N751NW

Part: DUCT — RUPTURED (FUEL DEICE) · airframe 90,519 hrs · 81,469 cycles

DURING CLIMB ENGINE FIRE INDICATION FOR THE NR 1 ENGINE ENUNCIATED. FLIGHT CREW COMPLIED WITH COM, FIRE EXTINGUISHER WAS ACTIVATED AND THE NR 1 ENGINE WAS SHUT DOWN. FLIGHT CREW RETURNED AIRCRAFT TO DEPARTURE AIRPORT PERFORMING AN UNEVENTFUL LANDING. MAINTENANCE FOUND A RUPTURED 13TH STAGE FUEL DE-ICE DUCT/AIR MANIFOLD AND REPLACED IT. ENGINE RUN AND FUNCTIONAL CHECKS GOOD.

Part: BULKHEAD — CRACKED (FUSELAGE) · airframe 89,963 hrs · 81,011 cycles

DURING OVERNIGHT CHECK VISIT FOR REPEAT INSPECTIONS PER SB 53-264, FOUND CRACK INDICATION ON LT AFT PRESSURE BULKHEAD WEB STATION Z=63.5 AT OUTBOARD EDGE OF DOOR CUTOUT. REPAIRED PER EA 97-215767 SECT I SECTION II PERMANENT REPAIR TO BE ACCOMPLISHED PRIOR TO NOVEMBER 30, 2009 OR 1500 CYCLES.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHT) · airframe 88,419 hrs · 79,559 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 13-15 OF THE CABIN WERE INOPERATIVE. MAINTENANCE FOUND IMPROPER INSTALLATION OF THE BATTERIES. BATTERIES HAD BEEN INSTALLED BACKWARDS. REINSTALLED BATTERIES AND OPERATIONAL CHECK WAS GOOD. (A)

Part: WIRE — DISCONNECTED (EMERGENCY LIGHTS) · airframe 88,142 hrs · 79,332 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING FOR ROWS 5, 6, 7, 8, 14, AND 17 WERE FOUND TO BE INOPERATIVE. MAINTENANCE FOUND A DISCONNECTED WIRE AND RE-INSERTED IN THE CONNECTOR. THE AIRCRAFT RETURNED TO SERVICE.

Part: OIL SYSTEM — OVERSERVICED (APU) · airframe 88,087 hrs · 79,288 cycles

THE FLIGHT ATTENDANT AND PASSENGER BOTH REPORTED A BURNING ODOR IN THE CABIN. FLIGHT CONTINUED AS SCHEDULED AND LANDED AT MEM WITHOUT INCIDENT. MAINTENANCE INSPECTED EVERY POSSIBLE SOURCE OF FUMES ABOARD THE AIRCRAFT AND FOUND THE APU OIL OVER SERVICED. OIL WAS DRAINED FROM THE APU, BOTH OF THE PACKS UNDERWENT BURNOUT PROCEDURES AND IT WAS DETERMINED THEN THAT "THE LT PACK WAS CAUSING THE SMOKE". BURNOUT PROCEDURES REPEATED, BOTH COALESCER BAGS REPLACED, AND A FUNCTIONAL CHECK PERFORMED. NO SMOKE OR ODOR EXPERIENCED AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: ACM — ODOR (LEFT) · airframe 87,908 hrs · 79,134 cycles

ON FINAL APPROACH INTO MSP, ODOR OF SMOKE FILLED THE AFT CABIN SECTION. THE AFT LAVATORY SMOKE DETECTOR WENT INTO ALARM AND ILLUMINATED THE WARNING INDICATOR IN THE COCKPIT. ALL OTHER INDICATIONS WERE NORMAL INCLUDING ALL THE PACKS. FLIGHT CREW REQUESTED THAT EMERGENCY VEHICLES MEET THE AIRCRAFT AFTER LANDING. FLIGHT LANDED WITHOUT INCIDENT AND THE SMOKE DISSIPATED AFTER TOUCHDOWN. MAINTENANCE FOUND EVIDENCE OF OIL IN THE LEFT COALESCER BAG AND DETERMINED THE SOURCE TO BE THE LEFT AIR CYCLE MACHINE. THE ACM WAS REPLACED; PACK BURNOUT PROCEDURES COMPLIED WITH, AND A FINAL WATER SOCK REPLACEMENT PRIOR TO THE AIRCRAFT RETURNING TO SERVICE.

