N987US

Part: TRIM SYSTEM — MALFUNCTIONED · airframe 92,214 hrs · 70,420 cycles

CREW DETERMINED THAT THE PRIMARY TRIM CONTROL WAS INTERMITTENTLY INOPERATIVE IN BOTH NOSE UP AND NOSE DOWN DIRECTIONS. THIS WAS TRUE FROM BOTH THE CAPTAINS AND FIRST OFFICERS POSITION. THE ALTERNATE TRIM FUNCTIONED OK. NO MENTION OF COM COMPLIANCE EXCEPT FOR THE NOTE THAT THE CREW DID NOT TROUBLESHOOT THE SUITCASE HANDLES. THE FLIGHT RETURNED TO A NORMAL SAFE LANDING BACK AT MSP. MX COULD NOT FIND ANY PROBLEMS OR FAILURES BUT DID CHANGE THE PRIMARY DRIVE MOTOR (SECOND ONE IN 2 DAYS) AND ALSO REPLACED THE BRAKE OVERRIDE SWITCH.

Part: SKIN — CRACKED (BS 1059 L18L) · airframe 92,009 hrs · 70,258 cycles

DURING OVERNIGHT CHECK FOUND CRACK IN AFT LT FUSELAGE SKIN AT BS 1059 ABOVE L18. REPAIRED PER EA 99-214064 SECT I. SECTION II REQUIRES A BOEING DAMAGE TOLERANCE ANALYSIS AND INSPECTION NO LATER THAN 10/11/10.

Part: WIRE — BURNED (TAXI LIGHT) · airframe 91,133 hrs · 69,509 cycles

ON APPROACH FOR LANDING AT IAD, THE PILOTS DETECTED A VERY STRONG ELECTRICAL HOT ODOR CIRCULATING THE COCKPIT. APPROACH AND LANDING CONTINUED WITHOUT ANY FURTHER INCIDENT. CREW STATED THE ODOR DISSIPATED WHEN TAXIING TO THE GATE. MAINTENANCE FOUND THE NOSE TAXI LIGHT SWITCH HAS A BURNED WIRE END LUG DUE TO A LOOSE TERMINAL. THE SWITCH WAS REPLACED, THE DAMAGED WIRE WAS REPAIRED, AND TERMINALS WERE VERIFIED SECURE. OPERATIONAL CHECKS WERE GOOD.

Part: LINE — LEAKING (HYD SYSTEM) · airframe 89,381 hrs · 68,129 cycles

AS THE AIRCRAFT CLIMBED AFTER DEPARTING DFW, THE CREW NOTICED THE LOSS OF FLUID QUANTITY AND PRESSURE FROM THE RIGHT HYDRAULIC SYSTEM. COM PROCEDURES WERE COMPLIED WITH AND THE AIRCRAFT CONTINUED TO SCHEDULED DESTINATION. AFTER LANDING UNEVENTFULLY THE LANDING GEAR WAS PINNED AND THE AIRCRAFT WAS TOWED TO THE GATE. MAINTENANCE FOUND FLUID LEAKING FROM A LINE COMING OUT OF THE AUXILIARY PUMP. ELECTRICAL WIRES HAD CHAFED BOTH THE WIRES AND THE LINE TO FAILURE. THE WIRE HARNESS, THE AUX PUMP, THE ENGINE PUMP, AND FILTERS WERE ALL REPLACED. LEAK CHECK WAS GOOD AND THE AIRCRAFT HAS RETURNED TO SERVICE.

Part: PUMP — FAILED (NR 1 ENGINE) · airframe 88,248 hrs · 67,273 cycles

DURING TAKEOFF NR 1 ENGINE FLAMED OUT. THE FLIGHT RETURNED TO GPT AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE FUEL PUMP SHAFT HAD SHEARED. REMOVED AND REPLACED THE FUEL PUMP, TESTED ENGINE AND RETURNED TO SERVICE.

Part: ENGINE — MAKING METAL (NR 2) · airframe 82,054 hrs · 62,583 cycles

DURING CRUISE FLIGHT, NR 2 ENGINE OIL QUANTITY WENT TO ZERO, OIL TEMP CLIMBED INTO THE RED ZONE. THE NR 2 ENGINE WAS SHUT DOWN. FLIGHT CREW DIVERTED AIRCRAFT TO MBS AND PERFORMED AN UNEVENTFUL LANDING. MAINTENANCE FOUND METAL IN THE OIL FILTER AND ON THE CHIP DETECTORS. REPLACED THE NR 2 ENGINE.

