N677MC

Part: A/C PACK — OVERHEATED (RIGHT) · airframe 3,046 hrs · 2,738 cycles

A/C 9884 FLT 1246 FAR-MSP: RIGHT PACK OVERHEATING DID NOT REACT TO AUTO SELECTION, WENT TO MANUAL TO CONTROL. RIGHT PACK HAD OVERHEATED WITH SMOKE IN THE CABIN. FLIGHT RETURNED TO FAR, LANDING UNEVENTFULLY. REPLACED RIGHT COALESCER BAG, RIGHT CABIN TEMP SENSOR AND RIGHT TEMP CONTROLLER. CHECKS OK.

Part: STRUCTURE — CRACKED (SERVICE DOOR) · airframe 68,218 hrs · 58,356 cycles

DURING LEAK CK, 2 CRACKS WERE FOUND AT THE FWD LOWER AND THE UPPER AFT CORNERS OF THE FWD LAV SERVICE DOOR. THE FWD CRACK WAS FOUND TO BE 1.5" LONG AND AFT CRACK WAS 0.40" LONG. SECTION I - DURING LEAK CK. SECTION II - WITHIN EVERY 3,000 CYCLES AFTER SECTION I, SECTION III - ON OR BEFORE 8,000 CYCLES AFTER SECTION I.

Part: DOUBLER — CRACKED (FUSELAGE) · airframe 68,218 hrs · 58,356 cycles

FUSELAGE EXTERIOR FWD LAV SERVICE PANEL LANDING INTERNAL DOUBLER HAS APPROXIMATELY 1.5 INCH CRACK AT FWD LOWER CORNER. ACCOMPLISHED ERA 489353-4 P-192 REQUIRED INSPECTION COMPLETED.

Part: SKIN — CRACKED (FUSELAGE) · airframe 68,218 hrs · 58,356 cycles

L1 DOOR JAMB, FORWARD UPPER CORNER HAS APPROX .750 CRACK IN OUTER SKIN REPAIR PER SRM 53-05 FIG.25A OR FIG 26 AD FAR INSPECTION. CUT OUT SKIN AND REMOVED CRACK IAW DC9 SRM 53-05 FIG 26. FABRICATED 2EA DOUBLERS AND 2EA FILLERS IAW DC-9 SRM53-05 INSTALLED REPAIR PARTS L1 DOOR JAMB FORWARD UPPER CORNER IAW 53-05 FIG 26. REPITIVE INSPECTION INTERVALS 20,000 LANDINGS INSPECTION THRESHOLD 28,000 LANDINGS IAW DC08 SRM 53-05 FIG 26 01 FEB 11 P-138 REQUIRED INSPECTION COMPLETED.

Part: ATTACH BRACKET — CRACKED (SPOILER ACTUATOR) · airframe 68,218 hrs · 58,356 cycles

LT WING T/E REAR SPAR FWD OF INBD SPOILER ACTUATOR ATTACH BRACKET CRACKED. REMOVED ATTACH BRACKET IAW SRM 51-30-5. LOCATED, DRILLED AND INSTALLED NEW ATTACH BRACKET IAW SRM 51-10-4, 51-30-5. REQUIRED INSP COMPLETED.

Part: SKIN — CRACKED (BS 69 L19-20R) · airframe 68,218 hrs · 58,356 cycles

FUSELAGE EXTERIOR STA 69 BETWEEN L19R AND L20R SKIN CRACKED AT FASTENER. REMOVED DAMAGE IAW SRM 53-04, FIG 38, FABRICATED 1EA FILLER & 1EA DOUBLER IAW SRM 53-34-0, FIG 1, 53-01 FIG 4, 51-10-3. INSTALLED REPAIR PARTS IAW SRM 53-04, FIG 38 & 51-30-2. REQUIRED INSPECTION COMPLETED.