Part: YAW DAMPER — MALFUNCTIONED (RUDDER) · airframe 86,741 hrs · 78,123 cycles

IN LEVEL FLIGHT AT 12,000 FT AND 250 KNOTS WITH AUTOPILOT OFF, THE PILOT IN COMMAND EXPERIENCED UNRESPONSIVE RUDDER CONTROL. THE CAPTAIN REQUESTED THE FIRST OFFICER ATTEMPT CONTROL AND HE DID HAVE EFFECTIVE RUDDER CONTROL. THE CAPTAIN RETRIED CONTROL OF THE RUDDER AND IT RESPONDED PROPERLY. NO APPLICABLE COM PROCEDURES TO COMPLY WITH. THE AIRCRAFT LANDED NORMALLY AND SAFELY AT SCHEDULED DESTINATION. MAINTENANCE REPLACED THE YAW DAMPENER ACTUATOR, HYDRAULIC POWER RUDDER ACTUATOR, AND THE AUTOPILOT STAB-AUG COMPUTER. FUNCTIONAL CHECKS WERE GOOD AND THE AIRCRAFT HAS RETURNED TO SERVICE.

Part: WEB — CRACKED (RT PYLON) · airframe 86,416 hrs · 77,856 cycles

DURING SCHEDULED ENGINE CHANGE, FOUND CRACK IN LOWER EDGE OF RT PYLON CLOSURE WEB LIGHTENING HOLE AT STA YN 164. REPAIRED PER EA 97-208937.

Part: FCU — MALFUNCTIONED (NR 1 ENGINE) · airframe 86,160 hrs · 77,652 cycles

DURING DESCENT, AT 14,000 FT, NR 1 ENGINE FLAMED OUT. THE FLIGHT CREW DECLARED AN EMERGENCY AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE FUEL PUMP SHAFT SHEARED. THE FUEL PUMP AND FCU WERE REPLACED, THE ENGINE TRIMMED, TESTED AND RETURNED TO SERVICE.

Part: FORMER — CRACKED · airframe 75,115 hrs · 67,953 cycles

During Inspection in CMH a crack was found in the -45 former. The crack extended from the O/B most fastener hole. Repaired per EA 97-181291.

Part: WIRE — SHORTED (CABIN) · airframe 73,471 hrs · 66,598 cycles

DURING PREFLIGHT CHECK, FOUND EMERGENCY LIGHTS CHARGER CIRCUIT BREAKER TRIPPED. RESET CIRCUIT BREAKER AND IT TRIPPED AGAIN. REPLACED A WIRE SHORTING TO GROUND. OPERATIONAL CHECK NORMAL.

Part: TRACK — BROKEN (RT LE FLAP)

SLAT DISAGREEMENT OCCURRED ON LANDING INTO MSP, CREW REQUESTED EMERGENCY EQUIPMENT ON STANDBY AND AIRCRAFT LANDED WITHOUT INCIDENT USING FLAPS ONLY. MAINTENANCE FOUND CRACK IN NR 1 RIGHT SLAT DRIVE TRACK AND DAMAGE TO RETRACT CABLE. REPLACED TRACK AND CABLE. ALSO, RIGGED ANTI-ICE T DUCT. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.

Part: ACM — INOPERATIVE (TAIL SECTION)

DURING CLIMB-OUT, THE FLIGHT CREW REPORTED AN AERIAL TYPE SMELL COMING FROM THE GALLEY AREA. FLIGHT CREW PERFORMED ON AIR CONDITIONING SMOKE PROCEDURE, DECLARED A YELLOW EMERGENCY, DIVERTED FLIGHT TO RST, AND LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED AN EXTENSIVE INSPECTION OF THE AIRCRAFT AND REPLACED THE LEFT AIR CYCLE MACHINE AND COALESCER BAG. OPERATIONAL CHECK NORMAL.

Part: PRESS SWITCH — ERRATIC (WING ANTI-ICE)

DURING CLIMB-OUT FROM DTW, AIRFOIL ICE PROTECTION PRESSURE ABNORMAL LIGHT ILLUMINATED UPON SELECTION OF WING ANTI-ICE. FLIGHT WAS DIVERTED TO IND AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED WING ICE PROTECTION AIR PRESSURE SWITCH. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.