Part: SMOKE — DETECTED (CABIN) · airframe 79,713 hrs · 60,932 cycles

DURING CLIMB, SMOKE WAS NOTICED IN THE CABIN. SMOKE DISSIPATED AFTER TURNING OFF WING AND ENGINE ANTI-ICE. RETURNED AIRCRAFT TO DEPARTURE AIRPORT AND MADE AN UNEVENTFUL LANDING. MAINTENANCE PURGED THE AC SYSTEM AND REPLACED THE COALESCER BAGS. OPERATIONAL CHECK OK.

airframe 79,712 hrs · 60,931 cycles

DURING CLIMB, FLIGHT ATTENDANT REPORTED THE LEFT AFT LAV SMOKE ALARM SOUNDING AND BURNING SMELL IN CABIN. SMELL CLEARED BUT LAV ALARM CONTINUED UNTIL RESET. FLIGHT CONTINUED TO DESTINATION. MAINTENANCE REPLACED THE APU. OPERATIONAL CHECK OK.

Part: FLOORBEAM — CRACKED (FUSELAGE) · airframe 74,080 hrs · 57,302 cycles

SUBFLOOR CRACKED AT LIGHTENING HOLE STA 756 - 775 LT CUSP AREA. REPAIRED PER EA 99-172523 AND SRM 51-30-2,5. L/P 1449708.

Part: BATTERIES — DISCHARGED (COCKPIT)

DURING LINE MAINTENANCE INSPECTION, FOUND OVERHEAD EMERGENCY LIGHTS IN COCKPIT, FORWARD GALLEY, AND ENTRANCE WAY ALL INOPERATIVE. REPLACED BATTERIES, OPERATIONAL CHECK NORMAL.

Part: SCHRADER VALVE — FAILED (NLG STRUT)

GROUND SHIFT FAILURE OCCURRED AFTER TAKEOFF FROM DTW. AIRCRAFT WOULD NOT PRESSURIZE, ANTI-ICE WAS INOPERATIVE AND SLATS WOULD NOT RETRACT. CABIN ALTITUDE REACHED 15,000 FEET AND, OXYGEN MASKS WERE DEPLOYED THROUGHOUT CABIN. FLIGHT WAS DIVERTED TO MKE AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND NOSE LANDING GEAR STRUT FLAT. REPLACED SCHRADER VALVE AND SERVICED NOSE STRUT TO PROPER LEVELS. AIRCRAFT RETURNED TO SERVICE.

Part: LAMP — FAILED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY LIGHT IN AFT CEILING PANEL BETWEEN LAVATORIES INOPERATIVE. MAINTENANCE RELAMPED LIGHT, OPERATIONAL CHECK OK.

Part: BATTERY PACK — DISCHARGED (CABIN)

CABIN EMERGENCY PATHWAY LIGHTS ILLUMINATED DURING TAKEOFF ROLL AND REMAINED ON UNTIL CRUISE, THEN EXTINGUISHED. FOUND BAD SPLICE AT GROUND WIRE AND CHAFING IN OVERHEAD CEILING BETWEEN LAVATORIES. REPLACED SPLICE AND REPAIRED WIRING. ALSO REPLACED FORWARD RIGHT EMERGENCY EXIT AND OVERHEAD INTERIOR BATTERY PACKS AND ALL BATTERIES TO OVERWING EXITS AND AFT ENTRY DOOR. OPERATIONAL CHECK NORMAL.

Part: BATTERY — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND AFT FLASHLIGHT AT AFT CABIN DOOR INOPERATIVE. REPLACED BATTERY, OPERATIONAL CHECK NORMAL.

Part: POWER SUPPLY — INOPERATIVE (TAIL COMP EM LTS)

DURING LINE MAINTENANCE INSPECTION, FOUND FLOOR PROXIMITY EMERGENCY LIGHTS IN TAIL COMPARTMENT INOPERATIVE. REPLACED POWER SUPPLY, OPERATIONAL CHECK NORMAL.

Part: DUCT — RUPTURED (LEFT)

TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED AFTER TAKEOFF. FLIGHT WAS RETURNED TO MEM AND LANDED WITHOUT INCIDENT. MAINTENANCE TIGHTENED CLAMPS AT LEFT AIR CONDITIONING SYSTEM BETWEEN PRESSURE RELIEF SHUT OFF VALVE AND FLOW CONTROL VALVE. ALSO, REPLACED RUPTURED DUCT DOWNSTREAM OF FLOW CONTROL VALVE, OPEATIONAL CHECK NORMAL.

Part: INTERCOSTAL — CRACKED (BS 942)

DURING M-CHECK, FOUND A CRACK IN LOUVER SUPPORT INTERCOSTALS FS 942. REPAIRED PER EA 99-113313.

Part: BULKHEAD WEB — CORRODED (BS 966)

DURING M-CHECK, FOUND CORROSION ON AFT PRESSURE BULKHEAD SUPPORT WEB FS 966. REPAIRED PER EA 99-112992.

Part: SKIN — CORRODED (BS 370-427)

DURING M-CHECK, FOUND CORROSION ON FUSELAGE SKIN AT FORWARD CARGO FS 370 TO 427. REPAIRED PER EA 99-112918.

Part: INTERCOSTAL — CRACKED (BS 579)

DURING M-CHECK, FOUND A CRACK IN INTERCOSTAL AT FS 579, LONGERON 27L TO 28L. REPAIRED PER EA 99-112976.