Part: SKIN — CRACKED (BS 69 L21-22R) · airframe 68,218 hrs · 58,356 cycles

FUSELAGE EXTERIOR STA 69 BETWEEN L21R AND L22R SKIN CRACKED AT 3EA FASTENERS. CUT OUT CRACKED AREA FROM SKIN AT STA 69 BETWEEN L21R & L22R IAW SRM 53-04, FIG 38. FABRICATED DOUBLER & FILLER IAW SRM 53-04, FIG 38, SRM 51-10-4, SRM 51-10-3 AND INSTALLED REPAIR. PARTS IAW SRM 53-04. REQUIRED INSPECTION COMPLETED.

Part: HINGE — CRACKED (TE FLAP) · airframe 68,218 hrs · 58,356 cycles

LT WING FLAP, FLAP HALF OF NR 2 HINGE HAS NDT VERIFIED CRACK. REMOVED & REPLACED LT FLAP NR 2 FLAP HINGE AFT HALF IAW DC-9 OHM 27-50-1 PERFORMED OPS CHECK; OPS CHECK GOOD IAWDC-9 AMM 27-57-02 REMOVED & REINSTALLED BUSHINGS IN NR 2 FLAP HINGE IAW DWG 5912150 & BOEING SPM 20-10-7 ON 2448N00409.

Part: SKIN — CRACKED (BS 101 L19-20R) · airframe 68,218 hrs · 58,356 cycles

FUSELAGE EXTERIOR, STA 101 BETWEEN L19R AND L20R SKIN CRACKED AT FASTENER. GAINED ACCESS, CUT OUT DAMAGE 1.55 X 1.55. NDT VERIFIES NO CRACK INDICATION NOTED, FABRICATED & INSTALLED REPAIR FILLER FROM .050 & 1EA REPAIR DOUBLER FROM .032 RESTORED AREA IAW SRM 53-04, FIG 38, SHT 33, 53-33-0, FIG 1, 51-60-0, FIG 1, 51-30-1, 51-10-3, 51-10-2, 51-30-5, 51-10-3, MM 20-16-00, NDT SPM 06-10-01-001, TOPP 20- REQUIRED INSP COMPLETED.

Part: RIB — DAMAGED (LT WING TE FLAP) · airframe 67,948 hrs · 58,122 cycles

DURING LINE CHECK FOUND FLAP DAMAGE TO LT WING FLAP T/E 4 FT OTBD FROM INBD MOST EDGE. REMOVED T/E PANEL 788 IAW CMM 27-50-1. REMOVED DAMAGED RIB SRM 57-03 INSTALLED NEW CHANNEL AND DRILLED UP NEW TIP IAW SRM 57-50-09. INSTALLED INBD LT FLAP T/E TIP, IAW SRM 57-50-09. COMPLETED INSTALLATION OF FLAP ASSY. FOLLOWING O/H MANUAL 27-50-1. NEEDS EDGE SEALANT AND GAP COVERS AND FLAP HINGE FAIRINGS INSTALLED. (WIP 059743) ACCOMPLISHED EDGE SEALANT, HINGE FAIRING AND GAP COVERS INSTALLATION. (REF AMM 27-51-01)

Part: MOUNT — CRACKED (RT ENGINE) · airframe 67,509 hrs · 57,725 cycles

DURING LINE CHECK, FOUND CRACK IN RT PYLON AFT ENGINE MOUNT SUPPORT FRAME AFT WEB. REPAIRED IAW ERA 484935-14.

Part: POWER SUPPLY — INOPERATIVE (EMERGENCY LIGHTS) · airframe 66,875 hrs · 57,164 cycles

DURING LINE CHECK, MX FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 14-18 OF THE CABIN WERE INOPERATIVE. MX REPLACED THE EMERGENCY LIGHT POWER SUPPLY AND OPS CHECKED THE SYS.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHTS) · airframe 66,443 hrs · 56,796 cycles

DURING LINE CHECK, MX FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 23-26 OF THE CABIN WERE TOO DIM TO PROVIDE ESCAPE GUIDANCE. MX REPLACED THE BATTERY PACK AND THE LIGHTS RETURNED TO AN OPERATIONAL CONDITION.

