# NTSB CHI86LA196: Piper PA-20-115, Mosinee, WI, August 3, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 3, 1986, 09:58 local (14:58 UTC)
- Place: Mosinee, WI
- Coordinates: 44.779075, -89.679328 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.7791&lon=-89.6793&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 13503
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI86LA196
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13503/pdf
- Page: https://openairdocs.org/ntsb/CHI86LA196

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - weather condition - crosswind (contributing factor)
  - compensation for wind conditions - inaccurate, pilot in command (cause)
  - remedial action - excessive, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command
- On ground/water encounter with terrain/water, landing - roll

## Analysis

FOLLOWING DEPARTURE FROM OSHKOSH, WI, THE PLT PROCEEDED DIRECTLY TO CENTRAL WISCONSIN AIRPORT, MOSINEE, WI, AT APRX 2500 FT MSL. AFTER RECEIVING AN ARPT ADVISORY FROM THE CENTRAL WISCONSIN UNICOM, THE PLT LANDED ON RWY 26. ACCORDING TO THE PLT, A 30-35 DEG CROSSWIND OF ABOUT 10 KNOTS GUSTING TO 15 KNOTS EXISTED AT THE TIME. THE PLT REPORTED THAT DURING THE LANDING ROLL HE REPOSITIONED HIS FEET ON THE RUDDER CONTROLS AND THE ACFT IMMEDIATELY SWERVED. THE PLT STATED THAT IN AN ATTEMPT TO REGAIN DIRECTIONAL CONTROL, HE OVERCORRECTED AND THE ACFT GROUND LOOPED.

## Aircraft

- Registration: CGHGF (not matched to a registry record)
- Reported make and model: PIPER PA-20-115
- Category: Airplane
- Serial number: 20-305
- Airframe hours: 1717
- Engines: LYCOMING O-290-D 125 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: A. Timothy Kelly
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 20, 1984, 58 hours before
- Departed: OSH, OSHKOSH, WI
- Destination: CWA, MOSINEE, WI
- Airport: CWA, Central Wisconsin Airport, runway 26, 7,645 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 437 total, 63 in this make and model, 332 as pilot in command, 47 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 290° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 68 °F, dew point 57 °F
- Altimeter: 30.00 inHg
- Observed at: CWA

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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