N257MC
Registered owner: BIGHORN AIRWAYS INC, WY (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| Bighorn Airways, Inc. (BIGA) | Certificate holder | — | Matched by certificate designator |
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
2 reports on file, 2015-04-06 – 2020-06-03.
Part: RESTRICTOR VALVE — LEAKING (NLG) · airframe 14,956 hrs · 20,366 cycles
THE RESTRICTOR VALVE ASSEMBLY (ATTACHED TO THE SHUTTLE VALVE ON THE NOSE LANDING GEAR ACTUATOR) BLEW OUT IT'S BODY SEALING O-RING LEADING TO COMPLETE HYDRAULIC FLUID LOSS AFFECTING STEERING, BRAKING AND FLAP ACUATION. THIS HAPPENED ON TAXI FOR FLIGHT. THE LANDING GEAR REMAINED DOWN AND LOCKED. THE AIRCRAFT WAS TOWED BACK TO PARKING AND SUBSEQUENT MAINTENANCE AS A SAFETY PRECAUTION AS DIFFERENTIAL ENGINE POWER WAS THE ONLY STEERING METHOD AVAILABLE AFTER THIS FAILURE. THE VALVE WAS RESEALED WITH A NEW O-RING AND HAD THE SAME FAILURE AFTER ONE FLIGHT, AT WHICH TIME THE RESTRICTOR VALVE WAS REPLACED WITH A NEW UNIT. THIS FAILURE IS UNDER FURTHER INTERNAL COMPANY INVESTIGATION AS PART OF OUR CASP PROGRAM. THE TIME ON THE PART IS UNKNOWN BUT LISTED AS 1000HRS/CYCLES BELOW.
Part: CONTROL ROD — WORN (AILERON) · airframe 14,160 hrs
DURING INSPECTION, THE AILERON CONTROL ROD WAS FOUND TO BE WORN APPROX 15% OF THE THICKNESS. THE ROD WAS WORN FROM THE AILERON GUST LOCK SYS & SEEMS ONLY WEAR ON THE PILOTS OTBD SIDE DUE TO A SLIGHT MISALIGNMENT OF THE GUST LOCK.