N752NW

Part: FUSE — FAILED (EEL POWER SUPPLY) · airframe 89,206 hrs · 80,733 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING ON THE RIGHT HAND SIDE OF THE FIRST CLASS SECTION OF THE CABIN HAD FAILED. MAINTENANCE REPLACED THE ASSOCIATED FUSE IN THE POWER SUPPLY AT DOOR 1R. OPS CHECK WAS GOOD.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHTS) · airframe 87,225 hrs · 78,898 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 12 THROUGH 15 OF COACH SEATS IN THE CABIN HAD FAILED. MAINTENANCE REPLACED THE EMERGENCY PATHWAY LIGHT POWER SUPPLY AT THE OVERWING EXIT. INSTALLED NEW BATTERIES AND OPERATIONALLY CHECKED THE SYSTEM.

Part: SKIN — CRACKED (FUSELAGE) · airframe 86,454 hrs · 78,234 cycles

DURING "M" CHECK, FOUND CRACK IN FUSELAGE SKIN AT THE AFT LOWER CORNER OF FORWARD CARGO DOOR JAMB. REPAIRED PER EA 97-210194.

Part: RESERVOIR — LEAKING (HYD SYSTEM) · airframe 85,329 hrs · 77,281 cycles

THE RIGHT HYDRAULIC SYSTEM HAD DROPPED TO ABOUT TWO QUARTS WHILE IN CRUISE FLIGHT. AS THE AIRCRAFT WAS ON APPROACH FOR LANDING AND THE LANDING GEAR WAS EXTENDED THE RIGHT SYSTEM WENT TO ZERO. THE LANDING GEAR DID LOCK DOWN AND ALL SAFE INDICATIONS ILLUMINATED. COM PROCEDURES WERE COMPLIED WITH AND THE LANDING WAS UNEVENTFUL. MAINTENANCE FOUND THE RESERVOIR RELIEF VALVE STUCK IN THE OPEN POSITION. THE RESERVOIR WAS REPLACED ALONG WITH THE AUX PUMP, ENGINE DRIVEN PUMP AND SYSTEM FILTERS. AFTER A SATISFACTORY LEAK CHECK THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: BOOT — TORN (A/C BAY) · airframe 76,097 hrs · 69,167 cycles

WHILE CRUISING AT FL240, THE AIRCRAFT EXPERIENCED A LOSS OF CABIN PRESSURIZATION. WING AND ENGINE ANTI-ICE PROTECTION WERE ON. COMPLIED WITH COM PROCEDURES WITH NO HELP. CREW ACCOMPLISHED AN EMERGENCY DESCENT TO 10,000 FEET AND CONTINUED TO DESTINATION. RIGHT AIR CONDITION SUPPLY HIGH AND AIRFOIL ICE PROTECTION PRESSURE ABNORMAL ANNUNCIATORS DID ILLUMINATE ON FINAL APPROACH. LANDING WAS UNEVENTFUL AT OMA. MAINTENANCE FOUND THE RAM AIR DUCTING AFT OF THE HEAT EXCHANGER WORN THROUGH, THE RIGHT SIDE FLEXIBLE BOOT FROM THE -Y- DUCT WAS TORN. BOOT WAS REPLACED AND SOME WORN WIRES FROM THE CANNON PLUG ON THE RIGHT ACM WERE REPAIRED. STINGER CHECK OK.

Part: SEAL — DAMAGED (L/E SLAT) · airframe 75,624 hrs · 68,770 cycles

AIRCRAFT ROLLS SHARPLY TO THE LEFT WHEN SLAT EXTENDED. A LOUD BANG WAS HEARD AFTER 5 DEGREES OF FLAP SELECTED AND ROLLING MOVEMENT STOPPED. THERE WERE NO ABNORMAL ANNUNCIATOR INDICATIONS. THE FLIGHT LANDED SAFELY AT DTW. MAINTENANCE STATED THAT SLAT EXTENSION APPEARED NORMAL BUT SLAT RETRACTION WAS SLOW AND JERKY. ALL TRACKS AND TRACK DOORS ARE NORMAL. ALIGNMENT CHECK APPEARS NORMAL. THE RIGHT T-DUCT BINDS ON RETRACTION AND THE INBOARD RIGHT SLAT SEAL WAS FOUND TO BE BADLY DAMAGED AND WAS REPLACED. THE AIRCRAFT RETURNED TO SERVICE.

