# NTSB OAK71FVM17: Hughes 269C, N9611F, San Carlos, CA, September 21, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 21, 1970
- 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: No injuries
- Injuries: 2 uninjured
- Status: Completed, report November 8, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 158842
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK71FVM17
- Page: https://openairdocs.org/ntsb/OAK71FVM17

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4573  70/9/21    SAN CARLOS,CALIF    HUGHES 269C         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 0920                    N9611F              PX-  0  0  0  DUAL                      AGE 27, 5500 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            55 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - SAN CARLOS
        DEPARTURE POINT             INTENDED DESTINATION
          SAN CARLOS,CALIF            LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
           ROLL OVER                                                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           DUAL STUDENT - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
           DUAL STUDENT - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
        REMARKS- PRACTICE AUTOROTATION.
```

## Aircraft

- Registration: [N9611F](https://openairdocs.org/deregistered/N9611F-2011-07-19), registration cancelled 2011-07-19, S/N 700018, built 1970 (OpenAirDocs)
- Reported make and model: HUGHES 269C
- Registry model: [Hughes 269C](https://openairdocs.org/model/hughes-269c) (registry code 4470504) (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: San Carlos

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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