N376AL

Part: CONNECTOR — CONTAMINATED (FIRE TEE HANDLE)

DURING THE PRESTART CHECKS. THE FIRE T HANDLE FOR THE NR 1 ENGINE WOULD NOT TEST. WATER FOUND IN SYSTEM CONNECTORS, CONNECTORS DRIED AND REINSTALLED, SYSTEM CHECKED GOOD.

Part: CHIP DETECTOR — ACTIVATED (NR 2 ENGINE)

DURING FLIGHT, NR 2 ENGINE CHIP LIGHT ILLUMINATED AND WOULD NOT RESET, BEEPED NR 2 ENGINE ALL THE WAY BACK AND FLEW APPROXIMATELY 20 MINUTES SINGLE ENGINE AND PERFORMED RUN ON LANDING AT ARA. UPON LANDING NR 2 ENGINE WAS REMOVED.

Part: CONNECTOR — LOOSE (COCKPIT)

PRESTART CHECK. NR 1 ENGINE FIRE DETECTION SYSTEM WILL NOT TEST. CIRCUIT BREAKER FOUND POPPED, LOOSE CONNECTION IN T HANDLE FOR BULBS.

Part: PINION GEAR — SPALLED (N2 GEAR TRAIN)

UPON DISASSEMBLY OF GEARBOX FOR METAL. FOUND SPALLING AND GALLING ON GEAR TEETH CAUSING METAL CONTAMINATION AND DAMAGE TO T/M GEAR PN E6893673 S/N PG4068. ASSURE PROPER MACHINING AND MESHING OF GEAR TEETH AT FACTORY.

Part: ENGINE — FAILED (NR 2)

IN CRUSE FLIGHT A LOUD NOISE WAS HEARD AND SHARP YAW WAS EXPERIENCED. NR 2 N1 WAS AT 10 PERCENT, T5 WAS INCREASING THROUGH 800 DEGREES C AND NR 2 FIRE LIGHT ILLUMINATED. FAILED ENGINE WAS VERIFIED AND EMERGENCY CHECK LIST FOLLOWED. PRELIMINARY UNCONTAINED BURST OF ONE OR MORE TURBINE WHEELS, ENGINE HAS NOT BEEN EVALUATED.

Part: CONNECTOR — DIRTY (PROX SWITCH)

ON TAKEOFF, LANDING GEAR WOULD NOT RETRACT. FOUND ''UP'' PROXIMITY SWITCH CANNON PLUG ON NOSE GEAR ACTUATOR DIRTY. CLEANED AND REINSTALLED. (X)

Part: SPOOL BUSHING — FAILED (GOVERNOR)

GOVERNOR REMOVED FOR TORQUE FLUCTUATION. UPON INSPECTION IN SHOP, FOUND BALL BEARING THAT FELL OUT OF GOVERNOR COVER WHILE STILL ASSEMBLED. SPLIT GOVERNOR BODY IN SHOP AND DISCOVERED SPOOL BUSHING HAD FAILED.

Part: PYLON — CORROSION (T/R)

DURING MAJOR AIRFRAME INSPECTION, FOUND CORROSION ON PYLON SKIN AND STRAPS P/N 78286-76070-20086-101, -102. PARTS WERE CONSIDERED UNSERVICEABLE AND REPLACED. EXHAUST GASES COULD HAVE POSSIBLY ACCELERATED THE CORROSION PROCESS. REGULAR CLEANING OF TAIL AND APPLICATION OF CPC.

Part: BEARING CONE — FAILED (INPUT GEARBOX)

ON GROUND RUN UP, HAD BEARING FAILURE IN INPUT QUILL ASSEMBLY. COMPONENT P/N 7635705000041.

Part: BEARING CUP — FAILED (INPUT GEARBOX)

ON GROUND RUN UP, HAD BEARING FAILURE IN INPUT QUILL ASSEMBLY. COMPONENT P/N 7635705000041.

Part: BLADE — DEBONDED (M/R)

DISCOVERED DURING 500-HOUR INSPECTION, M/R BLADE TIP RIB STRAP AND DOUBLERS DEBONDED.

Part: ANGLE — CORRODED (VERT PYLON)

MAJOR IN SPECTION, FOUND VERT PYLON ANGLE CORRODED BEYOND LIMITS, IMPROPER CORROSION PREVENTION, INNER GRANULAR CORROSION, NORMAL WEAR AND TEAR.

