N548GA

Part: FITTING — CRACKED (RT NACELLE) · airframe 35,598 hrs · 44,213 cycles

DURING MAINTENANCE A CRACK WAS IDENTIFIED ON THE OUTBOARD LEG OF THE RIGHT HAND INBOARD NACELLE FITTING, (P/N: 5292029-22) THIS CRACK MEASURES APPROXIMATELY .250 INCHES LONG AND WAS DISCOVERED USING THE LIGHTED BORESCOPE INSPECTION PROCEDURE AS OUTLINED IN TEXTRON MEL-54-02R2 TO SATISFY AD2017-10-09. THIS CRACK IS CONSISTENT WITH OTHERS THAT HAVE BEEN IDENTIFIED USING THE SAME INSPECTION PROCEDURE. THIS FITTING WILL BE REPLACED USING NEW PARTS.

Part: FITTING — CRACKED (ZONE 400) · airframe 35,472 hrs · 43,959 cycles

WHILE PERFORMING THE LIGHTED BORESCOPE PROCEDURE AS OUTLINED IN TEXTRON MEL-54-02 R2 TO SATISFY AS2017-10-19, A CRACK WAS IDENTIFIED ON THE OUTBOARD SIDE OF THE RIGHT HAND OUTBOARD NACELLE FITTING. THIS CRACK MEASURES .0799 IN LENGTH AND ITS LOCATION IS CONSISTENT WITH OTHERS FOUND USING THE SAME METHOD. THIS FITTING WILL BE REPLACED WITH A FACTORY NEW PART.

Part: RIB — CRACKED (RT WING) · airframe 33,288 hrs · 41,130 cycles

DURING MAINTENANCE A CRACK WAS DISCOVERED ON THE LEFT HAND CLOSEOUT RIB (P/N: 5122115-55) AT L.W.S. 106.79. THIS CRACK ORIGINATES FROM A HOLE IN THE FORWARD ROW OF FASTENERS COMMON TO THE AFT MAIN LANDING GEAR TRUNNION SUPPORT PLATE AND TRAVELS FORWARD AN APPROXIMATE LENGTH OF .750 INCHES. THIS RIB WILL BE REPLACED USING NEW PARTS.

Part: CROSSBEAM — CRACKED · airframe 31,412 hrs · 38,347 cycles

DURING MAINTENANCE A CRACK WAS DISCOVERED ON THE LEFT HAND CROSSOVER BEAM (P/N: 5654104-11). THIS CRACK IS IN THE AREA OF THE EXHAUST MOUNT FOR THE INBOARD EXHAUST ELBOW (APPROXIMATELY LEFT WING STATION: 87.44) THE CRACK MEASURES APPROXIMATELY 1.964 INCHES IN LENGTH. THIS BEAM WILL BE REMOVED AND REPLACED USING NEW PARTS.

Part: BEAM — CRACKED (RT ENGINE BAY) · airframe 29,876 hrs · 36,315 cycles

WHILE PREFORMING OTHER MAINTENANCE, A CRACK WAS DISCOVERED IN THE AFT OUTBOARD SIDE OF THE RT INBOARD ENGINE BEAM. THE FASTENER HOLE WAS OUT OF TOLERANCE FOR THE PRESCRIBED FASTENER. THE BEAM WAS REPLACED.

Part: FITTING — CRACKED (NACELLE) · airframe 29,876 hrs · 36,315 cycles

WHILE CONDUCTING SID 57-10-16 INSPECTION, TWO CRACKS WERE DISCOVERED ON THE OUTBOARD SIDE OF THE INBOARD FITTING, JUST FORWARD OF THE SPAR STRAP. THE FITTING WAS REPLACED.