Part: SUPPORT FITTING — CORRODED (LT MLG) · corrosion level 2 · airframe 66,384 hrs · 56,746 cycles

DURING LINE CHECK FOUND CORROSION ON RT MLG SUPPORT FITTING. REPLACED FITTING IAW CMM 57-40-01 AND AMDS 3210-9904M-RT.

Part: WIRE — DAMAGED (EMERGENCY LIGHTS) · airframe 66,269 hrs · 56,649 cycles

DURING LINE CHECK MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN THE FIRST CLASS SECTION OF THE CABIN HAD FAILED. MAINTENANCE REPAIRED THE WIRING AND FUNCTIONALLY CHECKED THE SYSTEM.

Part: BATTERY — DISCHARGED (CABIN) · airframe 66,130 hrs · 56,531 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT ALL OF THE EMERGENCY PATHWAY LIGHTS FOR THE CATWALK IN THE TAIL COMPARTMENT WERE INOPERATIVE. MAINTENANCE REPLACED THE BATTERIES. OPERATIONAL CHECK WAS GOOD.

Part: FLOOR PANEL — DEBONDED (CABIN) · airframe 65,105 hrs · 55,644 cycles

DURING "H" CHECK, FOUND FLOOR PANEL NR 17 HAD 10 SUPPORT CHANNELS DISBONDED AT END ATTACH POINTS. REPAIRED PER EA 98-214550.

Part: FLOOR SUPPORT — CRACKED (FUSELAGE) · airframe 65,105 hrs · 55,644 cycles

DURING "H" CHECK FOUND FLOOR PANEL NR 18 HAD 4 SUPPORT CHANNELS CRACKED. REPAIRED PER EA 98-214548.

Part: RIB — CRACKED (RT WING LE) · airframe 65,105 hrs · 55,644 cycles

DURING "H" CHECK FOUND CRACK IN RT WING LEADING EDGE RIB AT STATION XIS 134. REPAIRED PER EA 98-214545.

Part: BATTERY — INOPERATIVE (EMERGENCY LIGHTS)

DURING LINE CHECK, MX FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 9-16 OF THE CABIN WERE INOPERATIVE. MX REPLACED THE BATTERIES. OPS CHECK WAS GOOD. (K)

Part: FUSE — FAILED (EMERGENCY LIGHTS)

DURING LINE CHECK, MX FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 9-14 AND THE LT FWD OVERWING EMERGENCY EXIT SIGN WERE INOPERATIVE. MX INSTALLED NEW BATTERIES FIRST BUT WHEN THAT DID NOT CORRECT THE PROBLEM THEY REPLACED THE ASSOCIATED FUSE IN THE POWER SUPPLY AND LIGHTS OPERATIONALLY CHECKED GOOD. (K)

Part: FUSE — BLOWN (CABIN) · airframe 63,965 hrs · 54,657 cycles

DURING LINE CHECK MX FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 14-18 OF THE CABIN WERE INOPERATIVE. MX REPLACED THE ASSOCIATED FUSE. OPS CHECK WAS GOOD.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHT) · airframe 63,760 hrs · 54,473 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 9-13 OF THE CABIN WERE INOPERATIVE. MAINTENANCE REPLACED THE BATTERY PACK AND THE LIGHTS RETURNED TO AN OPERATIONAL CONDITION. (A)

