# NTSB CHI87LA143: Cessna 172N, N4691G, Prairie Duchien, WI, June 12, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 12, 1987, 11:40 local (16:40 UTC)
- Place: Prairie Duchien, WI
- Coordinates: 43.039936, -91.139022 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.0399&lon=-91.1390&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report May 27, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 13775
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI87LA143
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13775/pdf
- Page: https://openairdocs.org/ntsb/CHI87LA143

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - window,flight compartment window/windshield - separation (cause)
  - maintenance,major repair - inadequate, company maintenance personnel (cause)
  - maintenance,replacement - not performed, company maintenance personnel (cause)
  - aircraft preflight - inadequate, pilot in command (contributing factor)
- Forced landing, descent - emergency
- Nose gear collapsed, landing - flare/touchdown
  - terrain condition - soft (contributing factor)

## Analysis

WHILE IN CRUISE FLIGHT, TAPE WHICH WAS HOLDING A PIECE OF PLEXIGLASS OVER THE CRACKED WINDSHIELD CAME LOOSE. THE WINDSHIELD LIFTED UP AND THE PILOT WAS NOT ABLE TO MAINTAIN ALTITUDE. DURING THE FORCED LANDING IN A SOFT FIELD. THE NOSE GEAR SHEARED OFF.

## Aircraft

- Registration: [N4691G](https://openairdocs.org/aircraft/N4691G), registered now, S/N 17273317 (OpenAirDocs)
- Reported make and model: CESSNA 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (registry code 2072434) (OpenAirDocs)
- Category: Airplane
- Serial number: 17273317
- Airframe hours: 1982
- Engines: LYCOMING O-320-H2AD 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Leaders Flying Service
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, March 26, 1987, 78 hours before
- Departed: BMI, BLOOMINGTON, IL
- Destination: FCM, MINNEAPOLIS, MN

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; private; airplane ratings: single-engine land, multi-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 2,300 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 13 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 57 °F
- Altimeter: 29.00 inHg
- Observed at: LSE, 52 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 19870612020229A](https://openairdocs.org/incident/19870612020229A), Jun 12, 1987: Cessna 172N, Prairie Du Chie, WI, Substantial damage. A plexiglass patch on a cracked windshield came loose. The aircraft was unable to remain airborne.

## Other investigations on N4691G (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 BFO86LA001](https://openairdocs.org/ntsb/BFO86LA001), Oct 4, 1985: Cessna 172N (N4691G), Annapolis, MD, 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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