N672US

Part: POWER SUPPLY — INOPERATIVE (EMERGENCY LIGHT) · airframe 62,515 hrs · 7,763 cycles

RT EXTERIOR EMERGENCY LIGHT AFT OF WING INOPERATIVE. TROUBLESHOT IAW WDM 33-51-42 AND REPLACED POWER SUPPLY AND BATTERY IAW MM 33-51-04, OPS CHECKED GOOD. OK FOR SERVICE.

Part: FUSE — INOPERATIVE (EMERGENCY LIGHTS) · airframe 61,568 hrs · 7,651 cycles

DURING INSPECTION, FOUND EMERGENCY LIGHTS AT LT OVERWING FWD INOPERATIVE. REPLACED FUSE IN POWER SUPPLY.

Part: POWER SUPPLY — INOPERATIVE (EMERGENCY LIGHTS) · airframe 61,568 hrs · 7,651 cycles

DURING INSPECTION, EMERGENCY LIGHTS AT RT OVERWING FORWARD AND AFT WERE INOPERATIVE. REPLACED POWER SUPPLY FOR RT FWD AND RELAMPED RT AFT LIGHTS.

Part: FLAP TRACK — DAMAGED (TE FLAP) · corrosion level 2 · airframe 57,086 hrs · 7,102 cycles

DURING INSPECTION, FOUND LEFT OUTBOARD TRAILING EDGE FLAP NR 2 FLAP TRACK OUTBOARD FORWARD UPPER FLANGE SURFACE CORROSION. MAINTENANCE REMOVED AND REPLACED NR 2 FLAP TRACK AS PER B747-400 AMM 27-51-27.

Part: LAMP — INOPERATIVE (EMERGENCY LIGHT) · airframe 56,611 hrs · 7,044 cycles

DURING INSPECTION FOUND EMERGENCY LIGHTS OUT AT 74, 78, 79. MAINTENANCE RELAMPED, OPS CHECKED OK.

Part: POWER SUPPLY — INOPERATIVE (EMERGENCY LIGHTS) · airframe 56,427 hrs · 7,021 cycles

DURING INSPECTION FOUND EXTERIOR EMERGENCY LIGHT INOPERATIVE AT RIGHT FORWARD OVERWING. MAINTENANCE REPLACED POWER SUPPLY BPS7-3 AND DEFECTIVE FUSE ON M7919 POWER SUPPLY. PERFORMED EMERGENCY LIGHTS CHECK, OK AS PER B747-400 AMM NR 33-51.

Part: CONNECTOR — DIRTY (EMERGENCY LIGHTS) · airframe 56,172 hrs · 6,988 cycles

DURING INSPECTION, FOUND SEVERAL FLOOR PROXIMITY EMERGENCY LIGHTS INOPERATIVE. MAINTENANCE CLEANED CONNECTIONS AND REPLACED LAMPS.

Part: FUSE — INOPERATIVE (EMERGENCY LIGHT) · airframe 56,072 hrs · 6,976 cycles

DURING INSPECTION FOUND RIGHT OVERWING EMERGENCY LIGHT AT MOST FORWARD WON'T TURN ON. MAINTENANCE REPLACED FUSE ON M7919 POWER SUPPLY AND PERFORMED OPERATIONAL CHECKED OK AS PER AMM 33-51.

Part: CONNECTOR — LOOSE (CABIN) · airframe 55,676 hrs · 6,927 cycles

DURING INSPECTION, FOUND EMERGENCY LIGHTS FROM DOOR 2LT TO ROW 22ABC ARE INOPERATIVE. MAINTENANCE SECURED LOOSE CONNECTION AND TEST OK PER B747 AMM 33-51-12/201.

Part: CONNECTOR — LOOSE (CABIN) · airframe 55,676 hrs · 6,927 cycles

DURING INSPECTION FOUND EMERGENCY LIGHTS FROM ROW 51HJK THROUGH 63HJK ARE INOPERATIVE. MAINTENANCE SECURED LOOSE CONNECTION AND TEST OK PER B747 AMM 33-51-12/201.

Part: CONNECTOR — LOOSE (CABIN) · airframe 55,113 hrs · 6,859 cycles

DURING A MAINTENANCE VISIT, THE EMERGENCY ESCAPE PATH LIGHT BY LAVATORY DOOR 4L WAS FOUND TO BE INOPERATIVE. MAINTENANCE FOUND THE WIRE CONNECTOR LOOSE BY SEAT 43C AND RECONNECTED IT. SYSTEM OPERATION WAS NORMAL AFTER THE CONNECTOR WAS RECONNECTED.

