# NTSB CHI90DEE07: Schweizer G-164B, N8483K, Deer Grove, IL, June 26, 1990

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: June 26, 1990, 18:45 local (23:45 UTC)
- Place: Deer Grove, IL
- Coordinates: 41.609485, -89.679519 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.6095&lon=-89.6795&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report December 30, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14453
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90DEE07
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14453/pdf
- Page: https://openairdocs.org/ntsb/CHI90DEE07

## Probable cause

THE PILOT'S INADEQUATE VISUAL LOOKOUT, RESULTING IN COLLISION WITH A POWER LINE.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with object, maneuvering - aerial application
  - object - wire,transmission
  - visual lookout - inadequate, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - open field

## Analysis

A PILOT(ENGAGED IN AERIAL APPLICATION) HAD MADE A SURVEY PASS AROUND THE FIELD, NOTING A POWER LINE. ON THE FOURTH RUN, THE BIPLANE STRUCK THE BOTTOM LINE WITH ITS UPPER WING. THE PILOT STATED HE UNDERFLEW THE LINES ON AN EARLIER RUN, BUT ON THE ACCIDENT PASS, HE MISTOOK THE SECOND LINE FOR THE BOTTOM WIRE UNTIL TOO CLOSE TO CORRECT.

## Aircraft

- Registration: [N8483K](https://openairdocs.org/aircraft/N8483K), registered now, S/N 708B (OpenAirDocs)
- Reported make and model: SCHWEIZER G-164B
- Registry model: [Schweizer G-164B](https://openairdocs.org/model/schweizer-g-164b) (registry code 8059055) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 708B
- Airframe hours: 2616
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Packer, Richard L.
- Registered owner: Richard L Packer
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, February 19, 1990, 200 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 6,915 total, 2,700 in this make and model, 191 in the last 90 days, 130 in the last 30 days, 8 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: 24,200 ft overcast
- Temperature: 82 °F, dew point 70 °F
- Altimeter: 29.00 inHg
- Observed at: MIA, 38 nm away

## 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 19900626022729A](https://openairdocs.org/incident/19900626022729A), Jun 26, 1990: Scwzer G164B, Deer Grove, IL, Substantial damage. Flying under wires, struck powerline, rolled inverted impacted and stopped upright. Damage to aircraft extensive.

## Other investigations on N8483K (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 ERA25LA342](https://openairdocs.org/ntsb/ERA25LA342), Sep 9, 2025: Schweizer G-164B (N8483K), Dover, DE, substantial damage. Probable cause: The pilot’s exceedance of the critical angle of attack which resulted in an aerodynamic stall at an altitude too low to recover.

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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