Part: FUSE — FAILED (HYD PUMP) · airframe 63,370 hrs · 54,112 cycles

AS THE AIRCRAFT WAS BEING PUSHED BACK FOR DEPARTURE, THE RIGHT HYDRAULIC SYSTEM LOST ALL FLUID. COM PROCEDURES WERE COMPLIED WITH AND THE AIRCRAFT RETURNED TO THE GATE WITHOUT ANY FURTHER PROBLEM. MAINTENANCE FOUND A HYDRAULIC FUSE IN THE RIGHT WHEEL WELL HAD FAILED. THE FAILED FUSE, THE ELECTRICAL AUXILIARY HYD PUMP, THE ENGINE DRIVEN HYD PUMP, AND ALL APPLICABLE HYDRAULIC SYSTEM FILTERS WERE REPLACED. NO DEBRIS WAS FOUND IN ANY FILTER OR PUMP HOUSING. LEAK CHECK AND OPERATIONAL CHECK WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: FUSE — INOPERATIVE (EMERGENCY LIGHTS) · airframe 63,211 hrs · 53,969 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN THE FIRST CLASS SECTION OF THE CABIN HAD FAILED. MAINTENANCE REPLACED THE ASSOCIATED FUSE IN THE PERTINENT POWER STRIP. OPERATIONAL CHECK WAS GOOD.

Part: FRAME — CRACKED (NR 1 PYLON) · airframe 61,345 hrs · 52,343 cycles

DURING ENGINE CHANGE, FOUND CRACKS IN NR 1 PYLON HORIZONTAL WEB FRAME AT XN 39.250. REPAIRED PER EA 98-209044.

Part: OVEN — SMOKE (GALLEY) · airframe 60,702 hrs · 51,771 cycles

WHEN FLIGHT ATTENDANT ATTEMPTED TO UTILIZE THE OVEN A THICK WHITE SMOKE DEVELOPED FROM THE ELECTRICAL WIRE CONNECTION AREA AT BACK WALL. SMOKE SMELLED OF ELECTRICAL BURNING AND DID NOT EMANATE FROM BURNING SPILLAGE INSIDE THE OVEN. AN INOPERATIVE OVEN FAN WAS CONFIRMED. ELECTRICAL CONNECTIONS WERE FOUND TO BE FREE OF DEFECTS. THE OVEN WAS REPLACED THE NEXT DAY AT MSP. THE AIRCRAFT HAS RETURNED TO SERVICE.

Part: UNKNOWN — MALFUNCTIONED (PITCH CONTROL) · airframe 58,934 hrs · 50,237 cycles

FLIGHT CREW REPORTS THAT THE FLIGHT CONTROL PITCH INPUTS WERE SLUGGISH DURING FINAL APPROACH FOR LANDING. AIRCRAFT DID NOT RESPOND IN A TIMELY MANNER AND PITCH RESPONSES WERE DELAYED. CREW HAD TO OVER CONTROL TO ACHIEVE THE DESIRED RESPONSE FROM THE AIRCRAFT. LANDING AT FNT WAS ACCOMPLISHED SAFELY AND WITHOUT INCIDENT. MAINTENANCE INSPECTED ALL ELEVATOR FLIGHT CONTROLS FOR BINDING, FREEDOM OF MOVEMENT, STIFFNESS, CABLE TENSIONS, RIGGING AND THAT CONTROL SURFACES ARE FAIRED. NO TROUBLE WAS POSITIVELY IDENTIFIED AND THE A/C WAS RETURNED TO SERVICE.

Part: LIMITER — CRACKED (LT HYD QTY) · airframe 55,961 hrs · 47,431 cycles

AIRCRAFT EXPERIENCED A TOTAL LOSS OF HYDRAULIC FLUID FROM THE LT SYSTEM AFTER RETRACTION OF LANDING GEAR DURING CLIMBOUT. COMPLIED WITH COM PROCEDURES AND THE FLIGHT RETURNED FOR AN UNEVENTFUL LANDING BACK AT MSP. IT WAS NOTED THAT THE RT HYDRAULIC SYSTEM MAINTAINED GOOD PRESSURE AND QUANTITY. MAINTENANCE FOUND THE LT HYDRAULIC SYSTEM FLUID QUANTITY LIMITER BROKEN AT THE INPUT PORT AND REPLACED IT. SYSTEM WAS RESERVICED, BLED, AND LEAK CHECKED AND ALL SYSTEM COMPONENTS OPERATED NORMALLY. AIRCRAFT RETURNED TO SERVICE.