Part: FUSE — OPEN (CABIN) · airframe 55,073 hrs · 6,854 cycles

DURING A MAINTENANCE VISIT, THE OVERWING EMERGENCY LIGHT ON THE RIGHT SIDE WAS FOUND TO BE INOPERATIVE. MAINTENANCE FOUND THE POWER SUPPLY FUSE OPEN AND REPLACED IT. SYSTEM OPERATION WAS NORMAL AFTER THE FUSE WAS REPLACED.

Part: POWER SUPPLY — INOPERATIVE (CABIN) · airframe 54,593 hrs · 6,801 cycles

DURING A MAINTENANCE VISIT, THE FORWARD OVERWING EMERGENCY LIGHT ON THE LEFT SIDE WAS FOUND TO BE INOPERATIVE. MAINTENANCE FOUND THE POWER SUPPLY FUSE AT 3L DOOR DEFECTIVE. MAINTENANCE REPLACED THE POWER SUPPLY. SYSTEM OPERATION WAS NORMAL AFTER THE POWER SUPPLY WAS REPLACED.

Part: POWER SUPPLY — INOPERATIVE (CABIN) · airframe 53,364 hrs · 6,664 cycles

DURING A MAINTENANCE VISIT, THE FORWARD EXTERIOR EMERGENCY LIGHT ON THE LEFT SIDE WAS FOUND TO BE INOPERATIVE. MAINTENANCE REPLACED THE POWER SUPPLY. SYSTEM OPERATION WAS NORMAL AFTER THE POWER SUPPLY WAS REPLACED.

Part: LIGHT — INOPERATIVE (CABIN) · airframe 52,864 hrs · 6,606 cycles

DURING A MAINTENANCE VISIT, THE EMERGENCY SLIDE LIGHT AT DOOR 4R WAS FOUND TO BE INOPERATIVE. MAINTENANCE REPLACED THE DOOR SLIDE LIGHT PER B747 AMM 33-51-06. SYSTEM OPERATION WAS NORMAL AFTER THE SLIDE LIGHT WAS REPLACED.

Part: POWER SUPPLY — INOPERATIVE (EMERGENCY LIGHT) · airframe 49,747 hrs · 6,228 cycles

DURING A LINE CHECK, MX FOUND THE RT 3RD & 4TH OVERWING EMERGENCY LIGHTS INOPERATIVE. MX REPLACED THE POWER SUPPLY M7920 AND BATTERY. OPS CHECK WAS GOOD.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHT) · airframe 497,476 hrs · 6,228 cycles

DURING A LINE CHECK, MX FOUND THE RT FWD EXTERIOR EMERGENCY LIGHT INOPERATIVE. MX REPLACED THE POWER SUPPLY M7919 AND BATTERY. OPS CHECK WAS GOOD.

Part: FUSE — BLOWN (POWER SUPPLY) · airframe 48,753 hrs · 6,104 cycles

DURING A LINE CHECK, MAINTENANCE FOUND THE RT MOST FWD OVERWING EMERGENCY LIGHT INOPERATIVE. MAINTENANCE REPLACED A POWER SUPPLY FUSE. OPERATIONAL CHECK WAS GOOD. (2010-00830)

Part: INDICATOR — ODOR (WX RADAR) · airframe 48,296 hrs · 6,050 cycles

DURING FLIGHT, THE CAPT'S RADAR DISPLAY EMITTED AN ELECTRICAL SMOKE ODOR AND BECAME ERRATIC. RADAR DISPLAY WAS SHUTOFF AND ODOR DISSIPATED. MX CONFIRMED THE WX RADAR INDICATOR AS THE SOURCE OF THE ODOR AND REPLACED IT. OPS TEST WAS GOOD.

Part: CONNECTOR — LOOSE (EMERGENCY LIGHTS) · airframe 48,218 hrs · 6,039 cycles

DURING LINE CHECK, MX FOUND THE B ZONE LT EMERGENCY PATH LIGHTS INOPERATIVE. MX SECURED A LOOSE CONNECTOR. OPS CHECK WAS GOOD.

Part: FLOOR SUPPORT — CORRODED (BS 980) · corrosion level 2 · airframe 48,190 hrs · 6,035 cycles

DURING M-CHECK FOUND CORROSION ON UPPER DECK FLOOR SUPPORT AT BS 980 RBL 20. REPAIRED IAW SRM 53-00-52.

