N120PC

Part: FITTING — CORRODED (RT NACELLE) · airframe 33,725 hrs · 34,943 cycles

WHILE PERFORMING LIGHTED BOROSCOPE INSPECTION PROCEDURE AS OUTLINED IN TEXTRON MEL-54-02R2 TO SATISFY AD2017-10-09, A SPOT OF CORROSION WAS IDENTIFIED ON THE RIGHT HAND OUTBOARD NACELLE FITTING (P/N: 5292029-24). THIS CORROSION IS LOCATED ON THE BOTTOM OF THE UPPER FACE OF THE FITTING NEAR ONE OF THE AFT FASTENERS, AND MEASURES APPROXIMATELY, .391 INCHES LONG AND, .527 INCHES WIDE. NO OTHER DEFECTS WERE NOTED WITH THE FITTING. THIS FITTING WILL BE REPLACED USING SUPERSEDED P/N: 5292029-32.

Part: CYLINDER — LOW PRESSURE (ENGINE) · airframe 33,725 hrs · 34,943 cycles

PILOT REPORTED ROUGH RUNNING ENGINE. MAINTENANCE INSPECTED AND FOUND RIGHT #5 CYLINDER NO COMPRESSION. REMOVED AND REPLACED ENGINE WITH NO FURTHER DEFECT NOTED, AS WAS SCHEDULED FOR REMOVAL WITHIN 87 HOURS.

Part: FITTING — CORRODED (LT WING) · airframe 33,328 hrs · 34,215 cycles

DURING MAINTENANCE, TWO AREAS OF CORROSION WERE DISCOVERED ON THE HORIZONTAL FLANGE OF THE UPPER LEFT HAND AFT WING FITTING (P/N 0822550-45.) THESE AREAS OF CORROSION MEASURED .750 BY .250 WITH A DEPTH OF .042, AND .400 BY .250 WITH A DEPTH OF .031. THIS FITTING WILL BE REMOVED AND REPLACED WITH A FACTORY NEW PART.

Part: SPAR CAP — CORRODED (LT WING) · airframe 33,328 hrs · 34,215 cycles

DURING MAINTENANCE CORROSION WAS DISCOVERED ON THE LEFT HAND LOWER AFT SPAR CAP P/N: 5122041-23. THIS CORROSION IS LOCATED IN THE FORWARD RADIUS OF THE HORIZONTAL AND VERTICAL LEGS OF THE CAP AT APPROXIMATE LWS 228.71. THIS CORROSION HAS A DEPTH OF APPROXIMATELY .029 INCHES DEEP WHICH IS IN EXCESS OF THE MAXIMUM REMOVABLE LIMITS ALLOWED UNDER MEB95-11R1 SECTION 3. THIS CAP WILL BE REMOVED AND REPLACED USING NEW PARTS.

Part: SPAR CAP — CORRODED (LT WING) · airframe 33,328 hrs · 34,125 cycles

DURING MAINTENANCE AN AREA OF CORROSION WAS IDENTIFIED ON THE HORIZONTAL LEG OF THE LEFT HAND UPPER OUTBOARD SPAR CAP (P/N: 5122041-21). THIS CORROSION IS LOCATED AT APPROXIMATE LEFT WING STATION 197.71 AND MEASURES APPROXIMATELY .022 INCHES DEEP. THIS IS IN EXCESS OF THE MAXIMUM REMOVABLE LIMITS ALLOWED UNDER MEB95-11R1 SECTION 3. THIS CAP WILL BE REMOVED AND REPLACED USING NEW PARTS.

Part: EXHAUST VALVE — DAMAGED (NR 2 CYLINDER) · airframe 31,585 hrs

CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION; EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.

Part: EXHAUST VALVE — DAMAGED (NR 5 CYLINDER) · airframe 31,414 hrs

CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION; EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.

