# NTSB CHI92DTG06: Cessna 188B, N9747G, Cogswell, ND, September 14, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: September 14, 1992, 16:15 local (21:15 UTC)
- Place: Cogswell, ND
- Coordinates: 46.099201, -97.780784 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.0992&lon=-97.7808&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 29, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15262
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92DTG06
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15262/pdf
- Page: https://openairdocs.org/ntsb/CHI92DTG06

## Probable cause

LOSS OF ENGINE POWER AS A RESULT OF A COMPLETE PISTON FAILURE.

## 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, maneuvering - aerial application
  - engine assembly,piston - failure,total (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll

## Analysis

THE PILOT WAS MAKING AN AERIAL APPLICATION WHEN HE EXPERIENCED A COMPLETE LOSS OF POWER.  HE MADE A FORCED LANDING IN A POTATO FIELD.  THE AIRPLANE NOSED-OVER DURING LANDING ROLLOUT.  THE INVESTIGATION REVEALED THAT THE NUMBER 6 PISTON ROD RETAINING PIN BOSS ON THE UNDERSIDE OF THE NUMBER 6 PISTON HAD FAILED.

## Aircraft

- Registration: [N9747G](https://openairdocs.org/aircraft/N9747G), registered now, S/N 18801587T (OpenAirDocs)
- Reported make and model: CESSNA 188B
- Registry model: [Cessna A188B](https://openairdocs.org/model/cessna-a188b) (registry code 2073005) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18801587T
- Airframe hours: 2077
- Engines: CONTINENTAL IO-520-D 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Dahl Airspray, Inc.
- Airworthiness certificate: Standard, Utility; Special, Restricted (Special)
- Last inspection: Annual, November 19, 1991, 101 hours before
- Departed: ND90
- Destination: ND90

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 5,640 total, 3,800 in this make and model, 5,351 as pilot in command, 70 in the last 90 days, 20 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 37 °F
- Altimeter: 30.00 inHg
- Observed at: FAR, 60 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 19920914036609A](https://openairdocs.org/incident/19920914036609A), Sep 14, 1992: Cessna 188B, Cogswell, ND, Substantial damage. Engine quit on spray run. Nosed over landing. Cylinder broken caused connecting to rod to break. Go through top of eng

## Other investigations on N9747G (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 CEN09LA447](https://openairdocs.org/ntsb/CEN09LA447), Jul 16, 2009: Cessna A188B (N9747G), Suring, WI, substantial damage. Probable cause: A loss of engine power resulting from the fatigue failure of the crankshaft due to the loss of engine case through-bolt torque. Contributing to the engine failure was the operator's failure to…

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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