# NTSB CHI70D0287: Mooney M20E, N79840, Northbrook, IL, August 31, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 31, 1969
- Place: Northbrook, IL · NORTHBROOK, IL
- Location: 42.1287° N, 87.8352° W: Placed by OpenAirDocs: center of Northbrook, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.1287&lon=-87.8352&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report May 1, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 155354
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI70D0287
- Page: https://openairdocs.org/ntsb/CHI70D0287

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3823  69/8/31    NORTHBROOK,ILL      MOONEY M20E         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 35, 753
        TIME - 1030                    N79840              PX-  0  0  2  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 12 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - SKY HARBOR
        DEPARTURE POINT             INTENDED DESTINATION
          NORTHBROOK,ILL              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           UNDERSHOOT                                               LANDING: FINAL APPROACH
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED DISTANCE AND ALTITUDE
           PILOT IN COMMAND - DELAYED IN INITIATING GO-AROUND
           AIRPORTS/AIRWAYS/FACILITIES - AIRPORT CONDITIONS: OTHER
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        REMARKS- ENCTRD HIGH SINK RATE,STRUCK FENCE,NOSE GR COLLAPSED AFTER CTC WITH EXPOSED RNWY LIP.
```

## Aircraft

- Registration: [N79840](https://openairdocs.org/aircraft/N79840), registered now, S/N 504, built 1964 (OpenAirDocs)
- Reported make and model: MOONEY M20E
- Registry model: [Mooney M20E](https://openairdocs.org/model/mooney-m20e) (registry code 5870212) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Sky Harbor

## Other investigations on N79840 (1)

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.

- [NTSB CHI81FEE05](https://openairdocs.org/ntsb/CHI81FEE05), Nov 2, 1980: Mooney M20E (N79840), Chicago, IL, 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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