# NTSB MKC84LA129: Cessna 172M, N5010R, 5n 0lin, IA, April 25, 1984

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: April 25, 1984, 16:25 local (22:25 UTC)
- Place: 5n 0lin, IA
- Coordinates: 41.98994, -91.139358 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.9899&lon=-91.1394&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33672
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA129
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33672/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA129

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise - normal
  - engine assembly,connecting rod - failure,total (cause)
- Forced landing, landing - flare/touchdown
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - ditch (contributing factor)
- Nose over, landing - roll

## Analysis

WHILE CRUISING AT 3,000 FT MSL THE ENG RAN ROUGH. THE FLT NOTICED ZERO OIL PRESSURE. AS HE TURNED TOWARD A BEAN FIELD THE ENG FAILED. THE ACFT COLLIDED WITH A DITCH & NOSED OVER. THE ENG WAS DISASSEMBLED & AN ESTIMATED 3-4 QTS OF OIL WERE IN THE ENG CASE. THE #1 & #2 CONNECTING RODS WERE FOUND BROKEN. THE #4 PISTON EXHIBITED EVIDENCE OF BEING SUBJECTEDTO EXTREMELY HIGH TEMPERATURES.

## Aircraft

- Registration: [N5010R](https://openairdocs.org/deregistered/N5010R-1984-12-21), registration cancelled 1984-12-21, S/N 17263251 (OpenAirDocs)
- Reported make and model: CESSNA 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (registry code 2072418) (OpenAirDocs)
- Category: Airplane
- Serial number: 17263251
- Airframe hours: 1262
- Engines: LYCOMING O-320-E2D 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Communicator 6 Ltd
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 27, 1984, 62 hours before
- Departed: MIC, MINNEAPOLIS, MN
- Destination: DVN, DAVENPORT, IA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 467 total, 38 in this make and model, 381 as pilot in command, 12 in the last 90 days, 7 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 17 knots, gusting 24
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 68 °F, dew point -0 °F
- Altimeter: 29.00 inHg
- Observed at: CID, 27 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 19840425014429A](https://openairdocs.org/incident/19840425014429A), Apr 25, 1984: Cessna 172M, Olin, IA, Substantial damage. Engine threw a rod and seized. Nosed over in a ditch on emergency landing.

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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