N420MB

Part: DOOR — MISSING (HYDRAULIC BAY) · airframe 14,081 hrs · 48,502 cycles

THE PILOT NOTICED THAT THE HYD INSPECTION DOOR ON THE FWD TRANSMISSION DECK CREST COWLING WAS MISSING FROM THE ACFT DURING A PREFLIGHT INSPECTION. OBTAINED & INSTALLED A SERVICEABLE INSPECTION DOOR. NO OTHER INFORMATION IS KNOWN AT THIS TIME CONCERNING THE WHEREABOUTS & CAUSE OF THIS INSPECTION DOOR SEPARATING FROM THE ACFT.

Part: SPAR — CRACKED (TAILBOOM) · airframe 13,065 hrs · 45,728 cycles

DURING INSPECTION, FOUND A CRACK IN THE TAILBOOM VERTICAL FIN MAIN SPAR. OPEN.

Part: FRAME — CRACKED (CONTROL ROD) · airframe 12,969 hrs · 45,458 cycles

THE MECHANIC FOUND A CRACK IN THE TAILBOOM AT FRAME 10L, DURING A SCHEDULED INSP.

Part: CHIP DETECTOR — CONTAMINATED (NR 2 ENGINE) · airframe 12,707 hrs · 44,752 cycles

NR 2 ENGINE CHIP LIGHT ILLUMINATED ALONG WITH THE MASTER CAUTION LIGHT. PILOT NOTED THAT THERE WERE NO N2 FLUCTUATIONS. AIR RETURNED AND ATTEMPTED A CHIP BURN WITH NEGATIVE RESULTS. PERFORMED SHUTDOWN OF THE NR 2 ENGINE. LANDED WITHOUT INCIDENT. MECHANIC CALLED OUT TO ACFT & FOUND ONE SMALL PIECE OF DEBRIS IN THE CHIP DETECTOR. IAW MM, THIS CHIP WAS CATEGORIZED AS A MINOR CHIP-TYPE 2. ONCE THE CHIP WAS REMOVED, THE ACFT WAS GROUND RUN FOR TEN MINUTES WITH NO DEFECTS. THE ACFT WAS THEN RETURNED TO SERVICE.

Part: ANTENNA — INOPERATIVE (WX RADAR)

WEATHER RADAR ANTENNA INOPERATIVE, HEADING ERROR MESSAGE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: THERMOCOUPLE — SHORTED (ENGINE)

THERMOCOUPLE HAS AN INTERNAL SHORT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL — LEAKING (NR 2 BEARING)

NUMBER 2 BEARING SEAL IS LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT CORRECTED PROBLEM.

Part: BELLOWS — TORN (SWASHPLATE)

BELLOWS WAS TORN AROUND CLAMP AND FOLD AREAS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: COWLING — WORN (FUSELAGE)

CATCHER/CREST COWLING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)

Part: SPRING — WORN (SEAL RING EXPAND)

SEAL RING EXPANDER - SPRING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)

Part: SEAL — WORN (TURBINE SHROUD)

FIRST TURBINE SHROUD, SEAL RING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)

Part: MANIFOLD — MALFUNCTIONED (ENGINE FUEL) · airframe 8,213 hrs

FUEL MANIFOLD ASSEMBLY CAUSES ENGINE TO RUN HOT. (X)

Part: SEAL — LEAKING (NR 2 BEARING)

SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL — LEAKING (NR 3 BEARING)

SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL RING — WORN (TURBINE SECTION)

SEAL RING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SPRING — WORN (TURBINE SECTION)

SPRING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: BEARING — WORN (ENGINE)

BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL ASSY — DAMAGED (LABYRINTH)

EXCESSIVE WARPAGE WHICH RESULTED IN COLLATERAL DAMAGE TO THE GP ROTOR AND SHROUD. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SHROUD — DAMAGED (GAS PRODUCER)

SECONDARY DAMAGE TO LAB SEAL FAILURE. EXCESSIVE GROOVES RESULTING FROM GP BLADE DAMAGE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: BLADE — DAMAGED (GAS PRODUCER)

SECONDARY DAMAGE TO LAB SEAL FAILURE. EXCESSIVE DAMAGE TO KNIFE EDGES AND GP BLADES. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES: 1,061.9.

