N1174U

Part: INDICATOR — FLUCTUATES (ENGINE TORQUE) · airframe 6,695 hrs · 22,330 cycles

MADE THE FIRST LEG FROM BASE TO HOSPITAL, LANDED FINE, KEPT BOTH ENGINE RUNNING AT IDLE, PATIENT LOADED, READY TO GO, HOVER CHECK WITH BOTH ENG NR 1 & NR 2 TORQUE NEEDLE MATCH AT 60 PERCENT, MAX PERFORMANCE TAKEOFF TO ABOUT 150FT OGE, ENG NR2 TORQUE GAUGE DROPPED TO 0 AND ENG NR1 TOT 800C, GOT IN CRUISE, ENGINE ANALYSED, TORQUE NEEDLE NR2 FLUCTUATING, NO OTHER INDICATIONS, NP ENG 1 & 2 AT 101 PERCENT, NO WARNING LIGHTS, NO TONES. ALL FINE. CONTINUE IN CRUISE 2500FT WITH 40 PERCENT TORQUE BUT TOT ENG NR1 UP AT 700-750C. TORQUE NEEDLE ENG NR2 CONTINUE FLUCTUATING THE ENTIRE FLIGHT FROM 0 TO 40-60 PERCENT TORQUE, CONTINUED TO THE AIRPORT/PROGRAM BASE LOCATION AND MADE A SHALLOW APPROACH WITH NORMAL LANDING IN A HOVER. MED CREWS SWAPPED THE PATIENT OVER TO OTHER HELICOPTER AND OFF THEY WENT TO THE HOSPITAL. ALL WORKED OUT WELL. MECHANIC ON SITE AND DECISION MADE TO REMOVE ACFT FROM SERVICE FOR FURTHER INSPECTION AND TROUBLESHOOTING.

Part: GEARBOX — MAKING METAL (TAIL ROTOR) · airframe 6,649 hrs

PILOT REPORTED A TAIL ROTOR CHIP LIGHT FLICKER AND THE LIGHT WENT ON SOLID AT LANDING. PILOT CALLED THE MECHANIC WHO INSPECTED THE CHIP DETECTOR AND FOUND A CHIP. MECHANIC THEN DRAINED THE GEAR BOX, SERVICED AND DID A 30 MINUTE GROUND RUN. INSPECTED THE CHIP DETECTOR AND FOUND METAL PARTICLES. THE GEARBOX WAS THEN DRAINED AGAIN AND METAL PARTICLES WERE FOUND IN THE OIL. THE ACFT IS OUT OF SERVICE AND AN O/H GEARBOX AND TOOLS ARE BEING SENT TO REPLACE THIS TAIL ROTOR GEARBOX.

Part: FLOOR PANEL — CRACKED (BS 6750) · airframe 6,640 hrs · 22,130 cycles

CRACK DISCOVERED DURING INSP ON AFT DECK AT STA 6750, BL 500, AND WL 2620. ACFT BEING FERRIED TO FACILITATE REPAIR.

Part: STRUCTURE — CRACKED (TAIL BOOM) · airframe 6,640 hrs · 22,130 cycles

CRACK DISCOVERED DURING INSPECTION ON VERTICAL FIN CAP AT STA 10950, BL 20, AND WL 4050. ACFT BEING FERRIED TO FACILITATE REPAIR.

Part: BOLT — MISINSTALLED (HYD PACK MOUNT) · airframe 6,273 hrs

FOUND HARDWARE INSTALLED INCORRECTLY CAUSING: WEAR IN THE HYD PACK AND MOUNT HOLES. CRACKS IN THE CABIN FLOOR AND CROSS STRUCTURE SUPPORT IN THE CABIN CEILING UNDER THE HYD PACK. AFT HYD MOUNT ON DECK HAS WEAR IN THE BUSHING HOLES 0.100" THICK, FITTING DAMAGE IN 0.025" DEEP.

Part: SLEEVE — WORN (T/R SHAFT) · airframe 6,273 hrs

PILOT FELT BINDING IN TAIL ROTOR CONTROLS IN HOVER, MX IS TROUBLESHOOTING PROBLEM. REPLACED CSAS COMPUTER AND CSAS ACTUATOR PROBLEM WAS GONE FOR ABOUT 12 FLIGHT HOURS. PROBLEM RETURNED. THIS TIME WE FOUND THE SLIDING SLEEVE TO BE BINDING ON THE TAIL ROTOR SHAFT WHEN RADIAL FORCE WAS APPLIED TO THE SLIDING SLEEVE.

Part: BRUSHES — ARCED (STARTER GEN) · airframe 3,141 hrs

STARTER GENERATOR BRUSHES STARTED ARCING AFTER ONLY 119.6 HOURS OF USE. . REPLACED WITH SERVICEABLE UNIT.

Part: INDICATOR — MALFUNCTIONED (TRIPLE TACH) · airframe 3,009 hrs

REQUEST WARRANTY REPAIR. NR 1 N2 NEEDLE READS 2 PERCENT WHEN POWERED UP. NR 1 N2 NEEDLES READS 100 PERCENT, NR 2 N2 NEEDLES READS 99 PERCENT, AND NR READS 98 PERCENT AT FULL "FLY" RPM. PART ONLY LASTED 29.5 HOURS FROM THE LAST REPAIR. UNIT SENT OUT TO AEC FOR WARRANTY REPAIR UNDER RO:9-090002-19 W/O AN MMIR. JUAN CALLED 9/8/2003 AND ASKED FOR AN MMIR TO BE FILLED OUT. THIS WAS FILLED OUT AND FAXED 9/9/2003.

Part: STARTER GEN — FAILED (ENGINE) · airframe 2,998 hrs

STARTER GENERATOR FAILED. WOULD NOT TEST. REPLACED WITH SERVICEABLE UNIT. 9/4/03

Part: ACTUATOR — MALFUNCTIONED (TAIL ROTOR) · airframe 2,811 hrs

CAUSING SEVERE KICKING EVEN WITH YAW-CSAS DISENGAGED. SEALS LEAKING. REPLACED WITH SERVICEABLE UNIT.

Part: GYRO — INOPERATIVE (ATTITUDE) · airframe 2,751 hrs

SKEWED 8 DEGREES TO THE LT WHEN SPOOLED UP. REPLACED WITH SERVICEABLE UNIT.

Part: INDICATOR — FLUCTUATES (TRIPLE TACH) · airframe 2,701 hrs

TRIPLE TACH NR NEEDLE INTERMITTENTLY FLUCTUATES 20-30 PERCENT. REPLACED WITH SERVICEABLE UNIT.