Part: BATTERY PACK — INOPERATIVE (CABIN) · airframe 72,978 hrs · 66,554 cycles

DURING LINE CHECK, FOUND ALL EMERGENCY LIGHTING, TRACK LIGHTS IN TAIL COMPARTMENT, ALL EXIT SIGNS, AND NACELLE LIGHTS INOPERATIVE. MAINTENANCE REPLACED THE CABIN EMERGENCY LIGHT BATTERY PACKS. OPERATIONAL CHECK NORMAL.

Part: BULKHEAD WEB — CRACKED (AFT PRESS BLKHD)

DURING PERIODIC CHECK, FOUND AFT PRESSURE BULKHEAD WEB CRACKED AT RIGHT SIDE DOOR BELOW NR 2 RIB. CRACK EXTENDS .5 INCHES OUT FROM SCREW. REPAIRED PER EA 97-163442.

Part: BULKHEAD — CRACKED (BS 1072)

DURING PERIODIC CHECK, FOUND CRACKS AT FS 1072 VENTRAL DOOR LOCATIONS AT LOWER RIGHT CORNER .375 INCHES IN LENGTH AND FORWARD TOP LEFT CORNER. REPAIRED PER EA 97-163523.

Part: AIR DUCTS — FAILED (TAIL COMPT)

DURING CLIMBOUT, THE TAIL COMPARTMENT OVERHEAT LIGHT ILLUMINATED. FLIGHT CREW FOLLOWED COM PROCEDURES, RETURNED TO BNA, AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE FOLLOWING LEFT SIDE COMPONENTS: THE 8TH AND 13TH STAGE AIR DUCTS, CROSSFEED VALVE, AUGMENTATION VALVE, PRESSURE REGULATING AND SHUTOFF VALVE, AND FLOW CONTROL VALVE AND DUCT. OPERATIONAL CHECK NORMAL.

Part: SENSOR — INOPERATIVE (TAIL COMPT)

DURING CLIMB-OUT, THE TAIL COMPARTMENT HIGH TEMPERATURE LIGHT ILLUMINATED. FLIGHT CREW FOLLOWED COM PROCEDURES, RETURNED TO BNA, AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE RIGHT HIGH TEMPERATURE SENSOR. OPERATIONAL CHECK NORMAL.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND FORWARD OVERWING EMERGENCY EXIT LIGHTS INOPERATIVE. REPLACED BATTERIES IN POWER SUPPLY. OPERATIONAL CHECK NORMAL.

Part: PROCESSOR UNIT — INOPERATIVE (E/E COMPT)

DURING CLIMB-OUT, THE RIGHT MAIN INBOARD BRAKE ASSEMBLY INDICATED AN OVERTEMP CONDITION. THE FLIGHT CREW LOWERED THE LANDING GEAR HANDLE PER COM PROCEDURES RESULTING IN A LANDING GEAR UNSAFE LIGHT ILLUMINATION. LANDING GEAR WAS RECYCLED WITH A CONTINUAL ILLUMINATION OF THE LEFT LANDING GEAR UNSAFE LIGHT. FLIGHT LANDED AT DESTINATION WITHOUT INCIDENT. MAINTENANCE REPLACED THE LANDING GEAR INDICATION PROCESSOR UNIT. OPERATIONAL CHECK NORMAL.

