N520US

Part: BATTERY — DISCHARGED (CABIN) · airframe 74,998 hrs · 30,836 cycles

ON 3 DAY FLIGHT DECK MODIFICATION FOUND RT DOOR EMERGENCY LIGHT INOP. MAINTENANCE REPLACED POWER SUPPLY BATTERY. OPS CHECK OKAY. RETURNED TO SERVICE.

Part: BRAKE ASSY — BINDING (NR 5 SPOILER) · airframe 73,847 hrs · 30,421 cycles

DURING THE TAKEOFF ROLL, THE AIRCRAFT BEGAN TO DRIFT LEFT OF THE RUNWAY CENTERLINE, THE CREW ATTEMPTED TO CORRECT THE DRIFTING WITH THE APPLICATION OF RIGHT RUDDER BUT WERE UNSUCCESSFUL AND ABORTED THE TAKE OFF BETWEEN 70 AND 80 KNOTS. AFTER AN UNEVENTFUL RETURN TO THE GATE, MAINTENANCE FOUND FAULTS ON THE RUDDER RATIO AND ONE OF THE RUDDER PCAS BOTH FAULTS CLEARED FURTHER INSPECTION FOUND THE NR 5 BRAKE ASSEMBLY BINDING. THE BRAKE ASSEMBLY WAS REPLACED AND THE AIRCRAFT PERFORMED A SUCCESSFUL TEST FLIGHT AND ALL SYSTEMS OPERATED NORMALLY AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: BATTERY PACK — DEFECTIVE (EMERGENCY LIGHTS) · airframe 73,568 hrs · 30,298 cycles

DURING AN OVERNIGHT LINE CHECK THE EMERGENCY LIGHTS IN ROW 14 THROUGH ROW 23 WOULD NOT TEST. MAINTENANCE FOUND TWO BATTERY PACK TO BE DEFECTIVE AND REPLACED THEM. SYSTEM OPERATION WAS NORMAL AFTER THE BATTERY PACKS WERE REPLACED.

Part: BATTERY PACK — DEFECTIVE (EMERGENCY LIGHT) · airframe 71,906 hrs · 29,661 cycles

DURING AN OVERNIGHT LINE CHECK THE EMERGENCY ESCAPE PATH LIGHTING IN THE AFT SECTION OF THE PAX CABIN WAS FOUND TO BE INOPERATIVE. MX FOUND THE ASSOCIATED BATTERY PACK TO BE DEFECTIVE AND REPLACED IT. ALL OPS CHECKED GOOD AFTER REPLACEMENT.

Part: POWER SUPPLY — DISCHARGED (CABIN) · airframe 69,447 hrs · 28,794 cycles

DURING OVERNIGHT CHECK, FOUND EMERGENCY FLOOR LIGHTS FROM ROW 14 TO 23 INOP. MAINTENANCE REMOVED AND REPLACED POWER SUPPLY. OPERATIONAL CHECKED GOOD AND AIRCRAFT WAS RETURNED TO SERVICE.

Part: POWER SUPPLY — INOPERATIVE (EMERGENCY LIGHTS) · airframe 68,305 hrs · 28,358 cycles

DURING OVERNIGHT CHECK, FOUND EMERGENCY FLOOR TRACK LIGHTS IN FIRST CLASS INOP. MAINTENANCE REMOVED AND REPLACED POWER SUPPLY. OPERATIONAL CHECKED GOOD AND AIRCRAFT RETURNED TO SERVICE.

Part: WIRE — CUT (EMERGENCY LIGHT) · airframe 67,411 hrs · 28,031 cycles

FIRST CLASS EMERGENCY FLOOR PROXIMITY LIGHTS WILL NOT TEST. FOUND FLOOR PROXIMITY LIGHT WIRES CUT AND SEAT TRACK COVER INSTALLED INCORRECTLY AT SEATS 2 C/D. REPAIRED WIRES PER SWPM 20-15-26, OPS CHECKS GOOD. OK FOR SERVICE.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHT) · airframe 64,304 hrs · 26,782 cycles

DURING LINE CHECK FOUND MID CABIN EMERGENCY LIGHTS INOPERATIVE. REPLACED EMERGENCY LIGHT BATTERY PACK ASSEMBLY. OPERATIONALLY CHECKED AND RETURNED TO SERVICE.

Part: FLOOR SUPPORT — CORRODED (GALLEY) · corrosion level 2 · airframe 59,561 hrs · 24,894 cycles

DURING H-CHECK FOUND CORROSION ON GALLEY FLOOR SUPPORT AT BS 365 RBL 24. REPAIRED PER EA 55-201148.

Part: ACTUATOR — FAILED (L/E SLAT) · airframe 50,873 hrs · 21,393 cycles

DURING APPROACH, UPON SELECTION OF FLAPS 1, THE LEADING EDGE SLAT DISAGREE WARNING LIGHT ILLUMINATED. AN EMERGENCY WAS DECLARED, THE FLIGHT CONTINUED THE APPROACH, AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE NR 20 LEADING EDGE ACTUATOR. SUBSEQUENT SYSTEM TESTS WERE SATISFACTORY.