Part: BULKHEAD — CRACKED (VERT PYLON)

MAJOR INSPECTION, FOUND VERT PYLON BULKHEAD CRACKED, NORMAL WEAR AND TEAR.

Part: WEB DOUBLER — CRACKED (VERT PYLON)

MAJOR INSPECTION, FOUND VERT PYLON WEB DOUBLER CORRODED AND CRACKED, NORMAL WEAR AND TEAR.

Part: RIB — CRACKED (VERT PYLON)

MAJOR INSPECTION, FOUND VERT PYLON RIB CRACKED, NORMAL WEAR AND TEAR.

Part: CAP ANGLE — CORRODED (VERT PYLON)

MAJOR INSPECTION, FOUND VERT PYLON CAP ANGLE CORRODED BEYOND LIMITS, INNER GRANULAR CORROSION, IMPROPER CORROSION PREVENTION, NORMAL WEAR AND TEAR.

Part: FITTING — DEFECTIVE (VERT PYLON)

MAJOR INSPECTION, VERT PYLON FITTING BOLT HOLE DIAMETER BEYOND LIMITS. NORMAL WEAR AND TEAR.

Part: DOUBLER — CRACKED (VERT PYLON)

MAJOR INSPECTION, FOUND VERT PYLON DOUBLER CRACKED, NORMAL WEAR AND TEAR.

Part: SHEAR DECK — CRACKED (VERT PYLON)

MAJOR INSPECTION, FOUND VERTICAL PYLON SHEAR DECK CRACKED, NORMAL WEAR AND TEAR.

Part: ANGLE — CORRODED (VERT PYLON)

MAJOR INSPECTION, FOUND VERT PYLON LT ANGLE CORRODED BEYOND LIMITS, INNER GRANULAR CORROSION, NORMAL WEAR AND TEAR.

Part: BULKHEAD — CORRODED (VERT PYLON)

MAJOR INSPECTION, FOUND VERT PYLON BULKHEAD CORRODED BEYOND LIMITS, INNER GRANULAR CORROSION, NORMAL WEAR AND TEAR.

Part: RIB — CRACKED (VERT PYLON)

MAJOR INSPECTION, VERTICAL PYLON RIB CORRODED INNER GRANULAR, CRACKED, NORMAL WEAR AND TEAR.

Part: WEB — CRACKED (VERT PYLON)

MAJOR INSPECTION, FOUND VERT PYLON WEB CORRODED AND CRACKED, NORMAL WEAR AND TEAR

Part: BLADE SPAR — CRACKED (M/R)

DISCOVERED DURING 500-HOUR INSPECTION, BLADE SPAR CRACKED AT ROOT END BUSHING HOLE.

Part: TUBE ASSY — CHAFED (NR 1 HYD PUMP)

DURING GROUND RUN, NR 1 SERVO CAUTION LIGHT ILLUMINATED. AIRCRAFT WAS SHUT DOWN. DURING TROUBLESHOOTING, HYDRAULIC LINE WAS FOUND CHAFING ON THE FIREWALL. REPLACED LINE ASSY. SERVICED AND GROUND RUN. LEAK CHECK OK.

Part: PISTON — BOLT BROKEN (BOOT STRAP)

DURING SHOP INSPECTION (3,000-HOUR) AND REPAIR AND AFTER UPGRADE TO DASH 104 ASSEMBLY DURING BENCH TESTING, FOUND BOOT STRAP PISTON RESTRAINING BOLT (PN MS24678-9) BROKEN AND RETAINER PLATE (PN 0711311-209) DEFORMED DURING DISASSEMBLY OF MODULE. THESE DAMAGED PARTS WERE REPLACED DURING UPGRADE OF MODULE ASSY FROM DASH 103 TO DASH 104 CONFIGURATION.

Part: HOUSING — CORRODED (T/R DRIVESHAFT)

DISASSEMBLY FOR REPAIR FOUND EXCESSIVE CORROSION ON MOUNT LUGS BEYOND MANUFACTURER'S CLEAN-UP LIMITS.

Part: TRANSMITTER — FAILED (TRANSMISSION)

AFTER LANDING, NOTICED THE TRANSMISSION OIL PRESSURE HAD DROPPED OUT OF THE GREEN AND THEN DROPPED TO ZERO PSI. REPLACED TRANSMISSION OIL PRESSURE TRANSMITTER.