N601US

Part: ENGINE — FLAMED OUT (NR 4)

DURING CRUISE AT FL390, THE NR 4 ENGINE FLAMED OUT. THE AIRCRAFT DESCENDED TO FL330 AND THE ENGINE WAS RESTARTED PER COM. THE AIRCRAFT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE ENGINE PER FIM, WITH NO DISCREPANCIES NOTED. THE ENGINE FUEL FILTER WAS REPLACED AND THE SUBSEQUENT ENGINE RUN WAS NORMAL.

Part: ENGINE — FLAMED OUT (NR 2)

WHILE AT CRUISE FL330 AND IN LIGHT TO MODERATE TURBULENCE, THE NR 2 ENGINE APPEARED TO ROLL BACK TO IDLE AND WOULD NOT RESPOND TO THRUST LEVER MOVEMENT. ENGINE FLAMEOUT PROCEDURES WERE FOLLOWED AND THE ENGINE WAS RESTARTED. AFTER RESTART THE ENGINE OPERATED NORMALLY FOR THE REMAINDER OF THE FLIGHT. NO OPERATING PARAMETERS WERE EXCEEDED. MAINTENANCE PERFORMED FIM 71-01-00 PROCEDURE AND REPLACED THE FUEL FILTER AND TT2 SENSOR. AN ENGINE RUN WAS COMPLETED WITH NO PROBLEMS NOTED AND THE AIRCRAFT RETURNED TO SERVICE. EXACT PART CAUSING PROBLEM TO BE DETERMINED.

Part: SPAR WEB — CORRODED (FS 1521)

DURING PERIODIC CHECK, FOUND CORROSION ON LEADING EDGE FORWARD SPAR WEB AT FS 1521 AT LOWER SPAR CHORD. REPAIRED PER EA 66-152528.

Part: ENGINE — FLAMED OUT (NR 4)

NR 4 ENGINE FLAMED OUT AT FL370 WITH IGNITION OFF AND CONDITIONS CALM. RESTART AT FL290 OK. NO FURTHER PROBLEMS. MAINTENANCE INSPECTED INLET AND EXHAUST, FOUND OK. FUEL FILTER WAS CLEAN. REPLACED THE TT2 SENSOR, HIGH POWER RUN CHECKED NORMAL. SPECIFIC PART CAUSING PROBLEM TO BE DETERMINED.

Part: ENGINE — MALFUNCTIONED (NR 4)

DURING TAXI, THE NR 4 ENGINE EGT WENT TO TOP OF GAUGE FOR APPROXIMATELY 90 TO 120 SECONDS. ALSO, NR 4 ENGINE OIL RPESSURE WARNING LIGHT ILLUMINATED. NO FIRE WARNING AND OIL TEMPERATURE WAS NORMAL. MAINTENANCE INSPECTED ENGINE PER MM 72-00-00. NO DEFECTS WERE NOTED. ENGINE RUN AT IDLE CHECKED GOOD. SPECIFIC PART CAUSING PROBLEM TO BE DETERMINED.

Part: WIRE — BROKEN (CABIN)

DURING LINE CHECK, FOUND LEFT 'A' ZONE EMERGENCY PATH LIGHTS INOPERATIVE. REPAIRED BROKEN WIRE AT 5B, OPERATIONAL CHECK GOOD.

Part: PANEL — CRACKED (RT WING)

DURING CLIMB, A CRACK WAS NOTED ON THE RIGHT HAND WING LEADING EDGE UPPER SKIN PANEL 6 FEET FROM FUSELAGE. THE AIRCRAFT RETURNED TO NRT AND LANDED WITHOUT INCIDENT, NO EMERGENCY WAS DECLARED. THE PANEL WAS REPAIRED AND REINSTALLED.

Part: PRBC — MALFUNCTIONED (NR 4 ENGINE)

AT TOP OF DESCENT, THE NR 4 ENGINE EXPERIENCED A MILD COMPRESSOR STALL. AS EGT STARTED TO CLIMB TO APPROXIMATELY 850 DEGREES, CREW FOLLOWED COM PROCEDURE, SHUT DOWN THE ENGINE AND ACCOMPLISHED A SUCCESSFUL RESTART AT FL240. FLIGHT CONTINUED TO NRT WITHOUT FURTHER INCIDENT. BORESCOPE INSPECTION OF 8TH, 9TH AND 15 STAGES OF HPC REVEALED NO DISCREPANCIES. MAINTENANCE CHANGED THE PRBC, CONVERTER VALVE, AND PS4 RESTRICTOR.

