# NTSB CHI90DEV04: Grumman G-164B, N6695Q, Princeton, IL, May 18, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: May 18, 1990, 16:00 local (21:00 UTC)
- Place: Princeton, IL
- Coordinates: 41.370258, -89.459472 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.3703&lon=-89.4595&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 29, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14498
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90DEV04
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14498/pdf
- Page: https://openairdocs.org/ntsb/CHI90DEV04

## Probable cause

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN ADEQUATE CLEARANCE FROM OBSTACLES DURING FLIGHT AT LOW ALTITUDE, RESULTING IN WIRE STRIKE.

## Analysis

THE AIRPLANE STRUCK THE LOWER OF TWO POWER LINES DURING AERIAL APPLICATION OF FUNGICIDE. ALTHOUGH IT SUSTAINED SUBSTANTIAL DAMAGE, THE PILOT LANDED WITHOUT REPORTED INJURY. HE STATED HE MISJUDGED CLEARANCE.

## 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 (contributing factor)
  - clearance - misjudged, pilot in command (cause)

## Aircraft

- Registration: [N6695Q](https://openairdocs.org/aircraft/N6695Q), registered now, S/N 209B, built 1977 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164B
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (registry code 3952802) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 209B
- Airframe hours: 2930
- Engines: P&W R-985-AN1 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Mitchell Aerial Application
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, October 29, 1989, 36 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 8,000 total, 3,000 in this make and model, 7,500 as pilot in command, 20 in the last 90 days, 20 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 68 °F, dew point -0 °F

## 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 19900518016909A](https://openairdocs.org/incident/19900518016909A), May 18, 1990: Scwzer G164B, Princeton, IL, Substantial damage. Struck a powerline during a spray run.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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