Part: EXHAUST VALVE — DAMAGED (NR 5 CYLINDER) · airframe 29,736 hrs · 36,107 cycles

CREW REPORTED 'INTERMITTENT ENGINE MISFIRE IN FLIGHT. NO PRECAUTIONARY ACTIONS WERE TAKEN BY THE CREW AND THE ACFT LANDED SAFELY AT ITS INTENDED DESTINATION WITH NO ISSUES. INSPECTION DISCOVERED LOW DIFFERENTIAL COMPRESSION CHECK RESULT AT CYLINDER NR 5 FOR THE LT ENGINE. A BORESCOPE INSPECTION WAS PERFORMED. THE VALVE DOES NOT APPEAR TO EXHIBIT THE COMMON GREEN COLOR INDICATING HEAT DAMAGE BUT THE EXHAUST VALVE EDGES WERE NOTED AS WAVY. ASSUME THIS MAY BE A CUMULATIVE EROSION EFFECT FROM EXHAUST GAS BLOW BY. DIFFERENTIAL COMPRESSION CHECK AND BORESCOPE INSPECTION PERFORMED IAW LATEST REVISION OF CMI M-O MANUAL. ON REMOVAL OF THE ROCKER BOX COVER, THE EXHAUST VALVE ROTOCOIL WAS FOUND TO BE SEVERELY DAMAGED.

Part: FITTING — CRACKED (LT NACELLE) · airframe 29,456 hrs · 35,685 cycles

DURING A SID 57-10-16 INSPECTION, A CRACK WAS DISCOVERED IN THE LT OUTBOARD NACELLE FITTING. THE CRACK WAS FOUND ON THE INBOARD SIDE, JUST FORWARD OF THE SPAR STRAP. THE CRACK MEASURED .145 IN LENGTH.

Part: PUMP — LEAKING (HEATER FUEL) · airframe 29,231 hrs · 35,409 cycles

THE PILOT REPORTED HEATER FAILED IN FLIGHT, MAY WORK ON THE GROUND. ADDITIONALLY INDICATED AN ODOR OF GAS ON CLIMB OUT. MAINTENANCE INSPECTED THE HEATER AND FOUND THE HEATER FUEL PUMP LEAKING. REMOVED AND REPLACED THE HEATER FUEL PUMP. AFTER CONDUCTING AN OPS CHECK, NO FURTHER LEAKS NOR ODORS WERE PRESENT.

Part: PUMP — DEFECTIVE (HEATER) · airframe 28,074 hrs · 33,461 cycles

PILOT REPORTED FUEL SMELL WITH HEATER RUNNING IN FLIGHT. R & R THE HEATER FUEL PUMP & HEATER FUEL LINE. OPERATIONAL CHECKED GOOD.

Part: UNKNOWN — ODOR (CABIN) · airframe 28,049 hrs · 33,430 cycles

PILOT REPORTED STRONG FUEL SMELL IN CABIN WITH HEATER ON. INSPECTED HEATER FUEL LINES WITH NO LEAKS NOTED. AS PRECAUTION, CLEANED HEATER SPARK PLUG & FUEL NOZZLE. OPERATIONALLY CHECKED GOOD.

Part: DRAG BRACE — CRACKED (NLG) · airframe 23,970 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 BEYOND LIMIT ALLOWABLE OF MEB91-11R1. THIS UNIT HAS BEEN SCRAPPED & A REPLACEMENT DRAG BRACE HAS BEEN INSTALLED IN ACFT.

Part: DRAG BRACE — CRACKED (NLG) · airframe 21,736 hrs

AT SCHEDULED INSPECTION, NLG DRAG BRACE, OEM 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. THIS UNIT HAS BEEN REPAIRED IAW PROCEDURE OUTLINED IN MEB941-11R1 & RETURNED TO SERVICE.

Part: UPLOCK HOOK — WORN (MLG) · airframe 21,566 hrs

CREW REPORTED, AFTER TAKEOFF, UPON GEAR RETRACTION, GREEN DOWNLOCK LIGHTS EXTINGUISHED, HYD PRESSURE LIGHT REMAINED ILLUMINATED ALONG WITH RED GEAR UNSAFE LIGHT. LANDING GEAR CONTINUED TO CYCLE IN AND OUT OF THE WHEEL WELLS. AFTER LEVELING AT 1000 FT, EMERGENCY WAS DECLARED. GEAR SELECTED DOWN, CONFIRMED 3 GREEN DOWN AND LOCKED LIGHTS WERE ILLUMINATED, RETURNED TO BLOCK WHERE THE LANDING WAS UNEVENTFUL. MX INSPECTED ACFT, PERFORM GEAR RETRACTION TEST, FOUND RT UP LOCK WORN. R & R BOTH MAIN GEAR UPLOCK HOOKS AS A PRECAUTIONARY MEASURE. EXTENTION AND RETRACTION TEST CHECK GOOD. ACFT RELEASED BACK TO SERVICE.

