# NTSB CHI75DEM32: Aeronca 11AC, N85931, Ontonagon, MI, March 19, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 19, 1975
- Place: Ontonagon, MI · ONTONAGON, MI
- Location: 46.8663° N, 89.3124° W: Placed by OpenAirDocs: center of Ontonagon, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.8663&lon=-89.3124&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 28, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 148252
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI75DEM32
- Page: https://openairdocs.org/ntsb/CHI75DEM32

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0708  75/3/19    ONTONAGON,MI        AERONCA 11AC        CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 46, 403
        TIME - 1800                    N85931              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 1 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ONTONAGON COUNTY
        DEPARTURE POINT             INTENDED DESTINATION
          ONTONAGON,MI                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           AIRFRAME - LANDING GEAR: MAIN GEAR-SHOCK ABSORBING ASSY,STRUTS,ATTACHMENTS,ETC.
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
```

## Aircraft

- Registration: [N85931](https://openairdocs.org/aircraft/N85931), registered now, S/N 11AC-346, built 1946 (OpenAirDocs)
- Reported make and model: AERONCA 11AC
- Registry model: [Aeronca 11AC](https://openairdocs.org/model/aeronca-11ac) (registry code 0191102) (OpenAirDocs)
- Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ontonagon County

## 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 19750319008239A](https://openairdocs.org/incident/19750319008239A), Mar 19, 1975: Blanca 11AC, Ontonagon, MI, 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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