N157US

Part: FRAME — CRACKED (FUSELAGE) · airframe 70,169 hrs · 28,687 cycles

DURING L CHECK FOUND CRACK ON FRAME AT BS 458 STRINGER 40L. REPAIRED PER EA 11-179142.

Part: TR UNIT — MALFUNCTIONED (NR 3 ENGINE)

DURING LANDING ROLLOUT, THE NR 3 ENGINE THRUST REVERSER DID NOT STOW AND THE ENGINE COMPRESSOR STALLED. THE EGT REACHED 1000C AND THE ENGNE WAS SHUT DOWN. MAINTENANCE INSPECTED THE ENGINE AND DEFERRED THE REVERSER PER MEL 78-1A. THE REVERSER WAS STOWED AND DEACTIVATED PER MEL DDG. EXACT PART CAUSING PROBLEM TO BE DETERMINED.

Part: COMPRESSOR — STALLED (NR 1 ENGINE)

DURING LANDING ROLLOUT WHILE COMING OUT OF REVERSER THRUST, THE NBR 1 ENGINE COMPRESSOR STALLED. THE EGT ROSE TO 850C AND THE ENGINE WAS SHUT DOWN. THE CREW STATED THERE WAS A TAIL CROSSWING DURING LANDING. MAINTENANCE INSPECTED THE ENGINE WITH NO DEFECTS NOTED. EGT WAS WITHIN OPERATIONAL LIMITS AND THE AIRCRAFT RETURNED TO SERVICE.

Part: BLEED DUCT — DAMAGED (NR 1 ENGINE)

AT ROTATION, THE NR 1 ENGINE FIRE LIGHT ILLUMINATED FOLLOWED BY THE REVERSER UNLOCK LIGHT. WITH POWER REDUCED TO IDLE ON THE NR 1 ENGINE, THE FIRE LIGHT WENT OUT. FUEL WAS DUMPED AND THE AIRCRAFT RETURNED WITHOUT INCIDENT. MAINTENANCE FOUND AN ENGINE BLEED DUCT DAMAGED AND NUMEROUS REVERSER COMPONENTS OVERHEATED. THE DAMAGED PARTS WERE REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: LONGERON — CORRODED (BS 1119)

DURING M-CHECK, FOUND CORROSION ON LONGERON 51R AT FS 1119. REPAIRED PER EA 11-152790.

Part: SKIN — CORRODED (BS 1509-1531)

DURING M-CHECK, FOUND CORROSION ON FUSELAGE SKIN FS 1509 TO 1531 AND LONGERON 49L TO 49R. REPAIRED PER EA 11-150758.

Part: SKIN — CORRODED (BS 1157)

DURING M CHECK, FOUND CORROSION ON SKIN DOUBLER AT FS 1157 BETWEEN LONGERON 51L AND 50L. REPAIRED PER EA 11-152199.

Part: SKIN — CORRODED (BS 1148)

DURING M CHECK, FOUND CORROSION ON FUSELAGE SKIN AT FS 1148 BETWEEN LONGERONS 51R AND 52. REPAIRED PER EA 11-152199.

Part: SEAT TRACK — CORRODED (BS 1288-1301)

DURING M-CHECK, FOUND CORROSION ON SEAT TRACK (P/N AEA7325-11) BETWEEN FS 1288 AND 1301 AT DOOR 3L. REPAIRED PER EA 11-152198.

Part: FLOORBEAM — CRACKED (BS 791)

DURING M CHECK, FOUND CRACK ON FLOORBEAM UPPER CAP AT RBL 5, FS 791. REPAIRED PER EA 11-150759.

Part: SKIN — CORRODED (FUSELAGE)

DURING M-CHECK, FOUND CORROSION ON FUSELAGE SKIN AT LOWER BEACON MOUNTING AREA. REPAIRED PER EA 11-150583.

Part: COMPRESSOR — STALLED (NR 2 ENGINE)

WHEN NR 2 ENGINE POWER ADVANCED TO 1.2 EPR AND STABLE FOR A CROSSBLEED START, THE NR 2 ENGINE COMPRESSOR STALLED. EGT WAS RISING THROUGH 680 CELSIUS WHEN THE ENGINE WAS SHUT DOWN. MAINTENANCE INSPECTED ENGINE PER MM 71-00-00 FOR STALL WITH NO DEFECTS NOTED. BORESCOPE REVEALED NO DEFECTS. EXACT PART CAUSING PROBLEM TO BE DETERMINED.

