# NTSB OAK71DVD18: Hughes 369HS, N9017F, Cotati, CA, November 26, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 26, 1970
- Place: Cotati, CA · COTATI, CA
- Location: 38.3285° N, 122.7100° W: Placed by OpenAirDocs: center of Cotati, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.3285&lon=-122.7100&mi=10
- Phase of flight: [Emergency descent](https://openairdocs.org/ntsb-phases/600) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 5, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 159574
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK71DVD18
- Page: https://openairdocs.org/ntsb/OAK71DVD18

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4487  70/11/26   COTATI,CALIF        HUGHES 369HS        CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 63, 104
        TIME - 1010                    N9017F              PX-  0  0  0  PRACTICE                  TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - NAVY STRIP
        DEPARTURE POINT             INTENDED DESTINATION
          SANTA ROSA,CALIF            COTATI,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: AUTOROTATIVE DESCENT
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS
           PILOT IN COMMAND - MISJUDGED SPEED AND ALTITUDE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- PWR RECOVERY AUTOROTATION,ENG DID NOT RESPOND TO THROTTLE.POST EXAM ENG OK.
```

## Aircraft

- Registration: [N9017F](https://openairdocs.org/deregistered/N9017F-2013-02-20), registration cancelled 2013-02-20, S/N 46-0509 (OpenAirDocs)
- Reported make and model: HUGHES 369HS
- Registry model: [Hughes 269A](https://openairdocs.org/model/hughes-269a) (registry code 4470402) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage
- Airport: Navy Strip

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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