Part: OVERHEAT WIRE — FAILED (NR 3 HYD BAY)

DURING CLIMB, THE NR 3 HYDRAULIC SYSTEM OVERHEAT LIGHT ILLUMINATED. FOLLOWED COCKPIT OPERATING MANUAL PROCEDURES AND LIGHT REMAINED ILLUMINATED. AIRCRAFT RETURNED TO NRT AND LANDED WITHOUT INCIDENT. REPAIRED WIRE FOR OVERHEAT INDICATION IN THE NR 3 HYDRAULIC BAY, OPERATIONAL CHECK GOOD.

Part: BLEED CONTL VLV — MALFUNCTIONED (NR 4 ENGINE)

DURING APPROACH, THE NR 4 ENGINE STALLED. CREW SHUT DOWN THE ENGINE. WHEN ENGINE WAS RESTARTED, THE NR 4 EGT ROSE TO 760 DEGREES AND THE ENGINE WAS SHUT DOWN FOR THE REMAINDER OF THE FLIGHT. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. REPLACED THE PRESSURE RATIO BLEED CONTROL AND BLEED CONVERTER VALVE, BORESCOPED ENGINE, PERFORMED WINDMILL INSPECTION, AND TRIMMED THE ENGINE. OPERATIONAL CHECK GOOD.

Part: CONDITION MOTOR — MALFUNCTIONED (NR 3 ENGINE)

DURING TAXIING, THE NR 3 ENGINE EXPERIENCED HOT START AND EGT CLIMBED TO 900 DEGREES. THE ENGINE WAS SHUTDOWN AND THE AIRCRAFT RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 3 ENGINE CONDITION MOTOR AND PERFORMED RUNUP CHECK. RUNUP WAS NORMAL AND AIRCRAFT RETURNED TO SERVICE.

Part: SKIN — CORRODED (FS 1960)

DURING P-CHECK, FOUND CORROSION ON THE FUSELAGE SKIN AT BS 1960, STR 29R - STR 42R. REPAIRED SKIN (P/N 65B07000-9) PER EA 66-99465.

Part: FITTING — CORRODED (FS 1416)

DURING P-CHECK, FOUND CORROSION ON THE BS 1416 FRAME TO STRINGER TIE FITTING, 28 INCHES BELOW THE CEILING IN THE LEFT BODY GEAR WHEELWELL. REPLACED FITTING.

Part: FRAME — CORRODED (CARGO DOOR)

DURING P-CHECK, FOUND CORROSION ON THE BULK CARGO DOOR FORWARD LOWER CORNER FRAME. REPAIRED FRAME (P/N 65B07094-1) PER EA 66-99453.

Part: RIB — CRACKED (WS 1453)

DURING P-CHECK, FOUND A CRACK IN THE LEFT WING LEADING EDGE RIB AT FSSI 1453. REPAIRED RIB (P/N 65B07848-5) PER EA 66-99441.

Part: SILL — CRACKED (FS 2280)

DURING P-CHECK, FOUND A CRACK AND CORROSION IN THE DOOR 5R LOWER SILL CHORD BS 2280. REPAIRED CHORD (P/N 65B04423-2) PER EA 66-99546.

Part: FITTING — CRACKED (FS 1668)

DURING P-CHECK, FOUND A 2.125 INCH CRACK IN THE NR 4 RIGHT DOOR FORWARD SIDE CUTOUT FITTING BS 1668, 8 INCHES ABOVE THE THRESHOLD. REPLACED FITTING PER SRM 51-10-01 PAR 9.

Part: FITTING — CORRODED (FS 1480)

DURING P-CHECK, FOUND CORROSION ON THE BS 1480 BULKHEAD TO THE KEEL BEAM TORQUE BOX DRAG FITTING IN THE RIGHT BODY LANDING GEAR WHEEL WELL. REPLACED FITTING.

Part: BLKHD WEB — CRACKED (FS 400)

DURING P-CHECK, FOUND A CRACK IN THE BS 400 BULKHEAD WEB LBL 41 AT THE UPPER INBOARD CORNER OF THE LEFT CUTOUT. REPAIRED THE WEB (P/N 65B07936) PER EA 66-99395.