Part: TIRE — SEPARATED (MLG) · airframe 54,144 hrs · 45,804 cycles

DURING TAKEOFF, THE NR 4 TIRE EXPERIENCED COMPLETE TREAD SEPARATION. DEBRIS FROM THIS FAILED TIRE DAMAGED THE NR 2 ENGINE CAUSING A LOSS OF OIL PRESSURE REQUIRING POWER REDUCTION TO IDLE BY FLIGHT CREW. FLIGHT RETURNED TO MCI AND LANDED OVERWEIGHT WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NBR 3 AND NBR 4 TIRE AND NBR 2 ENGINE.

Part: SLAT — MALFUNCTIONED (WING) · airframe 51,645 hrs · 43,571 cycles

WHILE ON APPROACH FOR LANDING AT MOT, CREW NOTICED THE SLAT DISAGREEMENT LIGHT ON AND THE AIRCRAFT ROLL TO THE RIGHT. FOLLOWED COM PROCEDURES. DUE TO INSUFFICIENT RUNWAY LENGTH FOR A NO SLAT LANDING AT MOT, THE CREW ELECTED TO DIVERT. CAPTAIN DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT AT MIB. MAINTENANCE INSPECTED ALL SLATS AND LUBED BOTH -T- DUCTS. THE AIRCRAFT RETURNED TO MSP FOR A MINIMUM WORKSCOPE MAINTENANCE ACTION.

Part: SENSOR — FAILED (NLG)

DURING APPROACH INTO DTW, THE NOSE LANDING GEAR UNSAFE INDICATOR LIGHT ILLUMINATED WITH LANDING GEAR EXTENSION. THE FLIGHT CREW FOLLOWED COM PROCEDURES, DECLARED AN EMERGENCY, UTILIZED THE EMERGENCY LANDING GEAR HANDLE (NO HELP), AND LANDED WITHOUT INCIDENT. DURING LANDING, THE MAIN LANDING GEAR DOORS REMAINED FREE AND CONTACTED THE RUNWAY SURFACE. MAINTENANCE REPLACED THE NOSE LANDING GEAR INDICATION SENSOR, ADDITIONAL HARDWARE AS REQUIRED, AND THE MAIN LANDING GEAR DOOR ASSEMBLIES. OPERATIONAL CHECK NORMAL.

Part: SWITCH — STICKING (E/E COMPT)

DURING TAKEOFF ROLL, THE TAKEOFF AURAL WARNING HORN SOUNDED. FLIGHT CREW ABORTED TAKEOFF AND RETURNED TO THE GATE WITHOUT INCIDENT. MAINTENANCE CLEANED AND LUBRICATED THE HORIZONTAL STABILIZER WARNING SWITCH, OPERATIONAL CHECK NORMAL.

Part: BATTERY PACK — DISCHARGED (CABIN)

DURING MAINTENANCE INSPECTION, FOUND OVERHEAD EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERY PACK, OPERATIONAL CHECK NORMAL.

Part: TEMP SENSOR — FAILED (TAIL COMPT)

AFTER TAKEOFF, TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED. LIGHT WENT OUT WITH POWER REDUCTION. FLIGHT RETURNED TO TPA AND LANDED WITHOUT INCIDENT. INSPECTED FOR TAIL COMPARTMENT AIR LEAKS AND REPLACED THE LEFT TEMPERATURE SENSOR, OPERATIONAL CHECK OK.

