# N4278M: 1973 Hughes 369HS, registration cancelled 2014-03-18

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: March 18, 2014
- Exported to: Singapore
- Status when cancelled: Third renewal notice
- Airframe: [Hughes 369HS](https://openairdocs.org/model/hughes-369hs) (registry code 4470728)
- Engine: [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series) (registry code 03020)
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE), [TCDS E4CE](https://openairdocs.org/tcds/E4CE) (OpenAirDocs)
- Serial number: 230450S
- Year built: 1973
- Type of aircraft: Rotorcraft
- Engine type: Turbo-prop
- Airworthiness: Standard, normal
- Airworthiness date: May 23, 1991
- Certificate issued: December 17, 1998
- Last registry action: May 12, 2006
- Mode S code: A5191C
- Owner when cancelled: [Hoffman Helicopters Inc](https://openairdocs.org/faa-owner/HOFFMAN%20HELICOPTERS%20INC)
- Location: Tamuning, GU, Guam
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N4278M
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4278M
- Page: https://openairdocs.org/deregistered/N4278M-2014-03-18

From the FAA registry file of October 29, 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 Hughes 369HS: https://openairdocs.org/model/hughes-369hs.md

## NTSB investigations (1)

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 LAX99LA253](https://openairdocs.org/ntsb/LAX99LA253), Jun 7, 1999: Hughes 369HS (N4278M), Pacific Ocean (Pacific Ocean), destroyed. Probable cause: The removal of the tail rotor blade abrasion strips by the use of an unapproved method by the maintenance personnel which resulted in the imbalance of the tail rotor blade assembly and subsequent…

## FAA accident and incident reports (1)

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 19990607023849A](https://openairdocs.org/incident/19990607023849A), Jun 7, 1999: Hughes 369HS (N4278M), Destroyed. (.19) On June 7, 1999, at 0900 hours local time, a Hughes 369HS, N4278M, crashed into the pacific ocean following separation of the tail rotor gear box…

## Other aircraft with N4278M

- [Registered now](https://openairdocs.org/aircraft/N4278M): Maule MXT-7-180A, S/N 21077C
- [Cancelled 1963-10-14](https://openairdocs.org/deregistered/N4278M-1963-10-14): Piper PA-12, S/N 12-3207. Owner: [Earl G Strohpaul](https://openairdocs.org/faa-owner/EARL%20G%20STROHPAUL), [Grand Rapids, MI](https://openairdocs.org/faa-place/MI/Grand%20Rapids)

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