# NTSB CHI78FEP45: Snow S2C, N1638S, Bancroft, WI, July 11, 1978

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: July 11, 1978
- Place: Bancroft, WI · BANCROFT, WI
- Location: 44.3086° N, 89.5062° W: Placed by OpenAirDocs: center of Bancroft, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.3086&lon=-89.5062&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report September 19, 1978
- Report: Brief approved by the director
- ADs cited in the narratives: [AD 66-14-01](https://openairdocs.org/ad/66-14-01) (OpenAirDocs)
- NTSB case key (mKey): 140892
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI78FEP45
- Page: https://openairdocs.org/ntsb/CHI78FEP45

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1964  78/7/11  NR.BANCROFT,WI        SNOW S2C            CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 38, 11000
        TIME - 0944                    N1638S              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 2000 IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         BANCROFT,WI                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: STARTING SWATH RUN
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           AIRFRAME - WINGS: RIBS,STRINGER,CAP STRIPS
           MISCELLANEOUS ACTS,CONDITIONS - WRONG PART
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 7500                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - POTATOES                                  TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  800                 SWATH RUN-HOW FLOWN - WIND CALM
        REMARKS- AD 66-14-01(I) REQD STEEL SPAR CAPS.NO STEEL SPAR CAPS FOUND ON ACFT.
```

## Aircraft

- Registration: [N1638S](https://openairdocs.org/deregistered/N1638S-2009-09-18), registration cancelled 2009-09-18, S/N 450-1195C, built 1963 (OpenAirDocs)
- Reported make and model: SNOW S2C
- Registry model: [Snow S2C](https://openairdocs.org/model/snow-s2c) (registry code 8380206) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Farm Field

## 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 19780711022899A](https://openairdocs.org/incident/19780711022899A), Jul 11, 1978: Ayres S2B, Bancroft, WI, Substantial damage. AD 66-14-01(I) reqd steel spar caps. No steel spar caps found on a

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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