# NTSB CHI68D0720: Beech 35-C33, N9493S, Crystal Lake, IL, March 30, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 30, 1968
- Place: Crystal Lake, IL · CRYSTAL LAKE, IL
- Location: 42.2332° N, 88.3344° W: Placed by OpenAirDocs: center of Crystal Lake, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.2332&lon=-88.3344&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report August 27, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 110492
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI68D0720
- Page: https://openairdocs.org/ntsb/CHI68D0720

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2016  68/3/30    CRYSTAL LAKE,ILL    BEECH 35-C33        CR-  0  0  2  MISCELLANEOUS             PRIVATE, AGE 34, UNK/NR
        TIME - 1300                    N9493S              PX-  0  0  2  DEMONSTRATION             TOTAL HOURS, UNK/NR IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - CRYSTAL LAKE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           COLLIDED WITH: DITCHES                                   LANDING: ROLL
        PROBABLE CAUSE(S)
           COPILOT - FAILED TO MAINTAIN DIRECTIONAL CONTROL
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           PILOT IN COMMAND - SELECTED WRONG RUNWAY RELATIVE TO EXISTING WIND
        FACTOR(S)
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  RELATIVE BEARING OF WIND
          NONE                                                     LEFT CROSS WIND 248-292 DEGREES
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          180                                                       18
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- LEFT CROSS WIND 90 DEG 18 KNOTS.
```

## Aircraft

- Registration: [N9493S](https://openairdocs.org/aircraft/N9493S), registered now, S/N CE-8, built 1966 (OpenAirDocs)
- Reported make and model: BEECH 35-C33
- Registry model: [Beech 35-C33A](https://openairdocs.org/model/beech-35-c33a) (registry code 1151410) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Crystal Lake

## Other investigations on N9493S (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 MKC67D0577](https://openairdocs.org/ntsb/MKC67D0577), May 13, 1967: Beech 35-C33 (N9493S), Dubuque, IA, 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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