What was found
ON FINAL FOR 8R, AIRCRAFT LOWER CARGO FIRE WARNING ANNUNCIATED. FOLLOWED QRH AND DISCHARGED FIRE BOTTLES. PER B747-400 AMM 05-51-95 CONDITIONAL INSPECTION COMPLETED AND NO DEFECTS NOTED. CARGO DETECTOR AIRCRAFT 3 LOOP B FAIL. REPLACED CARGO AIRCRAFT 3 LOOP B SMOKE DETECTOR PER AMM 26-16-01. OPERATIONAL CHECK OK. ENGINE RUN REQUIRED FIRE AND SMOKE DETECTOR REFERENCE WORK ORDER 100178323. ENGINE RUN / OPERATIONAL CHECK COMPLETE IAW GMM 7.3 AND AMM 71-00-00. NO DEFECTS NOTED. OK FOR SERVICE. CARGO DETECTOR AIRCRAFT 4 LOOP B FAIL. REPLACED CARGO AIRCRAFT 4 LOOP B SMOKE DETECTOR PER AMM 26-16-01 OPERATIONAL CHECK OK. PART NUMBER ON: 2156-55 SERIAL NUMBER ON: 4558B PART NUMBER OFF: 2156-55 SERIAL NUMBER OFF: 2966B. LOWER LOBE CARGO SMOKE DETECTION SYSTEM FORWARD & AIRCRAFT REQUIRES DEFERRAL. TRANSFERRED TO DMI #100178331 PER MEL 26-16-1-2-2B CATEGORY C DUE: 06-3-24. (M) PROCEDURES COMPLIED WITH PLACARD INSTALLED. 100178339 REFERENCE DMI 100178331. PERFORMED LOWER CARGO SMOKE DETECTION TEST IAW KA MEL 26-16-1-2B & B747-400 AMM 26-16-00 NO DEFECTS NOTED. REFERENCE WORK ORDER #100178323 LOWER LOBE COMPARTMENT FORWARD FIRE EXTINGUISHER SYSTEM REQUIRES DEFERRAL. TRANSFERRED TO DMI #100178332 PER MEL 26-23-1-2 CATEGORY C DUE: 6-3-24 (M) PROCEDURES COMPLIED WITH AND PLACARD INSTALLED. 100178338 REFERENCE DMI 100178332. VERIFIED CARGO COMPARTMENT CONTAINS NO FLAMMABLES IAW KA MEL 26-23-1-2. REFERENCE DMI #100178332 LL FORWARD CARGO FIRE EXTINGUISH SYSTEM. REFERENCE WORK ORDER 100178346 & 100178347, 100178348, 100178349, 100178350, 100178351, 100178352, 100178353 FOR CORRECTIVE ACTION THIS CLEARS DMI #100178332. PLACARDS REMOVED. REFERENCE DMI #100178331 LL CARGO SMOKE DETECTION. REFERENCE WORK ORDER 100178354 FOR CORRECTIVE ACTION THIS CLEAR DMI #100178355 PLACARDS REMOVED.