Part: LINE — RUPTURED (LT WHEEL WELL) · airframe 49,707 hrs · 20,950 cycles

ON GEAR EXTENSION, THE LEFT HYDRAULIC SYSTEM QUANTITY DECREASED TO ZERO AND A "L HYD SYS PRESS" MESSAGE WAS DISPLAYED. FLIGHT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE LEFT MAIN LANDING GEAR DOWNLOCK RETURN LINE. OPERATIONAL TESTS WERE SATISFACTORY.

Part: SLIDE — RUPTURED (PAX DOOR) · airframe 46,969 hrs · 19,878 cycles

DURING SLIDE SHOP TEST AT PERATING PRESSURE, INFLATABLE SEAM RUPTURED AT LEFT DOG LEG. SLIDE WILL BE OVERHAULED AND RECEIVE A NEW INFLATABLE.

Part: CIRCUIT BREAKER — TRIPPED (RECIRC FAN) · airframe 46,743 hrs · 19,778 cycles

R RECIR FAN EICAS MESSAGE AND RECIRCULATION FAN INOPERATIVE LIGHT ILLUMINATED WITH SWITCH POSITIONED ON. MAINTENANCE FOUND FIRE DAMAGE TO THE FAN WIRE HARNESS, INSULATION BLANKETS, FAN ELECTRICAL PLUG, AND LOWER FAN BRACKET. REPAIRED FAN WIRE HARNESS. REPLACED RECIRCULATION FAN, BLANKETS, AND ELECTRICAL PLUG. ALSO REPLACED RIGHT RECIRCULATION FAN CIRCUIT BREAKER AND RELAY. OPERATIONAL CHECK OK.

Part: BATTERY PACK — INOPERATIVE (CABIN) · airframe 46,202 hrs · 19,560 cycles

EMERGENCY FLOOR LIGHTS FROM SEAT 23 - 33 INOPERATIVE DURING TEST. MAINTENANCE REPLACED THE BATTERY PACK AT DOOR 3R, OPERATIONAL CHECK OK.

Part: FLOORBEAM — CORRODED (BS 1681)

DURING T CHECK, FOUND CORROSION ON UPPER SURFACE OF FLOORBEAM AROUND FASTENER HOLE FS 1681, LBL 39.5. REPAIRED PER EA 55-163314.

Part: FLOORBEAM — CORRODED (BS 1660)

DURING PERIODIC CHECK, FOUND CORROSION ON CABIN FLOORBEAM AROUND NUT PLATES ON TOP SURFACE FS 1660, BL 0 THROUGH LBL 56. REPAIRED PER EA 55-123842.

Part: OIL FILTER LIGHT — ILLUMINATED (NR 1 ENGINE)

AFTER PUSHBACK, THE NR 1 ENGINE OIL FILTER EICAS MESSAGE WAS DISPLAYED. AIRCRAFT RETURNED TO THE GATE. GROUND MAINTENANCE CHECKED MAG PLUGS AND REPLACED MAIN OIL STRAINER. NO CONTAMINATES WERE FOUND.

Part: DOOR WARNING — MALFUNCTIONED (LT AFT DOOR)

DURING TAKEOFF ROLL DTW-MEM, LEFT AFT DOOR WARNING LIGHT ILLUMINATED. ABORTED TAKEOFF WITHOUT INCIDENT. OPERATIONAL CHECK OK, NO TROUBLE FOUND.

Part: IDG — MALFUNCTIONED (LT ENGINE)

AT THE START OF TAKEOFF, THE LEFT GENERATOR DRIVE LIGHT FLICKERED AND THE LEFT GENERATOR CONTROL LIGHT ILLUMINATED; ABORTED TAKEOFF. PLACED THE LEFT IDG ON MEL 24-00-1. REPLACED THE LEFT INTEGRATED DRIVE GENERATOR AT MSP. SYSTEM CHECK ON RUN-UP WAS NORMAL.

Part: CONTROL CABLE — LACK OF LUBE (PARKING BRAKE)

RECEIVED CONFIGURATION WARNING AFTER TAKEOFF THRUST AND EPR MODE WAS SET. ABORTED TAKEOFF. SET AND RELEASED THE PARKING BRAKE HANDLE AND THE LIGHT REMAINED OUT. CONTINUED TAKEOFF. LUBRICATED BRAKE CABLE ON ARRIVAL IN DCA. PARKING BRAKE RELEASE CHECKED NORMAL.

Part: INDICATION — MALFUNCTION (ENG OIL)

DURING CRUISE, RECEIVED 'L ENG OIL COOL' AND 'L ENG PRICONT' STATUS MESSAGE. THE EPR BLANKED OUT AT THE LOWER POWER SETTINGS BELOW 1.1 EPR. OIL TEMPERATURES REMAINED IN NORMAL POWER RANGES. AIRCRAFT DIVERTED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE LEFT ELECTRONIC ENGINE CONTROL ALTERNATOR STATOR AND LEFT PROPULSION DISCRETE INTERFACE UNIT. SYSTEM CHECKED NORMAL ON GROUND RUN.