Part: BATTERY PACK — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND WING/NACELLE EMERGENCY LIGHTING INOPERATIVE. MAINTENANCE REPLACED RELAY R2-213, BATTERY PACKS AND RELAMPED LIGHTS, OPERATIONAL CHECK NORMAL.

Part: WIRE — LOOSE (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND MID CABIN OVERHEAD EMERGENCY LIGHT INOPERATIVE. TIGHTENED LOOSE WIRE AT BATTERY PACK, OPERATIONAL CHECK NORMAL.

Part: CONTROL CABLE — OUT OF ADJ (NLG)

DURING CLIMB-OUT, THE AUTO SPOILER DO NOT USE INDICATION ILLUMINATED AND THE AUTOMATIC PRESSURIZATION CONTROL BECAME INOPERATIVE AFTER LANDING GEAR RETRACTION. THE FLIGHT CREW FOLLOWED GROUND SHIFT FAILRUE PROCEDURES IN COM. DIVERTED TO ORD AND LANDED WITHOUT INCIDENT. MAINTENANCE RIGGED THE GROUND SHIFT CABLES. OPERATIONAL CHECK OK.

Part: POWER SUPPLY — INOPERATIVE (CABIN)

DURING LINE CHECK, FOUND LEFT OVERWING DOOR EMERGENCY LIGHT INOPERATIVE. REPLACED POWER SUPPLY AND BATTERIES B5-32. OPERATIONAL CHECK OK.

Part: STRUT — REQD SERVICE (NLG)

AFTER TAKEOFF FROM FAR, UNABLE TO RETRACT GEAR. NOSE GEAR STEERABLE. FLIGHT RETURNED TO FAR AND LANDED WITHOUT INCIDENT. FOUND NOSE GEAR STRUT FLAT. REPACKED NOSE STRUT AND RESERVICED. GEAR OPERATION WAS CHECKED SEVERAL TIMES AND OPERATED NORMALLY.

Part: TERMINAL — BROKEN (PITOT HEAT)

PITOT HEAT OFF LIGHT REMAINED ILLUMINATED CONTINUOUSLY FOR FIFTEEN MINUTES THEN STARTED TO FLICKER. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND TERMINAL AT S3-83 BROKEN OFF. REPAIRED TERMINAL, SYSTEM OPERATIONAL CHECK OK.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY LIGHTS INOPERATIVE ON FIRST CLASS FLOOR TRACK. REPLACED BATTERIES IN BATTERY PACKS. OPERATIONAL CHECK OK.

Part: ANGLE — CRACKED (FS 1171)

DURING H-CHECK, FOUND A TWO INCH CRACK IN THE RIGHT SIDE DORSAL FIN ATTACH ANGLE FS 1171. REPAIRED ANGLE (P/N 5912141-60) PER EA 97-109496.

Part: FITTING — CORRODED (FS 794)

DURING H-CHECK, FOUND CORROSION ON THE LONGERON 30 END FITTING AT FS 794. REPLACED FITTING (P/N 5924878-505) PER EA 97-109495.

Part: ACT FITTING — CRACKED (RT MLG DOOR)

DURING H-CHECK, FOUND A TWO INCH CRACK IN THE RIGHT MAIN LANDING GEAR INBOARD DOOR RETURN CYLINDER SUPPORT FITTING AT THE KEEL. REPLACED FITTING PER SRM 51-30-5.

Part: LATCH FITTING — CRACKED (PAX DOOR)

DURING H-CHECK, FOUND A CRACK IN THE AFT ENTRY DOOR UPPER LATCH FITTING. REPLACED FITTING PER SRM 51-30-2.

Part: FLOOR BEAM — CORRODED (FS 1041)

DURING H-CHECK, FOUND CORROSION ON THE FS 1041 FLOOR BEAM AT APPROXIMATELY LBL 18. REPAIRED BEAM (P/N 9958212-3) PER EA 97-109477.

Part: FLOOR BEAM — CORRODED (FS 1056)

DURING H-CHECK, FOUND CORROSION ON THE FS 1056 FLOOR BEAM AT APPROXIMATELY LBL 26 AND RBL 34. REPAIRED BEAM (P/N 9958187-1) PER EA 97-109476.