Part: BATTERY — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY EXIT LIGHT SIGNS OVER AFT OVERWING EXIT DOORS INOPERATIVE. MAINTENANCE REPLACED BATTERIES IN CHARGING UNIT.

Part: BATTERY PACK — DISCHARGED (CABIN)

DURING INSPECTION, THE OVERHEAD EMERGENCY LIGHTS WERE FOUND TO BE INOPERATIVE. MAINTENANCE REPLACED BATTERY PACK, OPERATIONAL CHECK OK.

Part: BATTERY — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND FORWARD RIGHT HAND AND LEFT HAND EMERGENCY EXIT LIGHTS INOPERATIVE. MAINTENANCE REPLACED BATTERY PACK, OPERATIONAL CHECK NORMAL.

Part: BATTERY — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY EXIT LIGHTS INOPERATIVE AT SEAT ROWS 8 THROUGH 12 AND IN TAILCONE AREA. MAINTENANCE REPLACED BATTERIES. OPERATIONAL CHECK OK.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND CEILING EMERGENCY LIGHTS INOPERATIVE BETWEEN ROWS 14 AND 18. REPLACED BATTERIES. OPERATIONAL CHECK OK.

Part: RADAR — FAILED (E/E COMPT)

EN ROUTE, WEATHER RADAR BECAME INOPERATIVE. RESET CIRCUIT BREAKER BUT UNABLE TO PAINT ANY WEATHER OR GROUND ON SCREEN. FLIGHT DIVERTED TO ATL AND LANDED WITHOUT INCIDENT. REPLACED RADAR TRANSCEIVER AND RADAR ANTENNA, OPERATIONAL CHECK OK.

Part: AUTOPILOT — MALFUNCTIONED (E/E COMPT)

AUTO-PILOT DISENGAGED THREE TIMES DURING FLIGHT. WOULD NOT ALLOW ADDITIONAL RESET. FLIGHT DIVERTED TO MEM AND LANDED WITHOUT INCIDENT. REPLACED THE NR 2 VERTICAL GYRO. PERFORMED AUTO-PILOT SYSTEM CHECK PER MAINTENANCE MANUAL, OPERATIONAL CHECK OK.

Part: BATTERY — DISCHARGED (COCKPIT)

DURING LINE CHECK, FOUND COCKPIT EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERY, OPERATIONAL CHECK OK.

Part: CONTROL CABLE — BROKEN (RT NLG DOOR)

AFTER TAKEOFF DURING GEAR RETRACTION, HEARD LOUD POP NOISE AND EXPERIENCED MODERATE FLUTTER. ALL GEAR INDICAITONS WERE NORMAL. FLIGHT RETURNED TO PHL AND LANDED WITHOUT INCIDENT. FOUND RIGHT NOSE GEAR DOOR STOP CABLE BROKEN. REMOVED CABLE AND HARDWARD AND PLACARDED SYSTEM PER MEL 32-7. AIRCRAFT APPROVED FOR SERVICE.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND OVERWING EMERGENCY EXIT LIGHT LEFT SIDE WILL NOT ILLUMINATE. REPLACED BATTERIES, OPERATIONAL CHECK OK.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY LIGHT IN CATWALK AREA INOPERATIVE. REPLACED BATTERIES. OPERATIONAL CHECK OK.

Part: STRUT — REQD SERVICE (NOSE GEAR)

LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. NOSE WHEEL WAS STEERABLE, FLIGHT CONTINUED TO DESTINATION WITH GEAR EXTENDED. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE SERVICED NOSE STRUT TO PROPER LEVELS, OPERATIONAL CHECK NORMAL ON GEAR SWING.

Part: SWITCH BRACKET — FAILED (LT MLG)

AFTER TAKEOFF AND GEAR RETRACTION, LEFT GEAR UNSAFE LIGHT ILLUMINATED. PERFORMED COM PROCEDURE AND GEAR UPLATCH CHECK, GEAR DOOR LIGHT MOMENTARILY ILLUMINATED THEN EXTINGUISHED ALONG WITH GEAR UNSAFE LIGHT. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE ADJUSTED BRACKET AND ROLLER AND LINK ASSEMBLY, OPERATIONAL CHECK OK.

