N617AL

Part: FIRESHIELD — MISALIGNED (ENGINE)

UNABLE TO FIT SHIELD TO GEARBOX, 6 PADS OFF CENTER TO FIRESHIELD.

Part: PUMP — INOPERATIVE (RTFUEL BOOST PMP)

DURING FLIGHT THE RIGHT FUEL BOOST PUMP LIGHT ILLUMINATED. REMOVED AND REPLACED THE RT FUEL BOOST PUMP. OPERATIONAL CHECK WAS GOOD. (K)

Part: HMU — FAILED (ENGINE)

DURING LEVEL FLIGHT RESTART FAULT LIGHT ILLUMINATED. RETURNED TO DEPARTURE AND NOTIFIED MAINTENANCE. REMOVED AND REPLACED HMU WITH SERVICEABLE UNIT IAW MM. OPS CHECK GOOD. (K)

Part: INDICATOR — FAILED (TORQUE)

ON CLIMB OUT FROM BASE, TORQUE GUAGE DROPPED TO 2 PERCENT. MAINTENANCE NOTIFIED. REMOVED AND REPLACED ENGINE TORQUE INDICATOR. C/W LEAK CHECK AND GROUND RUN, NOT DEFECTS NOTED. ALL WORK IAW MM. (K)

Part: TRANSMITTER — FAILED (TORQUE)

ON CLIMB OUT FROM BASE, TORQUE GAUGE GRADUALLY DECREASED TO ZERO. MAINTENANCE NOTIFIED. REMOVED TORQUE TRANSMITTER SN 57586518, AND INSTALLED SN 57292141. LEAK AND OPS CHECK GOOD. WORK IAW MM. (K)

Part: FITTING — BROKEN (SEAT) · airframe 6,200 hrs

TAB ON CASTING THAT HAS A NUTPLATE FOR THE SEAT PANEL SUPPORT IS CRACKED AND BROKEN / REPLACED WITH NEW FITTING

Part: PITCH LINK — BINDING (MAIN ROTOR) · airframe 6,026 hrs

SEVERE BINDING AND RATCHETING. REPLACED WITH NEW BY FIELD MAINTENANCE.

Part: LINK — CRACKED (MAIN ROTOR DRIVE) · airframe 5,528 hrs

FOUND P/C LINK BEARING BINDING; RATCHETY AND HAS AXIAL WEAR. REPLACED WITH NEW PART IN FIELD.

Part: GEAR — DEFECTIVE (GEARBOX) · airframe 5,295 hrs

REMOVED GEAR DUE TO UNEVEN WEAR PATTERN, REPLACED PART WITH NEW ITEM.

Part: GEAR — SPALLED (GEARBOX) · airframe 5,295 hrs

REMOVED GEAR DUE TO SPALLING AT LOW TIME, REPLACED PART WITH NEW ITEM.

Part: PINION GEAR — SPALLED (GEARBOX) · airframe 5,295 hrs

SPALLING ON GEAR TEETH, THIS IS A RECURRING PROBLEM IN C47B GEARBOXS, WHERE PINION GEARS WEAR PREMATURELY. REPLACED WITH NEW GEAR.

Part: SKID — BROKEN (VERTICAL STAB) · airframe 5,075 hrs

THE TAIL SKID BROKE AT RETAINING HOLE AND A PORTION OF SKID DEPARTED AIRCRAFT. FATIGUE CRACK APPEARS TO HAVE STARTED AT RETAINING HOLES AND PROGRESSED AROUND BETWEEN 2.25.

Part: BEARING — BINDING (M/R DRIVE) · airframe 4,994 hrs

BEARING ROUGH AND BINDING.

Part: BEARING — SEIZED (MAIN ROTOR) · airframe 4,188 hrs

FOUND BEARING WORN, RATCHETING AND SEIZED IN SMALL ARC OF TRAVEL. BEARING REPLACED BY (FIELD) MAINT.

Part: CHANNEL — CRACKED (FIREWALL)

DURING DAILY INSPECTION, 3 INCH CRACK IN RADIUS OF CHANNEL, WAS FOUND. CRACK STARTS BOTTOM OF CHANNEL AND GOES UP 3 INCHES JUST ABOVE RECEPTACLE DOUBLER. C/A: INSTALL STAINLESS STEEL DOUBLER.

Part: SUPPORT ANGLE — CRACKED (TAILBOOM)

DURING DAILY INSPECTION, CRACKED IN RADIUS DUE TO POOR FIT. LEFT LOWER SUPPORT ANGLE FOR HORIZONTAL STABILIZER. TB 4070133 WAS CW AT THIS DATE.

Part: BEARING — FAILED (T/R DRIVESHAFT)

IN FLIGHT AIRCRAFT DEVELOPED EXCESSIVE VIBRATION. BEARING FAILURE. (THE BEARING WAS LUBRICATED AT AIRCRAFT TT 2920.31.)

Part: BEARING — DELAMINATED (MAIN ROTOR)

ON DAILY INSPECTION, DELAMINATED ELASTOMER ON BEARING.

Part: SHAFT — WORN (FREEWHEEL UNIT)

AT OVERHAUL, DRIVE SPLINES WORN BELOW MINIMUM LIMITS. (M)

Part: SLEEVE — CONTAMINATED (BYPASS SPOOL) · airframe 1,331 hrs

ATTEMPTED TAKEOFF, COLLECTIVE LEVER MOVEMENT WAS RESTRICTED. TAKEOFF ABORTED, COLLECTIVE SERVO REPLACED. SHOP INSPECTION REVEALED SERVO BYPASS SPOOL WAS BINDING IN BYPASS SPOOL SLEEVE. THIS CAUSED PRIMARY CONTROL SPOOL HYDRAULIC NULL TO SHIFT LIMITING SERVO ACTUATOR MOVEMENT. SPOOLS AND SLEEVE CONTAMINATED WITH SOME TYPE OF COATING. THIS COATING COULD NOT BE SEEN, BUT WAS WASHED OFF. NORMAL SPOOLS AND SLEEVE OPERATION RESTORED. CAUSE UNKNOWN. (X)