Part: TEMP SENSOR — FAILED (RIGHT)

DURING CLIMB-OUT OF DFW PASSING 17,000, TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED. FOLLOWED COCKPIT OPERATING MANUAL PROCEDURE. LIGHT REMAINED ON. LIGHT EXTINGUISHED WHEN POWER RETARDED TO 1.5 EPR. FLIGHT RETURNED TO DFW AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED DUCTING FOR LEAKAGE AND FOUND NONE. REPLACED TEMPERATURE SENSOR ON RIGHT SIDE. OPERATIONAL CHECK OK.

Part: LONGERON — CORRODED (BS 1151-1167)

DURING H-CHECK, FOUND CORROSION ON LONGERON 22L BETWEEN FS 1151 TO 1167. REPAIRED PER EA 98-111889.

Part: STRUT — REQD SERVICE (NLG)

AFTER TAKEOFF, NOSE GEAR FAILED TO RETRACT. FLIGHT RETURNED TO FAR AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND NOSE GEAR STRUT FLAT. SERVICE NOSE GEAR STRUT PER MM 32-21-2. REPLACED SCHRADER VALVE.

Part: RELEASE MECH — INOPERATIVE (TAILCONE)

DURING LINE CHECK, FOUND THAT EXCESSIVE FORCE WAS REQUIRED TO RELEASE THE TAILCONE. FOUND THE LOWER CABLE INNER SLEEVE LODGED IN THE CONDUIT. REMOVED THE SLEEVE, CHECKED OK.

Part: FUEL HEAT VALVE — FAILED (LT ENGINE)

WHILE APPLYING TAKEOFF POWER, THE LEFT ENGINE FUEL HEAT LIGHT ILLUMINATED. CREW ABORTED TAKEOFF AND THE SYSTEM WAS PLACED ON MEL. FLIGHT RESUMED AS SCHEDULED. MAINTENANCE REPLACED THE LEFT ENGINE FUEL HEAT VALVE. OPERATIONAL CHECKED OK.

Part: SOCKET — INOPERATIVE (CABIN)

DURING LINE CHECK, FOUND FLOOR PROXIMITY LIGHTS INOPERATIVE. REPLACED LIGHT SOCKET, OPERATIONAL CHECK GOOD.

Part: NOSE BULLET — ICED UP (NR 1 ENGINE)

NR 1 ENGINE EPR INDICATION WAS ABNORMALLY HIGH DURING POWER APPLICATION ON TAKEOFF ROLL. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE REMOVED ICE DEPOSITS FROM THE ENGINE NOSE BULLET AND PT2 PROBE. ENGINE INDICATIONS RETURNED TO NORMAL ON SUBSEQUENT RUNUP.

Part: STRUT — DEFLATED (NLG)

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

Part: STRUT — DEFLATED (NLG)

AIRCRAFT FAILED TO SHIFT FROM GROUND MODE TO FLIGHT MODE AFTER TAKEOFF. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. SERVICED NOSE LANDING GEAR STRUT TO PROPER LEVELS OF FLUID AND NITROGEN. OPERATIONAL CHECK NORMAL AND AIRCRAFT RETURNED TO SERVICE.

Part: STRUT — DEFLATED (NLG)

NOSE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. RED NOSE UNSAFE LIGHT REMAINED ILLUMINATED. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. FOUND ICE ACCUMULATION AROUND BASE OF NOSE GEAR GLAND NUT AND NOSE STRUT DEFLATED. CLEANED ICE FROM AROUND NOSE GEAR AND SERVICED NOSE STRUT TO PROPER LEVELS. OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.

Part: BATTERY — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND CEILING EMERGENCY LIGHTS BETWEEN ROWS 6 AND 11 INOPERATIVE. REPLACED BATTERIES, OPERATIONAL CHECK OK.

Part: DN LOCK SENSOR — FAILED (NLG)

DURING CLIMB, NOSE GEAR UNSAFE LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION. RECYCLED LANDING GEAR AND LIGHT REMAINED ILLUMINATED, CONTINUED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED THE NOSE LANDING GEAR DOWNLOCK SENSOR, OPERATIONAL CHECK GOOD.