N91070

Part: TURBINE ROTOR — FAILED (NR 2 ENGINE)

NR 2 ENGINE OIL PRESSURE BEGAN TO FLUCTUATE IN CRUISE. LANDED WITHOUT INCIDENT. OIL LEVEL ONE AND ONE-HALF QUARTS LOW ON OIL. NO LEAKS NOTED. RE-SERVICED AND RETURNED TO SERVICE AFTER PENALTY RUN AND CHECK. FOLLOW-UP CHECK REVEALED ENGINE OIL CONSUMPTION. REPLACED TURBINE ROTOR ASSEMBLY.

Part: STARTER — OVERHEATED (START/GEN)

EVIDENCE OF OVERHEATING ON TERMINAL BLOCK.

Part: TRANSCEIVER — FAILED (COCKPIT VHF)

TRANSCEIVER CAN'T RECEIVE OR TRANSMIT.

Part: SWITCH — FAULTY (OIL PRESSURE)

TRANSMISSION PRESSURE LIGHT WILL NOT GO OUT.

Part: SWITCH — INOPERATIVE (OIL PRESSURE)

OIL PRESSURE SWITCH UNIT WOULD NOT COME ON WITH BATTERY SWITCH.

Part: FLOOR PANEL — CORRODED (CABIN FLOOR)

FLOOR PANEL CORRODED AND SEPARATED.

Part: INDICATOR — READS HIGH (TRIPLE TACH)

NR 1 NEEDLE STICKS AND STAYS 2 PERCENT HIGHER THAN OTHER NEEDLES.

Part: INDICATOR — DEFECTIVE (COCKPIT)

HSI INDICATOR HAS LOOSE PARTS INSIDE.

Part: FIRE CONT UNIT — MALFUNCTION (LT ENG)

L/H ENGINE FIRE LIGHT INTERMITTENTLY STICKS ON.

Part: BLADE — ERRODED (T/R)

PAINT EROSION AT BLADE TIP ON S/N 646. PAINT EROSION AND RUBBER COATING PEELED OFF AT BLADE TIP ON S/N 655.

Part: TRANSMITTER — FAILED (FUEL PRESS)

PRESSURE DROPS TO ZERO.

Part: TRANSDUCER — FAILED (FUEL PRESS)

TRANSDUCER TRANSMITS OUT OF TOLERANCE THROUGHOUT SCALE.

Part: TRANSDUCER — FAILED (FUEL PRESS)

TRANSDUCER INTERNALLY SHORTED.

Part: TRANSDUCER — SHORTED (FUEL PRESS)

TRANSDUCER INTERNALLY SHORTED.

Part: TRANSDUCER — FAILED (FUEL PRESS)

TRANSDUCER NO PRESSURE INDICATION. CAUSES THE GAUGE TO PEG TO ZERO SIDE ALL THREE PRESSURE BOTH ENGINES AND TRANS. INDICATOR ON SAME GAUGE.

Part: TRANSDUCER — FAILED (FUEL PRESS)

TRANSDUCER HAS NO PRESSURE INDICATION.

Part: OIL COOLER — LEAKING (ENGINE)

OIL COOLER WAS REPAIRED BY VENDOR ON 6-11-97. FOUND LEAKING AT TWO PLACES.

Part: OIL COOLER — LEAKING (ENGINE)

OIL COOLER LEAK AT LOW CENTER RIGHT SIDE.

Part: TORQUEMETER — MALFUNCTION (COCKPIT)

DUAL TORQUE METER RANGE MARKING PAINT FLAKING. NR1 TORQUE NEEDLE BOUNCES DURING FLIGHT.

Part: PLANETARY AXLE — SPALLED (XMSN)

SPALLING. REPLACED WITH SERVICEABLE AXLE.

Part: SUN GEAR — SPALLED (M/R XMSN)

SPALLING. REPLACED WITH SERVICEABLE PART.

Part: CLUTCH — BROKEN (CAGE)

FREEWHEEL CLUTCH HAS BROKEN CAGE.

