# NTSB LAX78FUG25: Rand KR2, N31158, Corona, CA, May 11, 1978

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: May 11, 1978
- Place: Corona, CA · CORONA, CA
- Location: 33.8753° N, 117.5664° W: Placed by OpenAirDocs: center of Corona, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.8753&lon=-117.5664&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed, report June 28, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 142260
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX78FUG25
- Page: https://openairdocs.org/ntsb/LAX78FUG25

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0875  78/5/11  NR.CORONA,CA          RAND KR2            CR-  0  2  0  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1241                    N31158              PX-  0  0  0  DUAL                      AGE 50, 12300 TOTAL
                                       DAMAGE-DESTROYED    OT-  0  0  0                            HOURS, 90 IN TYPE,
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - CORONA MUNICIPAL
        DEPARTURE POINT             INTENDED DESTINATION
         CORONA,CA                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: CLIMB TO CRUISE
           STALL                                                    IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           MISCELLANEOUS ACTS,CONDITIONS - UNDER TORQUED
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        REMARKS- ALL 4 PLUGS FOUND ONLY FINGER TIGHT.
```

## Aircraft

- Registration: [N31158](https://openairdocs.org/deregistered/N31158-2019-03-02), registration cancelled 2019-03-02, S/N 6141-3, built 1977 (OpenAirDocs)
- Reported make and model: RAND KR2
- Registry model: [Stone-Koppe RAND KR-2](https://openairdocs.org/model/stone-koppe-rand-kr-2) (registry code 0564894) (OpenAirDocs)
- Registry engine: [Volkswagen CONVERSION](https://openairdocs.org/engine/volkswagen-conversion) (registry code 63501, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed
- Airport: Corona Municipal

## 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 19780511010439A](https://openairdocs.org/incident/19780511010439A), May 11, 1978: Amtrra KR/, Corona, CA, Destroyed. All 4 plugs found only finger tight.

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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