Part: UNSAFE LIGHT — ILLUMINATED (LT MLG)

LEFT GEAR UNSAFE LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION. FOLLOWED COM PROCEDURE AND RECYCLED GEAR. GEAR DOWN INDICATIONS ARE NORMAL BUT LEFT GEAR UNSAFE LIGHT REMAINED ON WITH GEAR UP. FLIGHT CONTINUED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE REPAIRED WIRING AT S3-65, STUD NR 5. REPLACED STRIKER FOR LEFT SWITCH, OPERATIONAL CHECK OK.

Part: SWITCH STRIKER — OUT OF ADJUST (LT MLG)

AFTER TAKEOFF, THE GEAR UNSAFE LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION. RECYCLED GEAR, LIGHT REMAINED ILLUMINATED. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED LEFT SWITCH STRIKER, ADJUSTED AND CYCLED GEAR SEVERAL TIMES, OPERATIONAL CHECK OK.

Part: DOWNLOCK SWITCH — MALFUNCTIONED (LT MLG)

AFTER TAKEOFF FROM MSY, THE LEFT MAIN LANDING GEAR UNSAFE LIGHT REMAINED ILLUMINATED. FOLLOWED COM PROCEDURE AND DIVERTED TO MEM. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED LEFT GEAR UP AND DOWNLOCK SWITCHES. REMOVED, DISASSEMBLED, CLEANED, AND REINSTALLED RESTRICTOR. CYCLED GEAR AT LEAST TEN TIMES. OPERATIONAL CHECK NORMAL.

Part: UNSAFE LIGHT — ILLUMINATED (LT MLG)

ON DEPARTURE, THE LEFT GEAR UNSAFE LIGHT REMAINED ILLUMINATED. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. ALL GEAR LIGHTS GREEN WHEN GEAR WAS EXTENDED FOR LANDING. MAINTENANCE INSPECTED AND CHECKED WIRING, UPLATCH ASSEMBLY AND ADJUSTED THE DOOR ROLLER. CYCLED GEAR, OPERATIONAL CHECK OK.

Part: BATTERY PACK — DISCHARGED (TAILCONE)

DURING LINE CHECK, FOUND TAILCONE EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERY PACK, OPERATIONAL CHECK GOOD.

Part: SPLICE — FAILED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY EXIT FLOOR PROXIMITY LIGHTS INOPERATIVE FROM ROWS 6-12 DEF. REPLACED SPLICE BEHIND SIDEWALL-OPERATIONAL CHECK OK.

Part: SPLICE — BROKEN (CABIN)

DURING LINE CHECK, FOUND EMERGENCY ESCAPE FLOOR LIGHTING INOPERATIVE AT ROWS 7 - 13. REPAIRED BROKEN SPLICE. OPERATIONAL CHECK OK.

Part: WIRE — BROKEN (CABIN)

DURING LINE CHECK, FOUND EMERGENCY EXIT FLOOR LIGHTS INOPERATIVE AT FORWARD OVERWING EXIT. REPAIRED BROKEN WIRE AT RIGHT SIDEWALL. OPERATIONAL CHECK OK.

Part: BATTERY PACK — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY ESCAPE PATH LIGHTING FLICKERING ON DIMLY. ALSO, REPORTED AS FLICKERING ON AND OFF IN-FLIGHT. REPLACED BATTERY PACK AND RECYCLED SYSTEM. OPERATIONAL CHECK OK.

Part: POWER SUPPLY — INOPERATIVE (CABIN)

DURING LINE CHECK, FOUND COCKPIT FORWARD ENTRY AND GALLEY OVERHEAD EMERGENCY LIGHTS INOPERATIVE. REMOVED AND REPLACED POWER SUPPLY, OPERATIONAL CHECK GOOD.