Part: SHAFT — CRACKED (T/R)

PLATING PEALING MICRO CRACKS ON JOURNAL D & F.

Part: SERVO MOTOR — INTERMITTENT (FUEL CONTROL)

SERVO MOTOR WORKS INTERMITTENTLY.

Part: CLUTCH — BROKEN (FREEWHEEL)

BROKEN CAGE. REPLACED WITH NEW CLUTCH. ALSO PINION P/N 4638202002, S/N 488, T.T. UNKNOWN AND F/W OUTER SHAFT P/N 4638302045, S/N 315, T.T. UNKNOWN REPLACED DUE TO DAMAGE CAUSED BY CLUTCH FAILURE.

Part: TRANSCEIVER — FAILED (COCKPIT)

WILL NOT TRANSMIT OR RECEIVE. NO DISPLAY. DISPLAY BOARD BURNT.

Part: OIL COOLER — CRACKED (ENG OIL)

OIL COOLER CRACKED.

Part: CLUTCH — BROKEN CAGE (FREEWHEEL)

FREEWHEEL CLUTCH HAS BROKEN CAGE.

Part: SHAFT — PITTED (TAIL ROTOR)

T/R SHAFT PITTING PITTING AT INBOARD BEARING JOURNAL.

Part: INDICATOR — READS HIGH (EXH TEMP)

READS 20 DEGREES HIGH AND WON'T CALIBRATE.

Part: LORAN — DEFECTIVE (COCKPIT)

TAKES LONG TIME TO COME ON AND GOES OUT DURING FLIGHT.

Part: CLUTCH — WORN (FREEWHEEL)

INNER CAGE WORN BEYOND LIMITS. REPLACED WITH SERVICEABLE CLUTCH.

Part: PACK ASSY — DEFECTIVE (HYD SYSTEM)

DURING CRUISE FLIGHT, NOSE OF AIRCRAFT SUDDENLY PITCHED NOSE DOWN, HYDRAULIC BLOCK LIGHT ILLUMINATED, MAST MOMENT INDICATOR LIGHT ILLUMINATED. AFTER RECOVERY TO LEVEL ATTITUDE, AIRCRAFT LANDED WITHOUT INCIDENT.

Part: SWITCH — MALFUNCTION (NR 2 ENG PRESS)

#2 ENGINE DIFFERENTIAL PRESSURE SWITCH WOULD NOT FUNCTION CHECK AS PER BO-105 M & O CHAPTER 62 PAGE 43 PARA. 62-39 ITEM #2. REPLACED DIFFERENTIAL PRESSURE SWITCH.

Part: TRANSDUCER — DEFECTIVE (FUEL SYS)

READS HIGH OUT OF TOLERANCE.

Part: INDICATOR — READS HIGH (COCKPIT EXH TEMP)

NEEDLE INDICATES 20 DEGREES CELSIUS HIGH THROUGHOUT SCALE.

Part: WHEEL — SULFIDATION (3RD STAGE)

ENGINE REMOVED DUE TO HIGH TOT. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: SULFIDATION ON ALL 3RD STAGE WHEEL BLADE LEADING EDGES AND OUTER BAND I.D. SCRAPPED 3RD STAGE WHEEL.

Part: WHEEL — SULFIDATION (1ST STAGE BLADES)

ENGINE REMOVED DUE TO HIGH TOT. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: SULFIDATION ON 1ST STAGE WHEEL BLADES. SCRAPPED 1ST STAGE WHEEL.

Part: BLADE — DETERIORATION (T/R)

RUBBER DETERIORATION.

Part: BLADE — DAMAGED (T/R)

DAMAGE ON TRAILING EDGE.

Part: CLUTCH — CRACKED (FREEWHEEL)

UPON 1200 HOUR INSPECTION FOUND SPRAG RETAINER CRACKED AND WORN BEYOND LIMITS. REPLACED WITH SERVICEABLE CLUTCH ASSEMBLY.