# NTSB CHI70FBD24: Rolladen LS-1B, N921WR, Plainfield, IL, June 7, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 7, 1970
- Place: Plainfield, IL · PLAINFIELD, IL
- Location: 41.6294° N, 88.2456° W: Placed by OpenAirDocs: center of Plainfield, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.6294&lon=-88.2456&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 25, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 124509
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI70FBD24
- Page: https://openairdocs.org/ntsb/CHI70FBD24-124509

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2464   70/6/7    PLAINFIELD,ILL      ROLLADEN LS-1B      CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, FL.INSTR.,
        TIME - 1620                    N921WR              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  AGE 41, 1663 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            30 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - CLOW
        DEPARTURE POINT             INTENDED DESTINATION
          PLAINFIELD,ILL              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           AIRFRAME - FLIGHT CONTROL SURFACES: SPOILERS AND SLOTS-LEADING EDGE FLAPS,SPEED BRAKES
        EMERGENCY CIRCUMSTANCES - PITCH CONTROL PROBLEM
                                  UNUSUAL NOISE
        REMARKS- PLT HEARD LOUD NOISE,ACFT STARTED SHAKING,PLT LOST CTL,BAILED OUT.SPOILERS FOUND IN EXTENDED POSIT
```

## Aircraft

- Registration: [N921WR](https://openairdocs.org/aircraft/N921WR), registered now, S/N L-26/69, built 1969 (OpenAirDocs)
- Reported make and model: ROLLADEN LS-1B
- Registry model: [Rolladen-Schneider LS-1B](https://openairdocs.org/model/rolladen-schneider-ls-1b) (registry code 3801206) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider
- Engines: none
- Damage: Substantial damage
- Airport: Clow

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.