# NTSB NYC75FNA19: Enstrom F-28A, N4879, Marshfied, MA, October 3, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 3, 1974
- Place: Marshfied, MA · MARSHFIED, MA
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 23, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 142490
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC75FNA19
- Page: https://openairdocs.org/ntsb/NYC75FNA19

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3584   74/10/3   MARSHFIED,MASS      ENSTROM F-28A       CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 36, 3270
        TIME - 1100                    N4879               PX-  0  0  1  CORP/EXEC                 TOTAL HOURS, 870 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - MARSHFIELD
        DEPARTURE POINT             INTENDED DESTINATION
          BEVERLY,MASS                MARSHFIED,MASS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            LANDING: OTHER
           ROLL OVER                                                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - LOOSE,PART/FITTING
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
           TERRAIN - ROUGH/UNEVEN
        FACTOR(S)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: POOR/INADEQUATE DESIGN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- JAM NUT,AN316-5,LOOSE.ROD DISCONNECTED FM BELT TENSIONING ASSY RLSNG TENSION ON ROTOR DRIVE BELT.
```

## Aircraft

- Registration: [N4879](https://openairdocs.org/deregistered/N4879-2012-08-08), registration cancelled 2012-08-08, S/N 030, built 1969 (OpenAirDocs)
- Reported make and model: ENSTROM F-28A
- Registry model: [Enstrom F-28A](https://openairdocs.org/model/enstrom-f-28a) (registry code 3300406) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Marshfield

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19741003031169A](https://openairdocs.org/incident/19741003031169A), Oct 3, 1974: Enstrm F28A, Marshfied, MA, Substantial damage. Jam nut,AN316-5,loose. Rod disconnected fm belt tensioning assy rlsng tension on rotor drive belt.

## Other investigations on N4879 (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 NYC73FNA33](https://openairdocs.org/ntsb/NYC73FNA33), Dec 23, 1972: Enstrom F-28A (N4879), Marshfield, MA, substantial damage

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.

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