Part: CONNECTOR — DAMAGED (EMERGENCY LIGHT) · airframe 47,962 hrs · 6,006 cycles

DURING LINE CHECK, MAINTENANCE FOUND EMERGENCY PATH LIGHTS AT ROW 51HJK THROUGH 65HJK INOPERATIVE. MAINTENANCE REPAIRED CONNECTION AT THE LIGHT ASSEMBLY. OPERATIONAL CHECK WAS GOOD.

Part: WIRE — DISCONNECTED (CABIN) · airframe 47,539 hrs · 5,954 cycles

DURING LAYOVER CHECK, MX FOUND EMERGENCY PATH LIGHTS ROW 51-66 RT SIDE INOPERATIVE. MX RECONNECTED THE LIGHT WIRING AT ROW 66. OPS CHECK WAS GOOD.

Part: LIGHT — INOPERATIVE (CABIN) · airframe 47,527 hrs · 5,953 cycles

DURING LAYOVER CHECK, MX FOUND EMERGENCY PATH LIGHTS AT DOOR 4L F/A AREA INOPERATIVE. MX REPLACED THE PATH LIGHT ASSY. OPS CHECK WAS GOOD.

Part: LIGHT — INOPERATIVE (L2 DOOR SLIDE) · airframe 46,326 hrs · 5,818 cycles

DURING LAYOVER CHECK, MX FOUND THE EMERGENCY SLIDE LIGHT ON PAX DOOR 2L INOPERATIVE. MX REPLACED THE EMERGENCY LIGHT ASSY. OPS CHECK WAS GOOD.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHTS) · airframe 46,048 hrs · 5,775 cycles

DURING LINE CHECK, RT UPPER DECK DOOR BATTERY TEST FAILED. REPLACED BATTERY PACK IAW AMM 52-23-14. OPS CHECKS GOOD.

Part: POWER SUPPLY — DEFECTIVE (CABIN) · airframe 45,262 hrs · 5,681 cycles

DURING AN OVERNIGHT LINE CHECK THE EMERGENCY ESCAPE PATH LIGHTS AT ROWS 77 THROUGH 79 IN THE UPPER DECK WERE FOUND TO BE INOPERATIVE. MAINTENANCE FOUND POWER SUPPLY M5933 TO BE DEFECTIVE AND REPLACED IT. SYSTEM OPERATION WAS NORMAL AFTER THE POWER SUPPLY REPLACED.

Part: CONNECTOR — DAMAGED (EMERGENCY LIGHTS)

MX FOUND THE EMERGENCY LIGHTS FOR THE LT OVERWING EXIT INOPERATIVE DURING AN OVERNIGHT LINE CHECK. MX FOUND THE CONNECTOR FOR THE ASSOC PWR SUPPLY TO BE DAMAGED AND REPAIRED THE CONNECTOR PLUG. SYS OPERATION WAS NORMAL AFTER THE CONNECTOR PLUG WAS REPAIRED. (K)

Part: POWER SUPPLY — INOPERATIVE (EMERGENCY LIGHTS)

DURING OVERNIGHT CHECK, FOUND LT SIDE OVERWING EMERGENCY LIGHTS INOPERATIVE. MX REMOVED AND REPLACED POWER SUPPLY. OPS CHECKED GOOD, AND ACFT WAS RETURNED TO SERVICE. (K)

Part: WEB — DAMAGED (BS 2300) · airframe 37,768 hrs · 4,734 cycles

DURING "L" CHECK AND ACCOMPLISHMENT OF CREW REST MODIFICATION FOUND FLOOR WEB AT BS 2300 RBL 60-RBL 80 WITH SHORT EDGE MARGIN. REPAIRED PER EA 63-211481.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHT) · airframe 35,552 hrs · 4,435 cycles

DURING OVERNIGHT LINE CHECK, CEILING EMERGENCY LIGHT IN AFT CREW BUNK WAS INOP. MAINTENANCE REMOVED AND REPLACCED POWER PACK. OPERATIONAL CHECKED GOOD AND AIRCRAFT RETURNED TO SERVICE.

Part: LINE — LEAKING (HYD SYSTEM) · airframe 32,838 hrs · 4,071 cycles

DURING CRUISE, HYDRAULIC QUANTITY WENT TO ZERO. FOLLOWED COM PROCEDURE FOR LOSS OF HYDRAULIC SYSTEM. FLIGHT CONTINUED ON TO DTW. YELLOW EMERGENCY WAS DECLARED UPON ARRIVAL IN DTW. AIRCRAFT LANDING WAS UNEVENTFUL. MAINTENANCE REMOVED AND REPLACED RETURN TUBE WITH A TEMPORARY FLEX LINE, SERVICED NR 1 HYDRAULIC SYSTEM, AND SYSTEM LEAK CHECKS GOOD. OPERATIONAL CHECKED GOOD, AND AIRCRAFT RETURNED TO SERVICE.

