# N745BW: Mcdonnell Douglas Helicopter 600N, registration cancelled 2022-06-04

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: June 4, 2022
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Mcdonnell Douglas Helicopter 600N](https://openairdocs.org/model/mcdonnell-douglas-helicopter-600n) (registry code 3027377)
- Engine: [Allison 250-C47 series](https://openairdocs.org/engine/allison-250-c47-series) (registry code 03029)
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE), [TCDS E1GL](https://openairdocs.org/tcds/E1GL) (OpenAirDocs)
- Serial number: RN045
- Type of aircraft: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, normal
- Airworthiness date: November 25, 1998
- Certificate issued: February 19, 2019
- Last registry action: February 19, 2019
- Mode S code: AA054B
- Owner when cancelled: [Cobra Aviation Services LLC](https://openairdocs.org/faa-owner/COBRA%20AVIATION%20SERVICES%20LLC)
- Location: [Oklahoma City, OK](https://openairdocs.org/faa-place/OK/Oklahoma%20City)
- Owner type: LLC
- Owner's area on the map: 35.6151° N, 97.5694° W: Placed by OpenAirDocs at the center of ZIP code 73134, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N745BW
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=745BW
- Page: https://openairdocs.org/deregistered/N745BW-2022-06-04

From the FAA registry file of November 4, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Mcdonnell Douglas Helicopter 600N: https://openairdocs.org/model/mcdonnell-douglas-helicopter-600n.md

## Service difficulty reports (2)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR 2020F00346](https://openairdocs.org/sdr/2020F00346), Jul 27, 2020: ENGINE. FAILED. THE FRONT PASSENGER AND I DETECTED THE SMELL OF SMOKE IN THE FRONT OF THE CABIN AND SAW SMOKE RISING FROM UNDER THE FORWARD SEAT AREA. FROM APPROXIMATELY 250FT 
- [SDR 2016FA0000080](https://openairdocs.org/sdr/2016FA0000080), Feb 9, 2016: BLADE. CRACKED. 4.5 INCH CRACK IN THE UPPER AND LOWER MAIN ROTOR BLADE SKIN AT BS 91.

## NTSB investigations (2)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR20LA228](https://openairdocs.org/ntsb/WPR20LA228), Jul 20, 2020: Md Helicopter 600 (N745BW), San Andreas, CA, destroyed. Probable cause: The failure of the output shaft of the overrunning clutch inner race due to frictional overheating of the shaft, which resulted from the failure of the output bearing’s stainless-steel grease seal.
- [NTSB WPR16LA081](https://openairdocs.org/ntsb/WPR16LA081), Feb 5, 2016: Mcdonnell Douglas Helicopter 600N (N745BW), Ashland, OR, substantial damage. Probable cause: Fatigue cracking of a main rotor blade for reasons that could not be determined based on the available information.

## FAA accident and incident reports (2)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20200720011699A](https://openairdocs.org/incident/20200720011699A), Jul 20, 2020: Mcdonnell Douglas Helicopter 600N (N745BW), San Andreas, CA, Destroyed. Helicopter hovering over checking a transmission wire ? Pilot in left seat and lineman in right and rear airspeed 15 mph 250 feet above the ground. Fire…
- [Accident 20160215001699A](https://openairdocs.org/incident/20160215001699A), Feb 15, 2016: Mcdonnell Douglas Helicopter 600N (N745BW), Ashland, OR, No damage. The pilot noticed an abnormal vibration in the aircraft. On landing an examination of the main rotor blade revealed a 4.5 inch crack measured from the trailing…

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