# NTSB CHI72FEE72: Cassutt 11M, N55MS, Naperville, IL, April 18, 1972

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: April 18, 1972
- Place: Naperville, IL · NAPERVILLE, IL
- Location: 41.7859° N, 88.1473° W: Placed by OpenAirDocs: center of Naperville, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.7859&lon=-88.1473&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report October 11, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 165841
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI72FEE72
- Page: https://openairdocs.org/ntsb/CHI72FEE72

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0399  72/4/18    NAPERVILLE,ILL      CASSUTT 11M         CR-  1  0  0  MISCELLANEOUS             PRIVATE, AGE 21, 345
        TIME - 0528                    N55MS               PX-  0  0  0  TEST                      TOTAL HOURS, 0 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - NAPERVILLE AERO
        DEPARTURE POINT             INTENDED DESTINATION
          NAPERVILLE,ILL              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: TRAFFIC PATTERN-CIRCLING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        FACTOR(S)
           PILOT IN COMMAND - LACK OF FAMILIARITY WITH AIRCRAFT
        REMARKS- PLT OVER CONTROLLED ON FIRST TURN IN PATTERN. INITIAL FLT IN ACFT.
```

## Aircraft

- Registration: [N55MS](https://openairdocs.org/deregistered/N55MS-1972-08-14), registration cancelled 1972-08-14, S/N MS1 (OpenAirDocs)
- Reported make and model: CASSUTT 11M
- Registry model: [Seymour CASSUTT IIM](https://openairdocs.org/model/seymour-cassutt-iim) (registry code 197042P) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed
- Airport: Naperville Aero

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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