# NTSB CHI83IA442: Cessna 172RG, N4963V, Shell Lake, WI, September 24, 1983

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: September 24, 1983, 08:00 local (13:00 UTC)
- Place: Shell Lake, WI
- Coordinates: 45.729614, -91.890899 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.7296&lon=-91.8909&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12057
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI83IA442
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12057/pdf
- Page: https://openairdocs.org/ntsb/CHI83IA442

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - engine assembly,push rod - bent (cause)

## Analysis

THE NUMBER 4 EXHAUST PUSHROD FAILED IN FLIGHT FOR AN UNDETERMINED REASON.

## Aircraft

- Registration: N4963V (not matched to a registry record)
- Reported make and model: CESSNA 172RG
- Category: Airplane
- Serial number: 172RG0431
- Airframe hours: 1060
- Engines: LYCOMING O-360-AA6 160 horsepower reciprocating
- Damage: No damage
- Flight: Part 135
- Registered owner: Northern Wings
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, March 1, 1983, 50 hours before
- Departed: WI32, LA POINTE, WI
- Destination: STP, ST. PAUL, MN
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 24; flight instructor, commercial; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 1,362 total, 16 in this make and model, 1,224 as pilot in command, 110 in the last 90 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 20 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 39 °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).

- [Incident 19830924068109I](https://openairdocs.org/incident/19830924068109I), Sep 24, 1983: Cessna 172RG, Shell Lake, MN. Lost power en route. Landed in an open field. Nr 4 cylinder pushrod bent. Would not allow valve to fully open.

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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