Part: SELECTOR VALVE — FAILED (BRAKE SYST)

AFTER TAKEOFF, GEAR AND FLAPS CHECKED UP, NR 4 HYDRAULIC SYSTEM QUANTITY INDICATION ILLUMINATED. CREW FOLLOWED COCKPIT OPERATING PROCEDURE AND RETURNED TO NRT. REPLACED RESERVE BRAKE SELECTOR VALVE AND PERFORMED LEAK CHECK. CHECK WAS NORMAL AND AIRCRAFT RETURNED TO SERVICE.

Part: HYD SWIVEL — BROKEN (RT MLG)

DURING CLIMB, AIRCRAFT LOST HYDRAULIC QUANTITY ON THE NR 4 HYDRAULIC SYSTEM, WHEN THE LANDING GEAR WAS RETRACTED. AIRCRAFT RETURNED TO NRT AND LANDED WITHOUT INCIDENT. FOUND BROKEN SWIVEL JOINT ON THE RIGHT WING LANDING GEAR DOWNLOCK ACTUATOR. REPLACED ADP AND EDP ASSEMBLIES. REPLACED CASE DRAIN AND PRESSURE FILTER FOR ADP/EDP. OPERATIONAL CHECK GOOD.

Part: CSD OIL COOLER — LEAKING (NR 2 ENGINE)

AT FL 350, THE NR 2 ENGINE FIRE WARNING LIGHT ACTIVATED. BOTH A AND B NACELLE TEMPERATURES AT 9 DEGREES AND RISING, NR 2 GENERATOR FIELD AND PRESSURE LIGHTS INCLUDING GROUND BRAKER LIGHT CAME ON. CREW ACCOMPLISHED ENGINE SHUTDOWN, FIRED BOTTLE, AND RETURNED TO HNL. FOUND NR 2 CSD OIL COOLER LEAKING. REPLACED THE OIL COOLER AND VISUALLY CHECKED FOR LEAKS, NO LEAKS FOUND. AIRCRAFT RETURNED TO SERVICE.

Part: ACTUATOR — LEAKING (RT BODY GEAR)

DURING DESCENT, THE NR 1 HYDRAULIC SYSTEM FAILED. ALSO, ALTERNATE ELECTRICAL SYSTEM FAILED TO OPERATE FLAPS. CREW LANDED AIRCRAFT WITH OUTBOARD FLAPS AT 25 DEGREES AND INBOARD AT 10 DEGREES. FLIGHT LANDED WITHOUT INCIDENT AND WAS TOWED TO GATE. FOUND LEAKING DOWNLOCK ACTUATOR ON RIGHT BODY GEAR. REPLACED UNIT AND CHECK WAS NORMAL.

Part: ENGINE — FLAMED-OUT (NR 4)

DURING CRUISE, THE NR 4 ENGINE FLAMED-OUT. RELIGHT WAS OK AND THE REMAINDER OF THE FLIGHT WAS UNEVENTFUL. FUEL PRESSURE CHECKED OK AND THE FUEL FILTER WAS REPLACED. GROUND RUNUP CONFIRMED PROPER ENGINE OPERATION.

Part: CADC — MALFUNCTIONED (E/E BAY)

AFTER TAKEOFF, THE NR 1 AND NR 3 INS FAILED. CREW FOLLOWED COCKPIT OPERATING MANUAL AND RETURNED TO NRT. MAINTENANCE REPLACED NR 1 CADC AND PERFORMED BITE AND LEAK CHECK. SYSTEM CHECKED NORMAL. AIRCRAFT RETURNED TO SERVICE.

Part: TR UNIT — INOPERATIVE (NR 4 ENGINE)

DURING LANDING ROLLOUT, THE NR 4 ENGINE REMAINED IN REVERSE RESULTING IN A COMPRESSOR STALL AND OVERTEMP. THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT TAXIED TO THE GATE. FOUND NR 4 THRUST REVERSER DRIVE UNIT INOPERATIVE. LOCKED OUT NR 4 THRUST REVERSER, BORESCOPED NR 4 ENGINE, AND PERFORMED ENGINE RUN. AIRCRAFT RETURNED TO SERVICE.