N54191

Part: FILTER ASSEMBLY — MALFUNCTIONED (ENGINE OIL)

FILTER ASSEMBLY WILL NOT BYPASS.

Part: SWITCH — FAILED (OIL SYSTEM)

OIL LIGHT WOULD NOT ILLUMINATE WHEN BATTERY SWITCHED TO ON POSITION.

Part: ENCODER — INOPERATIVE (ALTIMETER)

ALTIMETER HAS NO ENCODER OUTPUT.

Part: VALVE — STICKING (OIL SYSTEM)

VALVE STICKS IN OPEN POSITION.

Part: BELLCRANK — WORN (TAIL ROTOR)

BELLCRANK ASSY HAS WORN BEARING BORE HOLE.

Part: ENCODER — MALFUNCTIONED (COCKPIT)

ENCODER DOES NOT HOLD CALIBRATION SLOW TO RESPOND.

Part: ENCODER — FAILED (COCKPIT ALT)

ENCODER GIVES NO VALID OUTPUT.

Part: AC REGULATOR — FAILED (AC VOLTAGE SYS)

UNABLE TO ADJUST VOLTAGE. REGULATOR FAILED.

Part: ELT — FAILED (BATTERY)

BATTERY INOPERATIVE. TIME SINCE REPAIR 0:00.

Part: ELT — FAILED (COCKPIT)

ELT COMES ON INTERMITTENTLY.

Part: SWITCH — DEFECTIVE (ELT)

SWITCH CAUSES ELT TO GO OFF ALL THE TIME.

Part: ELT — FAILED (COCKPIT)

INADVERTENT ACTIVATION FOR UNKNOWN PERIODS OF TIME.

Part: POWER SUPPLY — FAILED (STROBE)

ANTI COLLISION LIGHT INOPERATIVE.

Part: ELT — FAILED (COCKPIT)

NARCO ELT TRANSMITS SIGNAL INADVERTANTLY.

Part: ELT — DEFECTIVE (COCKPIT)

NARCO ELT TRANSMITS SIGNAL INADVERTANTLY.

Part: LORAN — FAILED (COCKPIT)

KLN88 NO DISPLAY.

Part: ELT — FAILED (COCKPIT)

ELT ACTIVATES WITH SWITCH IN ARMED POSITION.

Part: INDICATOR — FAILED (MAST MOMENT)

LIGHT DOES NOT COME ON.

Part: TRANSMITTER — FAILED (MAST MOMENT)

MAST MOMENT LIGHT DOES NOT COME ON.

Part: LORAN — DEFECTIVE (COCKPIT)

LORAN BACK LIGHTING INOPERATIVE ON THREE BUTTONS AND UNIT DROPPING OFF LINE WHEN VIBRATED.

Part: OIL PUMP — SCARRED (M/R)

OIL PUMP SCARRED INTERNAL BUSHING.

Part: CENTER CASE — BORE WORN (M/R XMSN)

CENTER CASE OUTPUT BORE WORN, CORROSION ON BASE FLANGE AND WEAR STEP ON SUPPORT PINS AND NOZZLE RING SURFACE.

Part: CONTROL UNIT — SHAFT FAILED (COCKPIT)

SELECTOR CONTROL KNOB AND SHAFT PULLED OUT OF CONTROL. PERFORMED PRELIMINARY INSPECTION, FOUND RETAINING RING MISSING. INSTALLED NEW RETAINING RING P/N 090-0036-04. REPAIRED. BENCH CHECK GOOD.

Part: TRANSMITTER — FLUCTUATES (FUEL PRESS)

FLUCTUATING OUTPUT WHEN UNIT IS VIBRATED.

Part: BLADE — SEPARATION (M/R)

M/R BLADE SEPARATION ON THE LEADING EDGE ABRASION STRIPS BEYOND LIMITS. THE SEPARATION ARE ON THE INBOARD STRIP AND THE TWO CENTER STRIPS.

Part: INDICATOR — ERRATIC (COCKPIT)

NEEDLE HAS AN ERRATIC INDICATION. TIME SINCE REPAIR 0:00.

Part: RECEIVER — DEFECTIVE (COCKPIT VOR)

VOR BEARING OUT OF TOLERANCE. 24 MONTH INSPECTION DUE.

Part: TURBINE — SEIZED (ECU EQUIP)

TURBINE WILL NOT ROTATE AND TO COMPLY WITH SB.2200850-21-92019 AND SB.204755-21-92046.

Part: INDICATOR — ERROR (COCKPIT TOT)

NEEDLE HAS EXCESSIVE FRICTION ERROR AND INDICATES 45 DEGREES AT ZERO.

Part: BLADE — CRACKED (M/R)

BLADE NOSE AND NECK SHELLS CRACKED AT THE CUFF AREA)

Part: LORAN — MALFUNCTION (COCKPIT)

LORAN NO SCREEN INDICATION.

Part: WHEEL — BLADES FAILED (2ND STAGE)

ENGINE REMOVED DUE TO ENGINE FAILURE ON RUN-UP. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: 100% OF 1ST STAGE WHEEL BLADE TIPS FAILED .450" OUTBOARD FROM HUB TO BLADE TIP LEADING EDGE DUE TO THERMAL FATIGUE CAUSED BY ENGINE OPERATING IN AN OVERTEMPERATURE CONDITION AND 94% OF 2ND STAGE WHEEL BLADE TIPS FAILED .781" OUTBOARD FROM HUB TO BLADE TIP LEADING EDGE. SCRAPPED 1ST AND 2ND STAGE WHEELS. SEE MMIR #5120 FOR 2ND STAGE WHEEL INFORMATION.

Part: WHEEL — BLADES FAILED (1ST STAGE)

ENGINE REMOVED DUE TO ENGINE FAILURE ON RUN-UP. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: 100% OF 1ST STAGE WHEEL BLADE TIPS FAILED .450" OUTBOARD FROM HUB TO BLADE TIP LEADING EDGE DUE TO THERMAL FATIGUE CAUSED BY ENGINE OPERATING IN AN OVERTEMPERATURE CONDITION AND 94% OF 2ND STAGE WHEEL BLADE TIPS FAILED .781" OUTBOARD FROM HUB TO BLADE TIP LEADING EDGE. SCRAPPED 1ST AND 2ND STAGE WHEELS. SEE MMIR #5121 FOR 2ND STAGE WHEEL INFORMATION.

Part: POWER SUPPLY — INOPERATIVE (STROBE)

INOPERATIVE. TIME SINCE REPAIR 21:15.