Part: BATTERIES — DISCHARGED (TAIL COMPT)

DURING LINE CHECK, FOUND ALL TAIL COMPARTMENT EMERGENCY LIGHTS INOPERATIVE OR VERY DIM. REPLACED LAMPS, BATTERIES, POWER PACKS AND ALL CHECKED GOOD.

Part: DOOR PAN — CRACKED (EMERG EXIT)

DURING H-CHECK, FOUND A CRACK IN THE FORWARD LEFT EMERGENCY EXIT DOOR PAN UPPER EDGE. REPAIRED PAN (P/N 5913195-1), PER EA 97-102583.

Part: DOOR PAN — CRACKED (EMERG EXIT)

DURING H-CHECK, FOUND A TWO INCH CRACK IN THE FORWARD LEFT EMERGENCY OVERWING EXIT DOOR PAN. REPAIRED PAN (P/N 5913195-1) PER EA 97-102583.

Part: DOOR PAN — CRACKED (EMERG EXIT)

DURING H-CHECK, FOUND A CRACK IN THE FORWARD RIGHT EMERGENCY EXIT DOOR PAN AT THE UPPER EDGE. REPAIRED PAN (P/N 5913195-1), PER EA 99-103287.

Part: INTERCOSTAL — CRACKED (FS 148)

DURING H-CHECK, FOUND A CRACK IN THE SERVICE DOOR JAMB TO COCKPIT LOWER SILL INTERCOSTAL FS 148. REPAIRED INTERCOSTAL (P/N 911557-3), PER EA 97-101985.

Part: SUPPORT — CORRODED (FS 229-250)

DURING H-CHECK, FOUND CORROSION IN THE CENTER LINE FLOOR SUPPORT CAP FS 229 TO 250. REPAIRED CAP (P/N 5910137-9), PER EA 97-103281.

Part: BLKHD FRAME — CORRODED (FS 1072)

DURING H-CHECK, FOUND CORROSION IN THE AFT PRESSURE BULKHEAD FRAME FS 1072 FROM LONGERON 17L TO THE CUSP. REPAIRED FRAME (P/N 5910163-73), PER EA 97-101982.

Part: FLAPPER VALVE — LACK OF LUBE (RT TEMP SENSOR)

TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED AFTER DEPARTURE. FLIGHT RETURNED TO MEM AND LANDED WITHOUT INCIDENT. FOUND FLAPPER VALVE IN RIGHT HIGH TEMPERATURE SENSOR STUCK CLOSED. LUBED SWITCH, OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.

Part: WIRE — BROKEN (LT GEN TRANS)

LOSS OF LEFT GENERATOR WITH CROSSTIE LOCKOUT OCCURRED DURING TAKEOFF ROLL. ABORTED TAKEOFF AT 80 KNOTS AND RETURNED TO GATE. FOUND BROKEN WIRE AT TERMINAL ON LEFT GENERATOR CURRENT TRANSFORMER. INSTALLED NEW TERMINAL. OPERATIONAL CHECK OK, AIRCRAFT RETURNED TO SERVICE.

Part: WIRE — BROKEN (LT AC GENERATOR)

SHORTLY AFTER TAKEOFF, LEFT GENERATOR OFF, DC BUS OFF, LEFT AC BUS OFF, AND AC CROSSTIE LOCKOUT LIGHTS ILLUMINATED. INITIATED COCKPIT OPERATING MANUAL PROCEDURES AND TRIED RESTORING GENERATOR BACK ON LINE WITH NO SUCCESS. FLIGHT RETURNED TO YEG AND LANDED WITHOUT INCIDENT. REPAIRED BROKEN WIRE TO FIELD CONNECTOR. OPERATIONAL CHECK OK, AIRCRAFT RETURNED TO SERVICE.