# NTSB CHI75FEP09: Pitts S1S, N66JS, Fon Du Lac, WI, July 28, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 28, 1974
- Place: Fon Du Lac, WI · FON DU LAC, WI
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 19, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 138713
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI75FEP09
- Page: https://openairdocs.org/ntsb/CHI75FEP09

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3647  74/7/28    FON DU LAC,WIS      PITTS S1S           CR-  0  0  1  NONCOMMERCIAL             AIRLINE TRANSPORT, AGE
        TIME - 1220                    N66JS               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  31, 10728 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            295 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - FON DU LAC
        DEPARTURE POINT             INTENDED DESTINATION
          FON DU LAC,WIS              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           POWERPLANT - FUEL SYSTEM: PUMPS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - WRONG PART
           TERRAIN - HIGH VEGETATION
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- DRIVE SHAFT FAILURE.PUMP NOT DESIGNED FOR THIS ENG.
```

## Aircraft

- Registration: [N66JS](https://openairdocs.org/aircraft/N66JS), registered now, S/N JS66, built 1973 (OpenAirDocs)
- Reported make and model: PITTS S1S
- Registry model: [Jerry Spear PITTS SPECIL S1S](https://openairdocs.org/model/jerry-spear-pitts-specil-s1s) (registry code 7220257) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Fon Du Lac

## 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 19740728027249A](https://openairdocs.org/incident/19740728027249A), Jul 28, 1974: Child S2PITT*, Fon Du Lac, WI, Substantial damage. Drive shaft failure. Pump not designed for this eng.

## Other investigations on N66JS (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 CHI76DEV11](https://openairdocs.org/ntsb/CHI76DEV11), Aug 31, 1975: Pitts S1S (N66JS), Centralia, 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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