Part: SELECTOR — OUT OF RIG (FUEL SYSTEM) · airframe 31,274 hrs · 30,024 cycles

LEFT ENG FUEL FLOW WENT TO 0 IN FLIGHT. FOUND FUEL SELECTOR OUT OF RIG & RIGGED & RELEASED ACFT FOR FLIGHT CHECK. INSPECTED FUEL BOWL AS PRECAUTION.

Part: FAN — MALFUNCTIONED (CABIN) · airframe 30,645 hrs · 28,754 cycles

THE LT ANNUNCIATOR INTERMITTENT & AN ELEC SMELL IN CABIN. INSPECTED, R & R LT ALTERNATOR OUT SENSOR IAW MM CH 34-30-0. OPERATIONS CHECKED GOOD. THE SMELL WAS DETERMINED TO BE THE CABIN VENT FAN WHICH WAS PLACED ON MEL. NO FURTHER DEFECTS NOTED.

Part: SIGHT TUBE — SPLIT (HYDRAULIC SYS) · airframe 30,123 hrs

PILOT REPORTED AFTER DEPARTURE FROM MAZ & DURING TRANSITION FROM CLIMB TO CRUISE SMOKE & FUMES WERE DETECTED COMING FROM DEFROST VENT. PILOT CLOSED DEFROST, RAM AIR & CABIN AIR VENT VLVS. UPON CLOSING CABIN VENTILATION VLVS, PILOT REPORTS SMOKE & FUMES NO LONGER ENTERING CABIN. PILOT RETURNED TO MAZ AS A PRECAUTION. COMPANY MX INSPECTED ACFT & FOUND HYD RESERVOIR SIGHT TUBE SPLIT & ALLOWING HYD FLUID TO ATOMIZE WHILE UNDER PRESS. COMPANY MX REPLACED HYD RESERVOIR SIGHT TUBE, SERVICED HYD RESERVOIR & PERFORMED OPERATIONAL & LEAK CHECKS PRIOR TO RELEASE.

Part: SPAR — CORRODED (ZONE 600) · airframe 28,661 hrs

DURING A REGULARLY SCHEDULED MX, DAMAGE WAS DISCOVERED TO THE RT SPAR STRAP. DAMAGE WAS A MISDRILL AND INTERGRANULAR CORROSION. BASED ON THE DAMAGE NOTED, REMOVED DAMAGED PART AND INSTALLED NEW PART.

Part: SPAR — CRACKED (ZONE 100) · airframe 28,661 hrs

DURING REGULARLY SCHEDULED MX INSPECTION, DAMAGE WAS NOTED TO THE AFT CARRY THROUGH SPAR ASSY UPPER FORWARD AND AFT WEB FLANGES. FLANGES WERE FOUND TO BE CRACKED AT FLOOR SUPPORT MOUNT LOCATIONS. OPEN

Part: SPAR — DAMAGED (RIGHT) · airframe 28,661 hrs

DURING A SCHEDULED MX EVENT, IT WAS NOTED THAT THE RT SPAR STRAP HAD PREVIOUSLY SUSTAINED DAMAGE. UPON NOTING THIS DISCREPANCY, A WO WAS SUBMITTED TO MRO FOR REMOVAL AND REPLACEMENT OF THE RT SPAR STRAP. THE ACFT IS GROUNDED AWAITING THE REQUIRED REPAIRS.

Part: INDICATION SYS — INACCURATE (FUEL QTY) · airframe 28,507 hrs

DURING CRUISE, LEFT ENGINE STARTED TO LOOSE POWER. PILOT NOTICED LT FUEL FLOW LOWER THAN 70 LBS MIN AND DECREASING. PILOT SWITCHED THE LT AUX FUEL PUMP TO HIGH AND ENGINE RAN NORMAL. AFTER 30 SECONDS, THE FUEL FLOW STARTED TO DECREASE AGAIN. THE ENGINE BECAME INOPERABLE AND WAS UNABLE TO START. PILOT PERFORMED "ENGINE FAILURE DURING FLIGHT" AND "ENGINE INOPERATIVE LANDING" CHECKLIST AND LANDED WITH OUT A PROBLEM. ACFT WAS INSPECTED AND FOUND THE LT FUEL QUANTITY INACCURATE. SYS WAS PLACARDED AND SYS WAS MEL"D. MX LATER REPLACED THE LT FUEL QUANTITY GAUGE, SIGNAL CONDITIONER, FUEL PROBES, AND HARNESS. SYS WAS THE CALIBRATED.

