N1547N

Part: PICKUP — FAILED (N2 DUAL COIL RPM) · airframe 20,107 hrs

DURING CRUISE FLIGHT, N2 INDICATOR WENT FROM 100 PERCENT TO ZERO. REMOVED AND REPLACED N2 PICKUP, NR 2 ENGINE WITH SERVICEABLE UNIT IAW MM. GROUND RUN AND OPS CHECK GOOD. (K)

Part: ENGINE — MAKING METAL (NR 1)

AFTER TAKEOFF, NR 1 ENGINE CHIP LIGHT ILLUMINATED, PILOT RETURNED TO RIG. THE MECHANIC REMOVED, CLEANED, AND INSPECTED NR ENGINE CHIP PLUGS. SMALL HAIR LIKE SILVER WAS DISCOVERED. UPON CLEANING THE CHIP PLUGS, COMPLIED WITH GROUND RUN AND LEAK CHECK, NO DISCREPANCY WAS NOTED, AC RETURNED TO SERVICE.

Part: ENGINE — OVERTEMP (NR 1)

IN STRAIGHT AND LEVEL FLIGHT, NR 1 ENGINE OIL TEMPERATURE BEGAN TO CLIMB. AS IT APPROACHED, THE RED LINE WE BEGAN TO MONITOR CLOSELY. WHEN IT WENT ABOVE THE RED LINE, I FOLLOWED CKLIST PROCEDURES AND SHUT DOWN NR 1 ENGINE, MADE RUN ON LANDING. NO OTHER INDICATIONS OF PROBLEMS. MAINT REMOVED AND REPLACED NR 1 ENGINE FOR HIGH OIL TEMPERATURE. ALSO CHANGE THE OIL COOLER AND ITS THERMOSTAT. COMPLIED WITH OPS CHECK BOTH GROUND AND FLIGHT BOTH CHECKED GOOD. AIRCRAFT RELEASED FOR SERVICE.

Part: SWITCH — FAILED (LT HYD SERVO)

DURING CRUISE FLIGHT, NR 2 SERVO SYSTEM CAUTION LIGHT ILLUMINATED, AIRCRAFT WAS DIVERTED TO INTRACOASTAL, PILOT FOLLOWED EMERGENCY CHECKLIST AND LANDED AT INTRACOASTAL. UPON LANDING, THE MECHANIC REMOVED AND REPLACED REARWARD PRESSURE SWITCH ON LEFT FORWARD SERVO. AIRCRAFT WAS FUNCTION CHECKED AND RETURNED TO SERVICE.

Part: ENGINE — MAKING METAL (NR 2)

DURING RUN UP NR 2 ENGINE CHIP LIGHT ILLUMINATED. METAL SAW FOUND IN OIL SYSTEM CHIP PLUGS. ENGINE WAS REMOVED AND REPLACE.

Part: BEARING — FAILED (ENGINE)

ENGINE MAKING METAL. BEARING FAILED. (M)

Part: SKIN — CRACKED (FUSELAGE)

CRACK DISCOVERED ON SERVICE CHECK INSPECTION OF AIRCRAFT. DISCOVERED CRACK ON RT SIDE OF ROOF AT AREA OF HYDRAULIC ACCESS DOOR. REMOVED PASSENGER OVEHREAD TRIM AND FOUND BEAM AND CAP ANGLE CRACKED UNDERNEATH ROOF SKIN CRACK.

Part: BLADE — CRACKED (M/R)

DURING 500 HOUR INSPECTION FOUND BLADE LEADING EDGE CRACKED AND SEPARATED AT RIGHT STATION 114 AND RIGHT STATION 154, LEADING EDGE LOWER SURFACE DEBONDED AT RIGHT STANDARD 100, TRAILING EDGED CRACKED AT RIGHT STATION 62.

Part: PADDLE — DEBONDED (T/R)

DISCOVERED DURING 500 HOUR INSPECTION, T/R PADDLE 'A' TIP CAP DEBONDED. PADDLE 'B' PIVOT BEARING RETAINERS DEBONDED.

Part: BLADE — DEBONDED (M/R)

DURING 500 HOUR INSPECTION FOUND BLADE LEADING EDGE CRACKED AND DEBONDED AT RIGHT STA 114, AND STA 154.

Part: RIB — CORRODED (VERTICAL PYLON)

MAJOR INSPECTION FOUND VERTICAL STABILIZER RIB WITH INTERGRANULAR CORROSION. RIB WAS REPLACED.

Part: SPAR WEB — CORRODED (VERTICAL STAB)

MAJOR INSPECTION FOUND VERTICAL STABILIZER SPAR WEB DOUBLER WITH INTERGRANULAR CORROSION. DOUBLER WAS REPLACED.

Part: BULKHEAD — CORRODED (VERTICAL PYLON)

MAJOR INSPECTION FOUND FORWARD CANTED BULKHEAD WITH INTERGRANULAR CORROSION. BULKHEAD WAS REPLACED.

Part: SUPORT — CORRODED (VERTICAL STAB)

MAJOR INSPECTION FOUND VERTICAL STABILIZER SUPPORT, AFT LOWER, CORRODED. SUPPORT WAS REPLACED.

Part: MOUNT — HOLES WORN (FWD LT ENG COMP)

DURING SCHEDULED INSPECTION FOUND ATTACHMENT HOLES IN OUTSIDE LT FWD TRIPOD SUPPORT TUBES WORN BEYOND LIMITS.

Part: MOUNT — HOLES WORN (FWD RT ENG COMP)

DURING SCHEDULED INSPECTION, FOUND THE ATTACHMENT HOLE IN OUTSIDE RT FWD TRIPOD SUPPORT TUBES WORN BEYOND LIMITS.

Part: TIP RIB — SEPARATED (M/R BLADE)

MAIN ROTOR BLADE TIP RIB WAS FOUND SEPARATED. IT WAS DISCOVERED DURING THE 500-HOUR INSPECTION. TIP RIB AND DOUBLER SEPARATED. SUBMITTER STATED POSSIBLY CAUSED BY EXCESS PRESSURE APPLIED TO TIP CAP SCREWS DURING TIP CAP INSTALLATION. COMPONENT NR 7615009100051A.

Part: BLADE — DEBONDED (M/R)

DURING 500-HOUR INSPECTION, FOUND BLADE SKIN DEBONDED. LOWER SURFACE OVER SPAR AT BLADE TIP.