Part: LIMIT SWITCH — SHORTED (CABIN HEATER) · airframe 21,500 hrs

CREW REPORTED, WHILE IN CRUISE, SMOKE APPEARED IN THE CABIN, ALONG WITH A ELECTRICAL ODOR. EMERGENCY WAS DECLARED, AFTER WHICH ALL ELECTRICAL EQUIPMENT WAS TURNED OFF. FUEL SUPPLY TO HEATER WAS ALSO SHUT OFF. AFTER SEVERAL MINUTES, THE SMOKE AND ODOR DISSIPATED, AT WHICH TIME THE NR 2 RADIO WAS TURNED BACK ON TO GET CLEARANCE FOR LANDING. SMOKE AND ELECTRICAL ODOR DID NOT RETURN. LANDING WAS UNEVENTFUL. MX INSPECTED THE ACFT, TO INCLUDE THE HEATING SYS. MX FOUND THE CABIN HEATER TEMP DUCT LIMIT SWITCH HAD FAILED (SHORTED). MX R & R THE DUCT LIMIT SWITCH, SYS CHECKED NORMAL. ACFT RETURNED TO SERVICE.

Part: ENGINE — UNSERVICEABLE (LEFT) · airframe 19,854 hrs

CREW REPORTED LT ENGINE POWER LOSS ENROUTE. ENGINE WAS SECURED AND PROPELLER FEATHERED. CREW ELECTED TO DIVERT TO HYA WHERE AN EMERGENCY WAS DECLARED. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND 3 INCH DIAMETER HOLE IN RIGHT CRANKCASE HALF. MAINTENANCE REMOVED AND REPLACED THE LEFT ENGINE. MAINTENACE ALSO REMOVED AND REPLACED THE LEFT PROPELLER AS A PRECAUTIONARY MEASURE FOR POSSIBLE OIL CONTAMINATION.

Part: UPLOCK SWITCH — INOPERATIVE (NLG)

AIRCRAFT HAD THE HYDRAULIC LIGHT REMAIN ILLUMINATED AFTER GEAR RETRACTION. MAINTENANCE WAS UNABLE TO DUPLICATE, THE LT DOWNLOCK SWITCH WAS RESEALED AND LUBRICATED, FLIGHT CHECK UNSATISFACTORY, STILL UNABLE TO DUPLICATE ON GROUND, REPLACED NOSE UPLOCK SWITCH AND ADJUSTED LT UPLOCK SWITCH AND FLIGHT CHECKED GOOD.

Part: PIN — SHEARED (OIL PUMP DRIVE)

TACHOMETER INOPERATIVE, RT DRIVE GEAR DOWEL PIN BROKE ON OIL PUMP GEAR. REMOVED OIL PUMP HOUSING COVER, REPLACED DRIVE PIN AND REINSTALLED COVER.

Part: MASTER SWITCH — FAILED (INST PANEL)

ON PREFLIGHT INSPECTION, AVIONICS MASTER SWITCH FAILED. MAINTENANCE REPLACED SWITCH AND RETURNED AIRCRAFT TO SERVICE.

Part: PIN — BROKEN (LATCH UP CABN DR)

DURING FLIGHT, UPPER CABIN DOOR OPENED. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND FORWARD LATCH PIN BROKEN AT BELLCRANK ATTACH POINT. REPLACED LATCH PIN AND ASSIST SPRINGS AND RELEASED THE AIRCRAFT BACK TO SERVICE. (X)

Part: BEARING — DESTROYED (INSIDE GOVERNOR)

PILOT REPORTED LOSS OF POWER ON TAKEOFF. MAINTENANCE FOUND PROPELLER GOVERNOR LEAKING OIL AND CONFIRMED POWER LOSS. CHANGED GOVERNOR AND RETURNED AIRCRAFT TO SERVICE. TEAR DOWN OF GOVERNOR REVEALED INTERNAL FAILURE CAUSED BY BEARING FAILURE. (X)