N149US

Part: STIFFENER — CORRODED (BULKHEAD) · corrosion level 2 · airframe 88,292 hrs · 28,592 cycles

DURING L-CHECK, FOUND CORROSION ON THE LOWER END OF VERTICAL STIFFENER UNDER WING FUEL TANK FORWARD PRESSURE BULKHEAD AT BS 1156 L45L-L45R. REPAIRED PER EA 11-180793.

Part: TAIL CONE — SEPARATED (AFT) · airframe 79,445 hrs · 28,320 cycles

DURING CLIMB, A BUMP/NOISE WAS NOTICED. FLIGHT CREW DETERMINED IT WAS EITHER WAKE TURBULENCE OR CONTAINER SHIFT. FLIGHT CREW NOTICED NO PROBLEMS AND ALL INDICATIONS WERE NORMAL. FLIGHT CONTINUED TO DESTINATION. UPON LANDING, THE TOWER REPORTED A PROBLEM WITH THE TAIL CONE BUT NO FIRE OR SMOKE. SHUT DOWN NR 2 ENGINE AND DID NOT START APU AS A PRECAUTION. TAXI AND PARKING WERE NORMAL. MAINTENANCE FOUND TAIL CONE HAD BROKEN AWAY FROM THE ATTACH LUGS. REPLACED THE TAIL CONE.

Part: COMPRESSOR — STALLED (NR 1 ENGINE)

AT 100 KTS DURING TAKEOFF ROLL, THE NR 1 ENGINE COMPRESSOR STALLED. THE CREW REPORTED A LOUD BANG AND OBSERVED FALLING N1 AND EGT OVERTEMPERATURE. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED THE ENGINE AND FOUND METAL DEBRIS IN THE TAILPIPE. THE AIRCRAFT WAS FERRIED ON TWO ENGINES TO MSP FOR AN ENGINE CHANGE.

Part: DUCT — FAILED (NR 2 ENGINE)

DURING INITIAL CLIMB AFTER TAKEOFF AT APPROXIMATELY 2000 FT MSL, THE NR 2 ENGINE FIRE WARNING ANNUNCIATED. THE ENGINE WAS SHUT DOWN PER THE FIRE WARNING CHECK LIST AND THE NR 1 FIRE BOTTLE WAS DISCHARGED. THE FIRE WARNING CEASED AFTER THE BOTTLE WAS DISCHARGED. AN EMERGENCY WAS DECLARED AND 127,000 LBS OF FUEL WAS DUMPED. THE AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE NR 2 ENGINE FINDING A CLAMP ON THE 15TH STAGE PNEUMATIC SUPPLY DUCT BROKEN. REPLACED THE CLAMP AND DUCT, OPERATIONAL CHECK NORMAL.

Part: LINE — FAILED (NR 1 HYD SYST)

DURING CRUISE, NR 1 HYDRAULIC SYSTEM INDICATED TOTAL LOSS OF FLUID. FLIGHT DIVERTED TO BOS AND LANDED WITHOUT INCIDENT. REPLACED THE NR 1 ENGINE HYDRAULIC KIT AND REPLACED LINE IN CENTER WHEEL WELL. LEAK AND OPERATIONAL CHECK OK.

Part: ENGINE — FLAMED OUT (NR 1)

WHILE IN CRUISE FLIGHT AT FL340, THE AIRCRAFT ENCOUNTERED MODERATE TURBULENCE, POSSIBLY WAKE TURBULENCE, AND THE NR 1 ENGINE FLAMED OUT. THE ENGINE WAS SECURED PER ENGINE FAILURE CHECKLIST AND A DESCENT FROM FL340 WAS STARTED. AT FL300, A RESTART WAS ACCOMPLISHED PER COM PROCEDURE. ALL ENGINE INDICATIONS WERE NORMAL FOR THE REMAINDER OF THE FLIGHT. MAINTENANCE INSPECTED THE ENGINE AND PERFORMED A FULL POWER ENGINE RUN, ALL WITH NO PROBLEMS FOUND. THE AIRCRAFT RETURNED TO SERVICE. EXACT PART CAUSING PROBLEM TO BE DETERMINED.

Part: COMPRESSOR — STALLED (NR 3 ENGINE)

DURING TAKEOFF ROLL AND WHILE INCREASING POWER, THE NR 3 ENGINE EXPERIENCED A COMPRESSOR STALL. N2 WAS AT 70 PERCENT AND EPR WAS 1.35 WITH NO ABNORMAL ENGINE INDICATIONS. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED THE ENGINE PER MM 71-00-00, PG 210 WITH NO DEFECTS NOTED. WIND CONDITIONS AT TAKEOFF WERE A 30 DEGREE CROSSWIND FROM AIRCRAFT LEFT AT 40 KTS.

Part: POWER SUPPLY — INOPERATIVE (CABIN)

DURING LINE INSPECTION, FOUND THE FIRST CLASS EMERGENCY FLOOR TRACK LIGHTS INOPERATIVE. MAINTENANCE REPLACED POWER SUPPLY AND BATTERY PACK.

