# NTSB OAK70DVM15: Hughes 269B, N13470, San Carlos, CA, May 1, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 1, 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: [Emergency descent](https://openairdocs.org/ntsb-phases/600) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 23, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 130650
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK70DVM15
- Page: https://openairdocs.org/ntsb/OAK70DVM15

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2020   70/5/1    SAN CARLOS,CALIF    HUGHES 269B         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1530                    N13470              PX-  0  0  0  DUAL                      AGE 25, 2155 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            435 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - SAN CARLOS
        DEPARTURE POINT             INTENDED DESTINATION
          SAN CARLOS,CALIF            LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: AUTOROTATIVE DESCENT
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           POWERPLANT - ENGINE CONTROLS: THROTTLE-POWER LEVER ASSEMBLIES
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: COLLECTIVE PITCH CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- LOCKNUT P/N269A9957 BACKED OFF.HUGHES SV INFO NOTICE COVERS.
```

## Aircraft

- Registration: [N13470](https://openairdocs.org/deregistered/N13470-2003-11-22), registration cancelled 2003-11-22, S/N 125-0220, built 1965 (OpenAirDocs)
- Reported make and model: HUGHES 269B
- Registry model: [Hughes 269B](https://openairdocs.org/model/hughes-269b) (registry code 4470502) (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

## Other investigations on N13470 (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 LAX82FUA06](https://openairdocs.org/ntsb/LAX82FUA06), Dec 9, 1981: Hughes 269B (N13470), Torrance, CA, substantial damage
- [NTSB OAK69D0276](https://openairdocs.org/ntsb/OAK69D0276), Feb 25, 1969: Hughes 269B (N13470), Panoche, 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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