# NTSB LAX74FUG30: Schmidt JR II, N17RS, Chino, CA, November 25, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 25, 1973
- 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: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 7, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187545
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX74FUG30
- Page: https://openairdocs.org/ntsb/LAX74FUG30

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3826  73/11/25   CHINO,CALIF         SCHMIDT  JR II      CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 60, 2725
        TIME - 0930                    N17RS               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 125 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - CHINO
        DEPARTURE POINT             INTENDED DESTINATION
          CHINO,CALIF                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: HOVERING
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: MAIN ROTOR HEAD ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: POOR/INADEQUATE DESIGN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- MAIN ROTOR ATTACH BOLTS FAILED.
```

## Aircraft

- Registration: [N17RS](https://openairdocs.org/deregistered/N17RS-1990-11-07), registration cancelled 1990-11-07, S/N 101 (OpenAirDocs)
- Reported make and model: SCHMIDT  JR II
- Registry model: [Schmidt HELICOM COMMUTER JR.](https://openairdocs.org/model/schmidt-helicom-commuter-jr) (registry code 0570103) (OpenAirDocs)
- Category: Helicopter, amateur-built
- Engines: reciprocating
- Damage: Destroyed
- Airport: Chino

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19731125038129A](https://openairdocs.org/incident/19731125038129A), Nov 25, 1973: Amtr 0570103, Chino, CA, Substantial damage. Main rotor attach bolts failed.

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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