Part: FITTING — CRACKED (PAX DOOR)

DURING H-CHECK, FOUND CRACKS IN THE AFT ENTRY DOOR BEAM RIGHT SIDE END FITITNGS; NR 1 UPPER, NR 3 UPPER AND LOWER AND NR 4 UPPER. REPLACED ALL FITTINGS PER SRM 51-00.

Part: FITTING — CORRODED (FS 1072)

DURING H-CHECK, FOUND CORROSION ON THE LONGERON 28L END FITTING AT FS 1072. REPLACED FITTING PER SRM 51-30-2 AND 51-30-5.

Part: FITTING — CORRODED (FS 984)

DURING H-CHECK, FOUND CORROSION ON THE FS 984 FRAME FITTING AT THE RIGHT CUSP. REPLACED FITTING PER SRM 51-30-5 AND 51-30-1.

Part: WIRE — BROKEN (CABIN)

DURING LINE CHECK, FOUND EMERGENCY PATH LIGHTS INOPERATIVE FROM ROW 6 TO 13. REPAIRED BROKEN WIRE AND OPERATIONAL CHECK GOOD.

Part: ACTUATOR — LEAKING (LT MLG)

LOSS OF RIGHT HYDRAULIC SYSTEM OCCURRED DURING APPROACH INTO MSP. EMERGENCY GEAR EXTENSION PROCEDURES WERE UTILIZED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. FOUND RIGHT HYDRAULIC FILTER HOUSING AND LEFT MAIN GEAR ACTUATOR LEAKING. REPLACED FILTER HOUSING AND ACTUATOR. ALSO, REPLACED LEFT AND RIGHT MAIN GEAR DOOR SKID PLATES AND LEFT BUNGEE CYLINDER DUE TO DAMAGE INCURRED ON LANDING. OPERATIONAL CHECK GOOD AND AIRCRAFT RETURNED TO SERVICE.

Part: STRUT — DEFLATED (NLG)

NOSE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF DUE TO GROUND SHIFT FAILURE. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. REPACKED NOSE GEAR STRUT AND SERVICED TO PROPER LEVELS. OPERATIONAL CHECK NORMAL AND AIRCRAFT RETURNED TO SERVICE.

Part: BATTERY PACK — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY LIGHTS AT SEVERAL ROWS INOPERATIVE. REPLACED THREE SETS OF BATTERY PACKS, OPERATIONAL CHECK GOOD.

Part: SKIN — CRACKED (RT ELEVATOR)

DURING B-CHECK, FOUND TWO, 2 INCH CRACKS IN THE RIGHT ELEVATOR LOWER SKIN AT STA 658. REPAIRED PER EA 97-102591.

Part: INDICATION — MALFUNCTIONED (LANDING GEAR)

DURING CLIMBOUT FROM DTW, ALL THREE LANDING GEAR RED UNSAFE LIGHTS AND DOOR OPEN LIGHT REMAINED ON AFTER GEAR WAS RETRACTED. RECYCLED GEAR HANDLE AND ALL INDICATIONS WERE NORMAL. FLIGHT CONTINUED TO DESTINATION (CMH) AND LANDED WITHOUT INCIDENT. INSPECTED GEAR AND DOOR SWITCHES AND CONNECTORS. ALL CHECKED OK. DISCREPANCY COULD NOT BE DUPLICATED. AIRCRAFT RETURNED TO SERVICE.

Part: SWITCHES — MALFUNCTIONED (SLATS)

STALL INDICATION FAILURE LIGHT AND STICK SHAKER ACTIVATED DURING SLAT RETRACTION AFTER TAKEOFF. FLIGHT RETURNED TO MEM AND LANDED WITHOUT INCIDENT. REPLACED SLAT EXTEND SWITCHES. OPERATIONAL CHECK OK ON GROUND. AIRCRAFT RETURNED TO SERVICE.

Part: UPLIMIT SWITCH — MALFUNCTIONED (NLG)

NOSE LANDING GEAR UNSAFE LIGHT REMAINED ON AFTER GEAR RETRACTION DURING CLIMB-OUT. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. REPLACED THE NOSE GEAR UPLIMIT SWITCH. OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.