# NTSB LAX70D0154: Cougar DM-1, N9676Z, Chino, CA, September 28, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 28, 1969
- Place: Chino, CA · CHINO, CA
- Location: 33.9763° N, 117.6745° W: Placed by OpenAirDocs: center of Chino, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.9763&lon=-117.6745&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 13, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 151636
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX70D0154
- Page: https://openairdocs.org/ntsb/LAX70D0154

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4097  69/9/28    CHINO,CALIF         COUGAR DM-1         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 37, 117
        TIME - 1550                    N9676Z              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 25 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - CHINO
        DEPARTURE POINT             INTENDED DESTINATION
          CHINO,CALIF                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: TAILWHEEL ASSEMBLIES
          PILOT-BUILDR/OWNR ALTERED,WEAKENED,T/W FORK DESIGN
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
```

## Aircraft

- Registration: [N9676Z](https://openairdocs.org/deregistered/N9676Z-2013-03-21), registration cancelled 2013-03-21, S/N 1, built 1969 (OpenAirDocs)
- Reported make and model: COUGAR DM-1
- Registry model: [Cougar DM1](https://openairdocs.org/model/cougar-dm1) (registry code 62501CX) (OpenAirDocs)
- Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Chino

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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