What was found
FIRE CARGO FORWARD REFERENCE WORK ORDER 100088021/100088022 FOR FORWARD FAILED AUTOMATIC FIRE/OVERHEAT LOGIC/TEST SYSTEM A31/A33, REPLACED AND OPERATIONS CHECK GOOD IAW AMM 26-10-01 PERFORMED SQUIB DISCHARGE TEST OF ALL LOWER LUBE FIRE BOTTLES IAW AMM 26-23-00 ALL OPERATIONS CHECK GOOD. REMOVED AND REPLACED THE A31 AUTOMATIC FIRE/OVERHEAT LOGIC/TEST SYSTEM PRINTED CIRCUIT CARD IAW BOEING 747-400 AMM 26-10-01. OPERATIONS TEST GOOD. REMOVED AND REPLACED THE A33 PRINTED CIRCUIT CARD IAW BOEING 747-400 AMM 26-10-01. OPERATIONS TEST GOOD. SPECIFIC PART CAUSING DIFFICULTY: PART NAME: PRINTED CIRCUIT ASSY, MANUFACTURER'S NAME: UNKNOWN, PART NUMBER: 285N0028-136, SERIAL NUMBER: D17054, PART CONDITION: CORRODED, PART LOCATION: CARGO, TOTAL TIME: UNKNOWN, CYCLES: UNKNOWN, HOURS: UNKNOWN