Part: DRAG BRACE — CRACKED (NLG) · airframe 27,716 hrs

AT SCHEDULED INSPECTION, NLG DRAG BRACE, PN 5142002-5, WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE WITHIN ALLOWABLE LIMIT OF MEB91-11R1. THIS UNIT HAS BEEN REPAIRED IAW PROCEDURE OUTLINED IN MEB941-11R1 & RETURNED TO SERVICE.

Part: DIMMER — FAILED (COCKPIT LIGHTS) · airframe 26,618 hrs

CREW REPORTED BURNING ELECTRICAL ODOR FLOWED THROUGH COCKPIT. ALL NON-ESSENTIAL EQUIPMENT WAS TURNED OFF. SHORTLY AFTER, A SMALL STREAM OFF SMOKE AROSE FROM AREA JUST FWD OF THROTTLE LEVERS. IFR CLEARANCE CANCELLED, DIVERTED, AFTER COMPLYING WITH SMOKE IN THE COCKPIT CHECKLIST. LANDED WITHOUT INCIDENT. MX INSPECTED ACFT AND FOUND COCKPIT LIGHTING CONTROL DIMMER ASSY DAY/NIGHT SWITCH BURNED. R & R DIMMER ASSY, RELEASED ACFT BACK TO SERVICE.

Part: CIRCUIT BREAKER — UNSERVICEABLE (AVIONICS) · airframe 26,487 hrs

CREW REPORTED AVIONICS MASTER SWITCH TRIPPED ONCE DURING FLIGHT. MX REMOVED AND REPLACED CIRCUIT BREAKER SWITCH. SYS CHECKS OK. ACFT RELEASED BACK TO SERVICE.

Part: MASTER SWITCH — DEFECTIVE (L/H C/B PANEL)

CREW REPORTED AVIONICS MASTER SWITCH INOP. MX CHANGED CIRCUIT BREAKER SWITCH.

Part: DISTRIBUTOR GEAR — FAILED (LT MAGNETO)

ON CLIMB OUT, PILOT REPORTED RIGHT ENGINE RUNNING ROUGH, RETURNED W/O INCIDENT. MECHANIC FOUND RT ENGINE/ LEFT MAGNETO DIST GEAR FAILED. REMOVED AND REPLACED MAGNETO AND RETURNED A/C TO SERVICE.

Part: DRAG BRACE — CRACKED (NLG)

DURING SCHEDULED INSPECTION, MECHANIC FOUND NOSE GEAR DRAG BRACE CRACKED AT ACTUATOR ATTACH LUG. REMOVED AND REPLACED DRAG BRACE AND RETURNED AIRCRAFT TO SERVICE.

Part: SWITCH — BURNED (AVION MASTER)

DURING CRUISE FLIGHT, CABIN STARTED FILLING WITH SMOKE. SMOKE WAS ORIGINATING FROM AVIONICS MASTER SWITCH - UNABLE TO TURN SWITCH OFF, SO CIRCUIT BREAKERS WERE PULLED. SMOKE EVACUATION PROCEDURES WERE INITIATED AND SMOKE SUBSIDED. A NORMAL LANDING WAS MADE. PROBLEM CONFIRMED TO BE THE AVIONICS MASTER SWITCH. SWITCH REPLACED WITH NEW. AIRCRAFT RETURNED TO SERVICE.