Part: LIGHT — INOPERATIVE (CABIN) · airframe 32,838 hrs · 4,071 cycles

DURING OVERNIGHT CHECK, CABIN EMERGENCY FLOOR LIGHTS INOP LT SIDE ROWS 51-66. MAINTENANCE REMOVED AND REPLACED EMERGENCY LIGHTS. OPERATIONAL CHECKED GOOD, AIRCRAFT RETURNED TO SERVICE.

Part: PSEU — FAILED (MLG) · airframe 24,670 hrs · 3,004 cycles

DURING CLIMB, RECEIVED A GEAR DISAGREE AND GEAR DOOR EICAS MESSAGE ACCOMPANIED WITH VIBRATION AND NOISE. AIRCRAFT RETURNED TO DTW AND DUMPED 200,000 LBS OF FUEL AND LANDED WITHOUT INCIDENT. REPLACED THE PSEU. OPERATIONAL CHECK GOOD.

Part: OVEN — OVERHEATED (GALLEY) · airframe 23,474 hrs · 2,858 cycles

DURING FLIGHT, SMOKE EMITTED FROM THE 2-7 OVEN AS IT OPERATED HOTTER THAN THE MEDIUM SETTING CAUSING THE SMOKE ALARM TO ACTIVATE. THE OVEN WAS TURNED OFF AND THE CIRCUIT BREAKERS PULLED AND THE SMOKE DISSIPATED SILENCING THE SMOKE ALARM. AIRCRAFT CONTINUED TO DESTINATION AND LANDED WITHOUT INCIDENT. REPLACED THE OVEN AND OVEN CONTROLLER. OPERATIONAL CHECK GOOD.

Part: WIRE — BROKEN (EMERGENCY LIGHT) · airframe 18,334 hrs · 2,253 cycles

DURING LINE CHECK FOUND ZONE B-FLOOR PATH EMERGENCY LIGHTS INOPERATIVE. REPAIRED BROKEN WIRE. OPERATIONAL CHECK GOOD.

Part: OVEN — SMOKE (GALLEY) · airframe 17,963 hrs · 2,208 cycles

DURING FLIGHT SMOKE EMITTED FROM THE 3-28 OVEN IN THE NR 4 GALLEY. AIRCRAFT CONTINUED TO DESTINATION AND LANDED WITHOUT INCIDENT. REPLACED THE OVEN AND CONTROLLER. OPERATIONAL CHECK GOOD.

Part: CONTROLLER — INOPERATIVE (GALLEY OVEN) · airframe 17,387 hrs · 2,132 cycles

DURING FLIGHT SMOKE EMITTED FROM THE NR1 OVEN IN THE UPPER DECK. PULLED GALLEY CIRCUIT BREAKER, AIRCRAFT CONTINUED TO DESTINATION AND LANDED WITHOUT INCIDENT. REPLACED THE OVEN CONTROLLER, OPERATIONAL CHECK GOOD.

Part: PSEU — FAILED (NLG) · airframe 17,094 hrs · 2,095 cycles

DURING CLIMB RECEIVED A NOSE "GEAR DISAGREE" AND "GEAR DOOR" EICAS MESSAGE ACCOMPANIED WITH AIRFRAME VIBRATION DURING LANDING GEAR RETRACTION. AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED THE PSEU AND BOTH NOSE WHEEL ASSEMBLIES. OPERATIONAL CHECK GOOD.

Part: SLIDE — FAILED (PAX DOOR) · airframe 89,766 hrs · 21,401 cycles

DURING SLIDE SHOP TEST AT OPERATING PRESSURE, A MULTIPLE SEAM FAILURE OF THE LOWER AIR HOLDING SILL TUBE OCCURRED AT THE GIRT END. SLIDE WILL BE OVERHAULED AND RECEIVE A NEW INFLATABLE.

Part: POWER SUPPLY — INOPERATIVE (CABIN) · airframe 89,631 hrs · 21,383 cycles

DURING OVERNIGHT LINE CHECK, FOUND ''D'' ZONE FLOOR MOUNTED EMERGENCY LIGHTS INOPERATIVE. MAINTENANCE REPLACED THE POWER SUPPLY. OPERATIONAL CHECK OK.