N518US

Part: SKIN — GOUGED (BS 418 S17L) · airframe 69,077 hrs · 28,524 cycles

DURING LINE CHECK, FOUND DENTS AND GOUGES IN FUSELAGE SKIN AT BS 418 S17L. REPAIRED PER EA 55-210494 SECT I SECTION II PERMANENT REPAIR TO BE ACCOMPLISHED WITHIN 100 HOURS AND 50 CYCLES FROM ORIGINAL DATE OF DISCREPANCY.

Part: UNKNOWN — UNKNOWN (NR 2 ENGINE) · airframe 68,086 hrs · 28,148 cycles

DURING DESCENT, ENGINE NR 2 "VALVE LIGHT" ILLUMINATED FOLLOWED BY LOSS OF ENGINE OIL PRESSURE. ENGINE SHED ALL ELECTRICAL POWER. FLIGHT CREW SECURED ENGINE AND LANDED AT DESTINATION AIRPORT. MAINTENANCE REMOVED AND REPLACED ENGINE NR 2.

Part: LINE — LEAKING (HYD PUMP) · airframe 64,907 hrs · 26,885 cycles

DURING CRUISE THE RIGHT HYDRAULIC SYSTEM QUANTITY DECREASED TO ZERO AND SYSTEM PRESSURE LIGHT ILLUMINATED. FLIGHT CONTINUED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND A HYDRAULIC PRESSURE LINE AND THE ENGINE DRIVEN PUMP LEAKING. REMOVED AND REPLACED HYDRAULIC PRESSURE LINE, ENGINE DRIVEN PUMP, AND FILTERS. THE HYDRAULIC SYSTEM WAS FLUSHED, SERVICED, TESTED AND RETURNED TO SERVICE.

Part: FILTER — LEAKING (HYDRAULIC SYS) · airframe 64,742 hrs · 26,819 cycles

DURING CRUISE THE LEFT HYDRAULIC RESERVOIR LOW QUANTITY/PRESSURE LIGHT ILLUMINATED. AT TOP OF DESCENT THE HYDRAULIC PRESSURE LIGHTS ON THE ENGINE AND ELECTRIC PUMPS ILLUMINATED. DECLARED YELLOW EMERGENCY AND USED ALTERNATE GEAR AND FLAPS EXTENSION. AIRCRAFT LANDED WITHOUT INCIDENT AND WAS TOWED TO THE GATE. FOUND THE CASE DRAIN FILTER ASSEMBLY LEAKING. REMOVED AND REPLACED FILTER ASSEMBLY, REPLENISHED FLUIDS, OPERATIONALLY CHECKED AND RETURNED TO SERVICE.

Part: PUMP — CRACKED (HYD SYSTEM) · airframe 63,305 hrs · 26,227 cycles

DURING CRUISE 30 MINUTES AFTER TAKEOFF THERE WAS AN INCREASE IN RIGHT ENGINE VIBRATION AND THE RIGHT HYDRAULIC PRESSURE AND QUANTITY WENT TO ZERO. AIRCRAFT RETURNED TO MSP AND LANDING WAS UNEVENTFUL. FOUND CRACK IN (EDP) ENGINE DRIVEN HYD PUMP AND REPLACED PUMP. UPON SYSTEM PRESSURIZATION FOUND FUSE VALVE ON ALT ANTI-SKID MODULE LEAKING IN THE RIGHT WHEEL WELL. REPLACED FUSE, HYD SYSTEM TESTED GOOD AND RETURNED AIRCRAFT TO SERVICE.

Part: PUMP — LEAKING (HYD SYSTEM) · airframe 60,265 hrs · 25,011 cycles

DURING FLIGHT, THE CENTER HYDRAULIC PUMPS WERE TURNED OFF DUE TO THE HYDRAULIC QUANTITY AND PRESSURE WENT TO ZERO. LANDING WAS UNEVENTFUL. FOUND ELECTRIC PUMP LEAKING AT THE LOWER SEEP HOLE. REPLACED THE PUMP AND SERVICED SYSTEM. OPERATIONAL CHECK GOOD.

Part: TEE FITTING — CRACKED (FUSELAGE) · airframe 59,414 hrs · 24,659 cycles

DURING H-CHECK FOUND CRACKED TEE CLIP FITTING ON AFT SIDE OF FRAME AT BS 1681 STR 13 RT. REPAIRED PER EA 55-201106.

Part: FITTING — CRACKED (FUSELAGE) · airframe 59,414 hrs · 24,659 cycles

DURING H-CHECK FOUND CRACK IN FITTING ON AFT SIDE OF FRAME AT BS 1681 S13R. REPAIRED PER EA 55-201106.

