# NTSB OAK76FVM31: Enstrom F-28A, N9577, San Carlos, CA, March 31, 1976

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: March 31, 1976
- Place: San Carlos, CA · SAN CARLOS, CA
- Location: 37.4990° N, 122.2676° W: Placed by OpenAirDocs: center of San Carlos, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.4990&lon=-122.2676&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report May 12, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 153004
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK76FVM31
- Page: https://openairdocs.org/ntsb/OAK76FVM31

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0756  76/3/31  NR.SAN CARLOS,CA      ENSTROM F-28A       CR-  0  0  2  MISCELLANEOUS             CERTIFICATE UNKNOWN, AGE
        TIME - 1230                    N9577               PX-  0  0  0  TEST                      30, 1055 TOTAL HOURS, 7
                                       DAMAGE-DESTROYED    OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - SAN CARLOS
        DEPARTURE POINT             INTENDED DESTINATION
         SAN CARLOS,CA                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ROLL OVER                                                LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER COMPENSATION FOR WIND CONDITIONS
        FACTOR(S)
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - OTHER
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          BROKEN                                                    2000
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      55
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          285                                                       20
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- RECEIVED WINDS FROM TOWER. GUSTING TO 30K.
```

## Aircraft

- Registration: [N9577](https://openairdocs.org/deregistered/N9577-2013-03-20), registration cancelled 2013-03-20, S/N 134, built 1972 (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: Destroyed
- Airport: San Carlos

## 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 19760331007319A](https://openairdocs.org/incident/19760331007319A), Mar 31, 1976: Enstrm F28A, San Carlos, CA, Substantial damage. Received winds from tower. Gusting to 30K.

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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