# NTSB DEN84LA112: Cessna 175, N7270M, Ogden, UT, March 29, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 29, 1984, 12:55 local (19:55 UTC)
- Place: Ogden, UT
- Coordinates: 41.150882, -111.979164 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.1509&lon=-111.9792&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16352
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN84LA112
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16352/pdf
- Page: https://openairdocs.org/ntsb/DEN84LA112

## 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, climb - to cruise
  - engine assembly,cylinder - fatigue (cause)
- Forced landing, landing
- Nose over, landing - roll
  - terrain condition - wet (contributing factor)
  - terrain condition - soft (contributing factor)

## Analysis

AFTER TAKEOFF, THE ENG BEGAN TO SMOKE & LOSE POWER. DURING A FORCED LANDING IN A MUDDY PLOWED FIELD, THE ACFT NOSED OVER. A COMPRESSION CHECK WAS ACCOMPLISHED & THE #5 CYLINDER WAS FOUND TO HAVE ZERO COMPRESSION. THE CYLINDER WAS REMOVED & FOUND TO BE CRACKED 2/3 OF THE WAY AROUND ITS CIRCUMFERENCE, 2-1/2 INCHES FROM THE MOUNTING BASE.

## Aircraft

- Registration: [N7270M](https://openairdocs.org/deregistered/N7270M-2013-05-07), registration cancelled 2013-05-07, S/N 55570, built 1958 (OpenAirDocs)
- Reported make and model: CESSNA 175
- Registry model: [Cessna 175](https://openairdocs.org/model/cessna-175) (registry code 2072502) (OpenAirDocs)
- Registry engine: [Continental GO-300 series](https://openairdocs.org/engine/continental-go-300-series) (registry code 17024, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 55570
- Airframe hours: 1980
- Engines: CONTINENTAL GO-300-A 175 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Roger Bolton
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 6, 1984, 232 hours before
- Departed: SLC, SALT LAKE CITY, UT
- Destination: TWF, TWIN FALLS, ID
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 223 total, 90 in this make and model, 156 as pilot in command, 11 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 10 knots
- Visibility: 50 statute miles
- Lowest ceiling: 10,000 ft broken
- Altimeter: 29.00 inHg

## 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 19840329007649A](https://openairdocs.org/incident/19840329007649A), Mar 29, 1984: Cessna 175, Ogden, UT, Substantial damage. Crash occurred during emergency landing after engine failure.

## Other investigations on N7270M (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 FTW70DRG15](https://openairdocs.org/ntsb/FTW70DRG15), Jan 25, 1970: Cessna 175 (N7270M), Chihuahua, Mexico, 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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