# NTSB LAX70F0140: Hughes 269B, N9525F, Lakewood, CA, August 17, 1969

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: August 17, 1969
- Place: Lakewood, CA · LAKEWOOD, CA
- Location: 33.8471° N, 118.1219° W: Placed by OpenAirDocs: center of Lakewood, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.8471&lon=-118.1219&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor
- Status: Completed, report December 12, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 164716
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX70F0140
- Page: https://openairdocs.org/ntsb/LAX70F0140

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2563  69/8/17    LAKEWOOD,CALIF      HUGHES 269B         CR-  0  1  0  MISCELLANEOUS             COMMERCIAL, AGE 41, 1755
        TIME - 1157                    N9525F              PX-  0  0  1  POLICE PATROL             TOTAL HOURS, 720 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - LONG BEACH INTL
        DEPARTURE POINT             INTENDED DESTINATION
          LONG BEACH,CALIF            LOCAL FLT
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: NORMAL CRUISE
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: AUTOROTATIVE DESCENT
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR PULLEYS,BELTS
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
           PILOT IN COMMAND - SELECTED UNSUITABLE TERRAIN
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- FATIGUE FAILURE OF ELECTRO MECH ACTUATOR CREATING DISCONNECT OF POWER DRIVE PULLY BELTS TO ENGINE.
```

## Aircraft

- Registration: [N9525F](https://openairdocs.org/deregistered/N9525F-1973-10-26), registration cancelled 1973-10-26, S/N 180352 (OpenAirDocs)
- Reported make and model: HUGHES 269B
- Registry model: [Hughes 269B](https://openairdocs.org/model/hughes-269b) (registry code 4470502) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed
- Airport: Long Beach Intl

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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