# NTSB OAK66F0091: Cessna 172, N2559Y, Concord, CA, July 25, 1965

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 25, 1965
- Place: Concord, CA · CONCORD, CA
- Location: 37.9722° N, 122.0016° W: Placed by OpenAirDocs: center of Concord, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9722&lon=-122.0016&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 28, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 176735
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK66F0091
- Page: https://openairdocs.org/ntsb/OAK66F0091

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2708  65/7/25    CONCORD CALIF       CESSNA 172          CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 0930                    N2559Y              PX-  0  0  0  DUAL                      AGE 27, 597 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            48 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
        REMARKS- WING STRUCTURE DISTORTED DURING RECOVERY FROM UNUSUAL MANEUVER.
```

## Aircraft

- Registration: [N2559Y](https://openairdocs.org/aircraft/N2559Y), registered now, S/N 17249859 (OpenAirDocs)
- Reported make and model: CESSNA 172
- Registry model: [Cessna 172D](https://openairdocs.org/model/cessna-172d) (registry code 2072410) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

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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