Part: SEAT TRACK — CORRODED (FUSELAGE) · corrosion level 2 · airframe 59,413 hrs · 24,659 cycles

DURING H-CHECK FOUND CORROSION ON SEAT TRACK AT BS 365 RBL 45. REPAIRED PER EA 55-201067.

Part: LIGHT — INOPERATIVE (COCKPIT) · airframe 49,988 hrs · 20,946 cycles

DURING APPROACH, THE RIGHT LANDING GEAR LIGHT DID NOT DISPLAY GREEN. FLIGHT CREW FOLLOWED COM PROCEDURE BUT THE LIGHT STAYED OUT. EICAS MESSAGE GEAR DISAGREE WAS NOT DISPLAYED. LANDING WAS UNEVENTFUL. MAINTENANCE REPLACED THE RIGHT MAIN LANDING GEAR INDICATOR LIGHT ASSEMBLY. OPERATIONAL CHECK OK.

Part: WARNING SYSTEM — ACTIVATED (COCKPIT) · airframe 49,368 hrs · 20,684 cycles

TRAILING EDGE FLAP DISAGREE WARNING LIGHT ILLUMINATED WHEN FLAPS EXTENDED FROM FLAPS 15. PERFORMED COM PROCEDURES AND DECLARED AN EMERGENCY. AN UNEVENTFUL LANDING WAS MADE WITH FLAPS AT 20. MAINTENANCE PERFORMED OPERATIONAL CHECK OF FLAPS, CHECKED OK.

Part: POWER SUPPLY — INOP (CABIN)

DURING SCHEDULED MAINTENANCE, FIRST CLASS EMERGENCY LIGHT WAS INOPERATIVE. MAINTENANCE REPLACED THE ASSOCIATED POWER SUPPLY WITH A SERVICEABLE UNIT.

Part: POWER SUPPLY — INOPERATIVE (CABIN)

DURING PREFLIGHT, FOUND DOOR 3L EMERGENCY LIGHT INOPERATIVE. REPLACED POWER SUPPLY M735, OPERATIONAL CHECK OK.

Part: DUCT — FAILED (RT ENIGNE)

DURING CLIMB WITH TAKEOFF POWER, EGT WENT TO 652 DEGREES FOR 5 SECONDS WITH POWER REDUCTION, EGT RETURNED TO NORMAL. AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED BLOWN DUCT AND PRSOV. PERFORMED LEAK CHECK AND FULL ENGINE RUN-UP. AIRCRAFT OK FOR SERVICE.

Part: TCAS COMPUTER — MALFUNCTIONED (E/E COMPT)

DURING APPROACH, A FULL SCALE RESOLUTION ADVISORY TO CLIMB WAS INDICATED, PERFORMED GO-AROUND. DURING SECOND APPROACH, THERE WERE NUMEROUS TARGETS ON TCAS SCREEN THAT DID NOT EXIST. CREW SWITCHED TO TRAFFIC ADVISORY AND LANDED. MAINTENANCE REPLACED TCAS COMPUTER.

Part: FLOORBEAM — CORRODED (BS 1661)

DURING P-CHECK, FOUND CORROSION IN THE BS 1661 FLOORBEAM UPPER CHORD FROM LBL 60, BL 0. REPAIRED CHORD (P/N 146N5090) PER EA 55-120032.

Part: BATTERY PACK — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY FLOOR PATH LIGHTING INOPERATIVE FROM DOOR 1 TO DOOR 2. REPLACED LEFT FLOOR BATTERY.

Part: SKIN — CRACKED (PYLON)

DURING PERIODIC CHECK, FOUND CRACK IN THE NR 1 ENGINE NACELLE STRUT SKIN AT THE CUTOUT FOR ACCESS PANEL 433AL. REPAIRED PER EA 55-98206. MFG PART NUMBER 311N3450-15.

Part: FLOORBEAM — CORRODED (FS 345)

DURING PERIODIC CHECK, FOUND CORROSION ON THE FLOORBEAM UPPER CHORD FS 345 FROM LBL 10 TO LBL 24. REPAIRED PER EA 55-98208.

Part: EEC STATOR — FAILED (RT ENGINE)

DURING CRUISE, RECEIVED 'R ENG SEC CONT' MESSAGE AND LOST OIL TEMPERATURE INDICATIONS. AIRCRAFT DIVERTED TO DTW. RIGHT EEC STATOR WAS REPLACED AND THE AIRCRAFT CHECK OK FOR SERVICE.