTORY OPS CHECK. THE AIRCRAFT WAS GROUNDED