Part: TR UNIT — MALFUNCTIONED (NR 3 ENGINE)

DURING LANDING ROLLOUT, THE NR 3 ENGINE THRUST REVERSER DID NOT STOW. THE NR 3 ENGINE EGT CLIMBED TO 920C AND THE ENGINE WAS SHUT DOWN. MAINTENANCE INSPECTED THE ENGINE PER MM 70-00-00. EGT WAS WITHIN LIMITS AND NO DEFECTS WERE NOTED. GROUND RUN OF ENGINE CHECKED GOOD. PART CAUSING PROBLEM TO BE DETERMINED.

Part: OIL QUANTITY — LOW (NR 3 ENGINE)

DURING CRUISE FLIGHT, THE NR 3 ENGINE LOW OIL QUANTITY AND OIL PRESSURE DEVELOPED. THE NR 3 ENGINE WAS SHUT DOWN AND THE AIRCRAFT DIVERTED TO YMX. AN UNEVENTFUL LANDING WAS PERFORMED. MAINTENANCE CHECKED FOR OIL LEAKS, INSPECTED CHIP DETECTORS, ADDED ENGINE OIL AND PERFORMED GROUND RUN AND LEAK CHECK. NO DISCREPANCIES NOTED.

Part: FAIL LIGHT — ILLUMINATED (NR 2 ENGINE)

AFTER TAKEOFF POWER WAS APPLIED, THE NR 2 ENGINE FAIL LIGHT ILLUMINATED AT 48 PERCENT N1. CREW ABORTED TAKEOFF AND RETURNED TO THE GATE. INSPECTED THE NR 2 ENGINE FOR DISCREPANCIES AND NON WERE FOUND. AIRCRAFT RETURNED TO SERVICE, THE NR 2 ENGINE FAIL LIGHT DETECTOR PLACED ON MEL 77-7A.

Part: ENGINE — FOD (NR 3)

DURING TAXIING, THE NR 3 ENGINE GENERATOR CAME OFF-LINE FOLLOWED BY HIGH EGT OF 840 DEGREES. THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT RETURNED TO THE GATE. GROUND CREW AND SEVERAL PASSENGERS NOTED WHAT APPEARED LIKE A PIECE OF PLASTIC BEING SUCKED INTO THE ENGINE FOLLOWED BY BLACK SMOKE. PERFORMED FOD INSPECTION AND RUN-UP AT TAKEOFF POWER. CHECKS WERE NORMAL. AIRCRAFT RETURNED TO SERVICE.

Part: LONGERON — CORRODED (FS 1781)

DURING T-CHECK, FOUND CORROSION ON LONGERON 46R AT FS 1781. REPAIRED LONGERON (P/N AFA 7098-1) PER EA 11-103255.

Part: LONGERON — CORRODED (FS 1964)

DURING T-CHECK, FOUND CORROSION ON LONGERON 48L AT FS 1964. REPAIRED LONGERON (P/N AGA 7047-1) PER EA 11-103940.

Part: SPLICE — CORRODED (FS 1156)

DURING T-CHECK, FOUND CORROSION ON THE LONGERON 50L SPLICE AT FS 1156. REPAIRED SPLICE (P/N ADA 7313) PER EA 11-103956.

Part: JAMB — CORRODED (FS 999)

DURING T-CHECK, FOUND CORROSION IN THE FORWARD CARGO DOOR JAMB AT FS 999, LONGERON 43L. REPAIRED JAMB (P/N S2929817) PER EA 11-103895.

Part: BLKHD WEB — CORRODED (FS 2007)

DURING T-CHECK, FOUND CORROSION ON THE FS 2007 AFT PRESSURE BULKHEAD WEB AND STIFFENER AT LBL 32, Z = -40. REPAIRED WEB (P/N NJC6040-501) AND STIFFENER (P/N NJC6040-109) PER EA 11-99304.

Part: LONGERON — CORRODED (FS 1501-1521)

DURING T-CHECK, FOUND CORROSION ON EXTERNAL LONGERONS 29R TO 31R FROM FS 1501 TO 1521. REPAIRED LONGERONS (P/N AEA7133-2, 7132-2, AND 7136-2, RESPECTIVELY) PER EA 11-103946.

Part: LONGERON — CORRODED (FS 1156)

DURING T-CHECK, FOUND CORROSION ON LONGERON 47R AT FS 1156. REPAIRED LONGERON (P/N ADA7308-502) PER EA 11-103951.

Part: TR UNIT — MALFUNCTIONED (NR 3 ENGINE)

THE NR 3 ENGINE REVERSER LIGHT ILLUMINATED AT 80 KNOTS AND THE TAKEOFF WAS ABORTED. THE REVERSER WAS LOCKED OUT AND PLACED ON MEL.

Part: POWER CABLES — MALFUNCTIONED (NR 2 ENGINE)

DURING LANDING THE NR 2 ENGINE POWER LEVER COULD NOT BE RETARDED AND THE ENGINE WAS SHUT DOWN DURING ROLLOUT. THE THROTTLE BOOT WAS CLEANED, DRIED WITH ALCOHOL, AND THE OPERATION CHECKED OK. LATER AT MSP, THE LONG AND SHORT ENGINE PUSH/PULL CABLES WERE REPLACED AND THE AFT PRESSURE BULKHEAD SEALS WERE CLEANED AND RELUBED.