# NTSB LAX69A0072: Aero Comdr 520, N4127B, Olberg, AZ, May 28, 1969

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: May 28, 1969
- Place: Olberg, AZ · OLBERG, AZ
- Location: 33.0923° N, 111.6862° W: Placed by OpenAirDocs: center of Olberg, AZ, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.0923&lon=-111.6862&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report December 18, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 171547
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX69A0072
- Page: https://openairdocs.org/ntsb/LAX69A0072

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2621  69/5/28  NR.OLBERG,ARIZ        AERO COMDR 520      CR-  1  0  0  NONCOMMERCIAL             COMMERCIAL, AGE 47, 4100
        TIME - 1530                    N4127B              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 10 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          WILCOX,ARIZ                 PHOENIX,ARIZ
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           STALL                                                    IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           MISCELLANEOUS ACTS,CONDITIONS - CARBON DEPOSITS
           MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE TEMPERATURE
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        FACTOR(S)
           WEATHER - HIGH TEMPERATURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        WEATHER BRIEFING - UNKNOWN/NOT REPORTED
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      104
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          110                                                       6
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
         FIRE AFTER IMPACT
        REMARKS- PLT KNEW BOTH ENGS WERE UNAIRWORTHY. R ENG FOUND FEATH. L ENG HAD 2 FOULED PLUGS.
```

## Aircraft

- Registration: [N4127B](https://openairdocs.org/deregistered/N4127B-2012-11-07), registration cancelled 2012-11-07, S/N 520-31, built 1952 (OpenAirDocs)
- Reported make and model: AERO COMDR 520
- Registry model: [Aero Commander 520](https://openairdocs.org/model/aero-commander-520) (registry code 0141202) (OpenAirDocs)
- Registry engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

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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