# NTSB OAK67A0043: Sikorsky S-61N, N4606G, Mountain View, CA, October 11, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 11, 1966
- Place: Mountain View, CA · MOUNTAIN VIEW, CA
- Location: 37.3997° N, 122.0793° W: Placed by OpenAirDocs: center of Mountain View, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.3997&lon=-122.0793&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report August 28, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 121429
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK67A0043
- Page: https://openairdocs.org/ntsb/OAK67A0043

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0066  66/10/11   MOUNTAIN VIEW CAL   SIKORSKY S-61N      CR-  0  0  3  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1139                    N4606G              PX-  0  0  2                            33, 8832 TOTAL HOURS, 932
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - MOFFETT FIELD
        OPERATOR - SAN FRANCISCO AND OAKLAND HELICOPTER AIRLINES
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: BIRD INGESTION
           MISCELLANEOUS ACTS,CONDITIONS - FAILURE OF TWO OR MORE ENGINES
        FACTOR(S)
           TERRAIN - OTHER
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-2 ENGINES
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON WATER
        REMARKS- LANDED ON SHALLOW EVAPORATION POND.TAIL WHEEL STRUCK BOTTOM,REAR ROTOR BLADE STRUCK FUSELAGE.
```

## Aircraft

- Registration: [N4606G](https://openairdocs.org/deregistered/N4606G-1976-12-29), registration cancelled 1976-12-29, S/N 61224 (OpenAirDocs)
- Reported make and model: SIKORSKY S-61N
- Registry model: [Sikorsky S-61N](https://openairdocs.org/model/sikorsky-s-61n) (registry code 8142104) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage
- Airport: Moffett Field

## Other investigations on N4606G (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 OAK73IP020](https://openairdocs.org/ntsb/OAK73IP020), Nov 17, 1973: Sikorsky S-61N (N4606G), Oakland, CA, incident, minor damage
- [NTSB OAK66A0054](https://openairdocs.org/ntsb/OAK66A0054), Jun 6, 1966: Sikorsky S-61N (N4606G), San Francisco, CA, 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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