N59826
Registered owner: AIR ARCTIC INC, AK (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| WARBELOWS AIR VENTURES INC (WVBA) | Certificate holder | — | Matched by certificate designator |
| WARBELOWS AIR VENTURES INC (WVBA) | Operator | 2025-01-10 – 2025-01-10 | Operator named in NTSB report |
Accident & incident history
Maintenance disclosures
PILOT REPORTED, "RT OUTBOARD FUEL GAUGE READS FULL CLOCKWISE - ALL THE TIME." FUEL QUANTITY SYSTEM WAS DEFERRED PER MEL 28-4 "FUEL QUANTITY INDICATORS" ON DMR #5111 CATEGORY "C" WITH A DURATION OF 10 DAYS. THE AIRCRAFT WAS BROUGHT IN FOR MAINTENANCE ON 27 DECEMBER 2018 AFTER FLYING 2.5 HOURS SINCE DEFERRAL. DURING TROUBLESHOOTING THE RIGHT INBOARD AUX FUEL SENDER WAS FOUND TO BE DEFECTIVE AND SHOWED AN INDICATION THAT ABNORMALLY HIGH HEAT HAD BEEN GENERATED DURING THE TIME OF THE SENDER'S FAILURE. THERE WAS EVIDENCE OF HEAT DISCOLORATION AND POSSIBLE SMOKE STAINS ON THE SENDER'S WIPER CASE AND SUPPORT BRACKET. DISASSEMBLY OF THE WIPER CASE REVEALED THAT THE WIPER WAS DEFORMED DUE TO HIGH HEAT AND THE POTENTIOMETER STRIP WAS DAMAGED BY WHAT APPEARS TO BE ELECTRICAL ARCING. THERE WAS EVIDENCE OF MELTED PLASTIC AND SMOKE RESIDUE INSIDE AND OUTSIDE THE WIPER CASE. THERE WAS NO DAMAGE INFLICTED IN THE FUEL CELL OR THE WIRING TO/FROM THE FUEL QUANTITY SENDER.
DURING FLIGHT AJ100, APPROXIMATELY 10 MILES FROM DESTINATION, THE LEFT ENGINE SHUTTERED BRIEFLY AND ENGINE OIL WAS OBSERVED STREAMING FROM THE COWLING. THE PILOT FEATHERED THE LEFT PROPELLER AND IMMEDIATELY SHUTDOWN THE ENGINE. THE FLIGHT CONTINUED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE PERSONNEL DISCOVERED THAT THE NR 6 CYLINDER HAD SEPARATED FROM THE ENGINE, THE CAM SHAFT HAD SHATTERED INTO SEVERAL PIECES, A GROOVE WAS GOUGED BY THE CYLINDER'S PISTON CONNECTING ROD INTO THE CASE HALF NR 6 CYLINDER OPENING, AND A LARGE PORTION OF THE CASE HALF HAD BEEN BROKEN OUT AROUND THE SHEARED CYLINDER'S ATTACH BOLTS. THIS ENGINE WILL BE SENT TO THE MANUFACTURER FOR A TEAR-DOWN ANALYSIS AND WE WILL ATTACH, THEIR FINDINGS TO THIS REPORT AS RECEIVED.
RT. ENGINE, OIL TEMP REDLINE (HIGH), OIL PRESSURE LOW (REDLINE). ATTEMPTED TO SLOW ACFT AND UNCONGEAL OIL COOLER. THIS DID NOT HELP. PERFORMED PRECAUTIONARY SHUTDOWN. ON LANDING, MX INSPECTED FOR POSSIBLE OIL COOLER CONGEALING, DUE TO THE EXTREME OAT (-21°F). ENGINE OIL LEVEL WAS CHECKED AND WAS FOUND TO BE IN ACCEPTABLE RANGE. THE OIL FILTER WAS OPENED AND INSPECTED FOR CONTAMINATION, AND THE OIL STRAINER WAS INSPECTED - BOTH WITH NO DISCREPANCIES FOUND. AS A PRECAUTIONARY MEASURE, THE ENGINE VERNATHERM, VALVE ASSY TEMP CONTROL, OIL COOLER BYPASS, WAS REPLACED WITH NEW. AN ENGINE RUNUP FOR LEAK/OPS CHECK WAS PERFORMED WITH NO DISCREPANCIES FOUND.
PILOT REPORTED VENT FAN FAILED IN FLIGHT. SMELLED SMOKE DURING CLIMB AFTER DEPARTURE. PILOT RETURNED TO DEPARTURE. BOTH VENT FANS WERE REMOVED, NEITHER SHOWING EVIDENCE OF MALFUNCTION. BOTH WERE OPERATED ON BATTERY POWER WHILE REMOVED FROM ACFT WITHOUT ANY SIGN OF OVERHEATING OR SMOKE. BOTH VENT FANS WERE REPLACED AS A PRECAUTION. NO SIGNS OF SMOKEâS SOURCE WAS FOUND AFTER DETAILED INVESTIGATION OF WIRING AND COMPONENTS BEHIND INSTRUMENT PANEL. CHECKED THE AVIONICS COOLING FAN AND FLAP MOTOR FOR OVERHEATING AND AS POSSIBLE SMOKE SOURCES, NOTHING ABNORMAL FOUND. AFTER COMPLETION OF AAIP EVENT NR 3, ACFT WILL BE SENT ON CHECK FLIGHT TO ENSURE INTEGRITY OF VENT FANS AND ELECTRICAL WIRING.
ENROUTE, PILOT BEGAN TO DETECT SMOKE. RETURNED TO DEPARTURE. DURING RETURN, PILOT SHUTDOWN ELECTRICAL SYS & LANDED WITHOUT INCIDENT. AFTER ELECTRICAL SYS WAS SHUTDOWN, PILOT NOTICED A DECREASE IN THE ODOR OF SMOKE. MX DISCOVERED THE LEFT INTERIOR VENT FAN HAD SEIZED BEARINGS. SEIZED BEARINGS CAUSED THE MOTOR'S WINDINGS TO HEAT UP. MX FOUND NO EXTERNAL CHARRING OR DISCOLORATION TO THE MOTOR OR ANY ADJACENT EQUIPMENT OR STRUCTURE. NO SMOKE DAMAGE TO THE INTERIOR OF ACFT, AND THERE WAS NO EXTERNAL WIRING DAMAGE. VENT FAN ASSY WAS REPLACED AND ACFT RETURNED TO SERVICE.
COMPLETE ELECTRICAL SYSTEM FAILURE. PILOT REPORTED: AFTER TAKEOFF AT CXF LT ALTERNATOR LIGHT CAME ON, 15 MINUTES LATER RT ALTERNATOR LIGHT CAME ON. INSPECTION REVEALED A DEAD BATTERY, A BROKEN FIELD WIRE ON THE LEFT ALTERNATOR AND A RIGHT ALTERNATOR BELT IN NEED OF REPLACEMENT. LEFT ALTERNATOR FIELD WIRE WAS REPAIRED, RIGHT ALTERNATOR BELT WAS REPLACED, BATTERY WAS SERVICED. ALL OPERATION CHECKS SATISFACTORY.
PILOT REPORTS A DROP IN MANIFOLD PRESSURE AFTER TAKEOFF TO 18 INCHES AND THE LEFT ENGINE WAS FEATHERED. UPON INSPECTION, THE TURBOCHARGER SHAFT, BEARING/HOUSING HAD FAILED. NO OIL RESTRICTION IN THE SUPPLY HOSE WAS FOUND.