Part: SUPPORT — CORRODED (BS 218-303)

DURING M-CHECK, FOUND CORROSION ON CABIN FLOOR SUPPORT CAP (P/N 5910137-9 AND 5910137-17) FS 219 TO 303. REPAIRED PER EA 99-112984.

Part: BULKHEAD — CRACKED (BS 110)

DURING M-CHECK, FOUND SEVERAL CRACKS IN NOSE LANDING GEAR WHEEL WELL HORIZONTAL PRESSURE BULKHEAD FS 110. REPAIRED PER EA 99-112947.

Part: FITTING — CRACKED (BS 996)

DURING M-CHECK, FOUND CRACK IN LONGERON 23R END FITTING FS 996. REPLACED FITTING PER SRM 51-30-2.

Part: EPR TRANSMITTER — MALFUNCTIONED (RT ENGINE)

AS TAKEOFF POWER WAS APPLIED, THE RIGHT ENGINE EPR INDICATION WOULD NOT REACH TARGET EPR. CREW ABORTED TAKEOFF AND RETURNED TO GATE. MAINTENANCE REPLACED THE RIGHT ENGINE EPR TRANSMITTER AND INDICATOR. OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.

Part: PANELS — LEAKING FUEL (LT WING)

EN ROUTE HOU-DTW, A FUEL IMBALANCE WAS INDICATED ON GAUGES WITH UNMATCHED FUEL BURN VERSUS FUEL REMAINING. FLIGHT DIVERTED TO MEM AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND PANELS ON TOP OF LEFT WING, LEAKING FUEL. TIGHTENED PANELS. AIRCRAFT RETURNED TO SERVICE.

Part: POWER SUPPLY — INOPERATIVE (RT NACELLE)

DURING LINE MAINTENANCE INSPECTION, FOUND THE RIGHT NACELLE EMERGENCY LIGHT INOPERATIVE. REPLACED POWER SUPPLY, OPERATIONAL CHECK NORMAL.

Part: BATTERY PACKS — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND TAIL COMPARTMENT EMERGENCY LIGHTS INOPERATIVE. REPLACED POWER SUPPLY AND BATTERY PACKS. OPERATIONAL CHECK NORMAL.

Part: COMPRESSOR — STALLED (ENGINE)

DURING TAKEOFF ROLL, ONE OR MORE ENGINES EXPERIENCED COMPRESSOR STALLS. CREW ABORTED TAKEOFF AND RETURNED TO THE GATE. MAINTENANCE INSPECTED BOTH ENGINES, PERFORMED OPERATIONAL CHECK AND CHECKED OK. COULD NOT DUPLICATE STALLS.

Part: BATTERY — CONTAMINATED (CABIN)

DURING LINE CHECK, FOUND THAT THE EMERGENCY SEAT LIGHTS WERE INOPERATIVE. FOUND THE TAILCONE EMERGENCY BATTERY PACK FILLED WITH DE-ICING FLUID. REPLACED THE BATTERY PACK, CHECKED OK.

Part: LATCH ARM — WORN (TAILCONE)

DURING LINE CHECK, FOUND THAT EXCESSIVE FORCE WAS REQUIRED TO PULL THE EXTERIOR TAILCONE HANDLE FROM THE CLIPS. ALSO, FOUND A WORN UPPER LEFT LATCH ARM AND AN INCORRECT LOWER RIGHT LATCH HOUSING. ADJUSTED THE CLIPS AND REPLACED THE LATCH ARM AND LATCH HOUSING.

Part: BATTERIES — DISCHARGED (TAILCONE)

DURING LINE MAINTENANCE INSPECTION, FOUND TAIL COMPARTMENT EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERIES. OPERATIONAL CHECK NORMAL.

Part: OVERHEAT SENSOR — FAILED (TAIL COMPT)

TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED DURING CLIMBOUT. FLIGHT RETURNED TO SLC AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED BOTH THE LEFT AND RIGHT TAIL COMPARTMENT OVERHEAT SENSORS AND RIGHT CHECK VALVE. OPERATIONAL CHECK NORMAL.

Part: EEL WIRE — BROKEN (CABIN)

DURING LINE CHECK, FOUND FLOOR EMERGENCY LIGHTS INOPERATIVE IN AFT CABIN. REPAIRED WIRE AND OPERATIONAL CHECK GOOD.

Part: EEL POWER SUPPLY — MALFUNCTIONED (LT NACELLE)

DURING LINE CHECK, FOUND LEFT NACELLE EMERGENCY LIGHT INOPERATIVE. REPLACED POWER SUPPLY AND BATTERY, OPERATIONAL CHECK GOOD.

Part: COMPRESSOR — STALLED (ENGINE)

FLIGHT EXPERIENCED A COMPRESSOR STALL ON TAKEOFF ROLL (ENGINE POSITION UNDETERMINED). THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED BOTH ENGINES AND FOUND NO DISCREPANCIES. SUSPECT THIS EVENT WAS DUE TO SNOW AND SLUSH INGESTION.