# NTSB CHI88DEP11: Grumman-Schweizer G-164A, N8495, Plover, WI, August 17, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 17, 1988, 09:00 local (14:00 UTC)
- Place: Plover, WI
- Coordinates: 44.460304, -89.540298 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.4603&lon=-89.5403&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 11, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 13883
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI88DEP11
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13883/pdf
- Page: https://openairdocs.org/ntsb/CHI88DEP11

## Sequence of events

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

- In flight collision with object, maneuvering - turn to reverse direction
  - preflight planning/preparation - inadequate, pilot in command (cause)
  - weather condition - turbulence (contributing factor)
  - weather condition - high density altitude (contributing factor)
  - aircraft performance,climb capability - exceeded (contributing factor)
  - load jettison - initiated, pilot in command
  - stall/mush (cause)
  - object - tree(s) (contributing factor)
  - object - building(nonresidential) (contributing factor)

## Analysis

THE AIRCRAFT COLLIDED WITH A FARM MACHINERY SHED DURING AN AERIAL APPLICATION MANEUVER. THE PILOT STATED THAT THERE WAS NO POWERPLANT OR CONTROL MALFUNCTION. THE TEMPERATURE AT THE ACCIDENT SITE WAS 87 DEGREES (F), WITH A CALCULATED DENSITY ALTITUDE OF 2944 FEET. THE PILOT STATED THAT AN ENE WIND OFF A RIDGE JUST EAST OF THE FLIGHT PATH CREATED TURBULENCE.

## Aircraft

- Registration: [N8495](https://openairdocs.org/deregistered/N8495-1994-04-25), registration cancelled 1994-04-25, S/N 883 (OpenAirDocs)
- Reported make and model: Grumman-Schweizer G-164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Category: Airplane
- Serial number: 883
- Airframe hours: 4317
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Jeffery R. Reabe, doing business as Reabe Flying Service
- Registered owner: Reabe Jeffery R.
- Airworthiness certificate: Standard, Normal; Standard, Utility
- Last inspection: Annual, December 8, 1987, 432 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 3,100 total, 1,500 in this make and model, 3,030 as pilot in command, 400 in the last 90 days, 200 in the last 30 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 88 °F, dew point 72 °F
- Altimeter: 29.00 inHg
- Observed at: MSN, 75 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 19880817033979A](https://openairdocs.org/incident/19880817033979A), Aug 17, 1988: Scwzer G164A, Plover, WI, Substantial damage. Caught in turbulence on a turn around from a spray run. Hit tree tops and crashed into a metal farm machinery shed.

## Other investigations on N8495 (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 SEA85LA074](https://openairdocs.org/ntsb/SEA85LA074), Mar 14, 1985: Grumman 164A (N8495), Ritzville, WA, 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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