# NTSB LAX66F0272: Monocoupe 90, N520W, Long Beach, CA, February 27, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: February 27, 1966
- Place: Long Beach, CA · LONG BEACH, CA
- Location: 33.7670° N, 118.1892° W: Placed by OpenAirDocs: center of Long Beach, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.7670&lon=-118.1892&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 17, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 173245
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX66F0272
- Page: https://openairdocs.org/ntsb/LAX66F0272

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0700  66/2/27    LONG BEACH CALIF    MONOCOUPE 90        CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 33, 1180
        TIME - 1030                    N520W               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 0 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - LONG BEACH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: PISTON,PISTON RINGS
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
           MISCELLANEOUS ACTS,CONDITIONS - OIL STARVATION
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- NO.2 AND 3 CYLINDER PISTON OIL CONTROL RINGS IMPROPERLY INSTALLED
```

## Aircraft

- Registration: [N520W](https://openairdocs.org/aircraft/N520W), registered now, S/N 559, built 1930 (OpenAirDocs)
- Reported make and model: MONOCOUPE 90
- Registry model: [Monocoupe 90](https://openairdocs.org/model/monocoupe-90) (registry code 5810102) (OpenAirDocs)
- Registry engine: [Lambert R266](https://openairdocs.org/engine/lambert-r266) (registry code 38501, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Long Beach

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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