Part: LABYRINTH SEAL — WARPED (GAS PRODUCER)

LABYRINTH SEAL HAD EXCESSIVE WARPAGE WHICH RESULTED IN COLLATERAL DAMAGE TO THE GP ROTOR AND SHROUD. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: ROTOR ASSY — DAMAGED (GAS PRODUCER)

SECONDARY DAMAGE TO LAB SEAL FAILURE. EXCESSIVE DAMAGE TO KNIFE EDGES AND GP BLADES. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. PART TC: 1,061.9.

Part: SHAFT — DAMAGED (COMPRESSOR)

SECONDARY DAMAGE TO LAB SEAL FAILURE. REPALCED WITH NEW UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES: 4270.

Part: BLADE — CRACKED (M/R)

FAILED BLADE INSPECTION. EXCESSIVE SKINS CRACKS AND BULGING. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: BLADE — CRACKED (M/R)

FAILED BLADE INSPECTION. EXCESSIVE SKINS CRACKS AND BULGING. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL RING — WORN (TURB SHROUD)

SEAL RING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.

Part: SEAL — LEAKING (CSD LIP)

SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL — LEAKING (NR 3 BEARING)

SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL — LEAKING (ACCESSORY DRV)

SEALS LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH 3 EACH NEW UNITS, CORRECTED PROBLEM.

Part: SEAL — LEAKING (ALTERNATOR FWD)

SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL — LEAKING (ALTERNATOR AFT)

SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: ROTOR ASSY — BLADE SHIFT (POWER TURBINE)

FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT NR 25 +0.012 INCH. NR 24 +0.012 INCH. REPLACED WITH USED UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES, 3,601.2.

Part: GYRO — STUCK (COCKPIT)

GYRO STUCK. READS 3.42 VOLTS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

Part: SEAL RING — WORN (1ST TURB SHROUD)

SEAL RING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM. ENGINE TOTAL CYCLES, 8,721.5.

Part: BEARING — WORN (TURBINE NR 3)

BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. ENGINE TOTAL CYCLES, 8,721.5.

Part: BEARING — WORN (COMPRESSOR NR 1)

BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. ENGINE TOTAL CYCLES, 8,721.5.

Part: ROTOR ASSY — BLADE SHIFT (RT ENG TURB)

FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT NR 5, MINUS 0.017 INCH, NR 8, MINUS 0.011 INCH, NR 9, MINUS 0.009 INCH, NR 12, MINUS 0.010 INCH. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM. PART TOTAL CYCLES, 2920.6.

Part: ROTOR ASSY — BLADE SHIFT (LT ENG TURB)

FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT NR 5, PLUS 0.012 INCH, NR 26, PLUS 0.009 INCH. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM. PART TOTAL CYCLES, 5788.1.

Part: SEAL — LEAKING (NR 2 BEARING)

NR 2 BEARING SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.

Part: SEAL — LEAKING (GOV FCU STARTER)

ACCESSORY DRIVE SEALS LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH 3 EACH NEW UNIT(S) CORRECTED PROBLEM.

Part: SEAL — LEAKING (NR 3 BEARING)

NR 3 BEARING SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.

Part: BEARING — ROUGH (RED GEARBOX)

ANNULAR BALL BEARING ROUGH. REPLACED WITH 4 EACH NEW UNIT(S) CORRECTED PROBLEM.

Part: SEAL RING — WORN (1ST TURB SHROUD)

FIRST TURBINE SHROUD SEAL RING WORN BEYOND SERVICEABLE LIMITS.

Part: BULB — PIN BROKE (ANTI COLL)

ANODE PIN BROKE OFF DURING LAMP REPLACEMENT. XENON TUBE DID NOT BURST. REPLACED WITH NEW UNIT(S), CORRECTED PROBLEM.

Part: SEAL RING — WORN (1ST TURB SHROUD)

FIRST TURBINE SEALS WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW 2 EACH UNITS(S) CORRECTED PROBLEM.

Part: ROTOR ASSY — BLADE SHIFT (RT ENG TURB)

FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT NR 7, PLUS 0.011 INCH, NR 12, PLUS 0.018 INCH, NR 17, PLUS 0.010 INCH, NR 18, PLUS 0.010 INCH. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM. PART TOTAL CYCLES, 5811.3.

Part: GYRO — DEFECTIVE (YAW CSAS)

GYRO UNIT REMOVED BECAUSE OF YAW CSAS KICK. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.