N774CB
Registered owner: CBHELOS LLC, VA (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| CHESAPEAKE BAY HELICOPTERS INC (4CZA) | 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, 2022-10-03 – 2026-05-28.
Part: LOCK NUT — FAILED (ZONE 100)
MS20143 NUTS ARE UTILIZED TO SECURE WITHIN THE ENGINE ASSEMBLY THE FOLLOWING ARTICLES COMPRESSOR, TURBINE, FUEL CONTROL, GOVERNOR, FUEL PUMP, TACH GENERATORS, GEARBOX SPLIT LINE, AND HAVE BEEN FOUND NUMEROUS OCCASIONS BACKING OFF. THE MS21043 NUTS HAVE BEEN RECEIVED NEW FROM MANUFACTURER WITH NO DRAG TORQUE. THE LOCKING FEATURE IS FAILING. LOT NUMBERS ARE NOT SIMILAR. LOT NUMBERS, A FEW ARE 54539-000, 206242-1, 101638, 7365911005, M001463-001. MANUFACTURERS ARE VARIOUS FROM ONE MONROE AEROSPACE, AVAIL (BOEING), TO ESNA. 3 SEPARATE TURBINE INSTALLATIONS WHERE NEW NUTS WERE INSTALLED FAILED. NUTS WERE TORQUED PER M250C20-OMM 10W2 72-50-00. THE LAST 3 COMPRESSOR INSTALLATION WHERE THE NUTS WERE REPLACED HAD THE SAME ISSUE WHERE THE BUTS WERE BACKING OFF.
Part: SPRAG CLUTCH — BROKEN (MAIN ROTOR) · airframe 6,724 hrs · 4,377 cycles
INITIAL CLUTCH WAS REMOVED FOR A DIFFERENT DISCREPANCY AND WAS FOUND TO HAVE A BAD SPRAG CLUTCH 300 HOURS AFTER OVERHAUL. NEXT CLUTCH WAS FOUND TO HAVE A BAD SPRAG CLUTCH 82 HOURS AFTER OVERHAUL. NEXT CLUTCH WAS FOUND TO HAVE A BAD SPRAG CLUTCH 0 TSO .