Part: EGT INDICATION — RISING (NR 3 ENGINE)

ON LANDING ROLLOUT WHILE COMING OUT OF REVERSE THRUST, THE NR 3 ENGINE EGT STARTED RISING RAPIDLY. THE ENGINE WAS SHUT DOWN WITH A MAX EGT OF 650C. MAINTENANCE CHECKED REVERSER OPERATION PER MM 78-30-00, WITH NO DEFECTS NOTED. EGT WAS WITHIN LIMITS PER MM 72-00-00, PG 227. AIRCRAFT WAS RETURNED TO SERVICE. EXACT PART CAUSING PROBLEM TO BE DETERMINED.

Part: SWITCH — MALFUNCTIONED (COCKPIT)

DURING TAKEOFF, RECEIVED THE GEAR WARNING AND 3 RED LIGHTS. RECYCLED GEAR AND RECEIVED 3 RED LIGHTS. REPLACED MAIN LANDING GEAR PROXIMITY CONTROL WITH NO HELP. NEXT FLIGHT DURING TAKEOFF, RED UNSAFE LIGHTS REMAINED ILLUMINATED. FOLLOWED COM AND VERIFIED LANDING GEAR UP AND LOCKED. REPLACED S1-342 THROTTLE SWITCHES.

Part: OIL PRESS TRANSM — FAILED (NR 3 ENGINE)

DURING TAKEOFF, THE NR 3 ENGINE OIL PRESSURE DROPPED TO 20 PSI. THE TAKEOFF WAS ABORTED AND AIRCRAFT RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 3 ENGINE OIL PRESSURE TRANSMITTER AND OIL PRESSURE INDICATOR. PERFORMED LEAK AND OPERATIONAL CHECK. CHECKS WERE NORMAL AND AIRCRAFT RETURNED TO SERVICE.

Part: COMPUTER — FAILED (LEFT)

DURING TAKEOFF, CAPTAIN'S AIRSPEED INDICATOR FROZE AT 100 KNOTS WHILE THE FIRST OFFICER'S INDICATOR READ 60 KNOTS. TAKEOFF WAS ABORTED. THE CAPTAIN'S AIR DATA COMPUTER WAS SWAPPED WITH THE NR 3 COMPUTER AND AIRCRAFT RETURNED TO SERVICE.

Part: COMPRESSOR — STALLED (NR 3 ENGINE)

DURING TAKEOFF, THE NR 3 ENGINE STALLED AND TAKEOFF WAS ABORTED. AIRCRAFT RETURNED TO GATE AND BORESCOPE OF NR 3 ENGINE REVEALED NO TROUBLE. REPLACED THE NR 3 EVC AND PRECISION TRIMMED. OPERATIONAL CHECK WAS NORMAL AND AIRCRAFT RETURNED TO SERVICE.

Part: LONGERON — CORRODED (FS 1509-1521)

DURING L-CHECK, FOUND CORROSION ON THE RBL 7 LONGERON FITTING FROM FS 1509 TO 1521 IN THE CENTER GEAR WHEEL WELL. REPLACED THE FITTING PER SRM 51-00-00 FIG 2.

Part: AIR DUCT — RUPTURED (NR 1 ENGINE REV)

DURING INITIAL CLIMB, THE NR 1 ENGINE EXPERIENCED THE REVERSER UNLOCK LIGHT ILLUMINATE THEN GO OUT FOLLOWED BY THE FIRE LIGHT AND BELL COMING ON. POWER WAS REDUCED TO IDLE AND THE LIGHTS EXTINGUISHED. THE ENGINE WAS SHUT DOWN AND THE FLIGHT RETURNED TO SEA WHERE AN UNEVENTFUL TWO ENGINE LANDING WAS MADE. THE FIRE BOTTLE WAS NOT DISCHARGED AND NO FUEL WAS DUMPED. THE 'S' DUCT AT THE PLUSSEY UNIT WAS FOUND RUPTURED. THE DUCT, RIGHT FAN COWL, VENT VALVE, AND THE REVERSER DIVE UNIT WERE REPLACED. THE SYSTEM CHECKED OK.