# NTSB DEN88LA067: Cessna 180, N7661A, Roundup, MT, February 10, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: February 10, 1988, 15:00 local (22:00 UTC)
- Place: Roundup, MT
- Coordinates: 46.439571, -108.510032 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.4396&lon=-108.5100&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 30, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 17447
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN88LA067
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17447/pdf
- Page: https://openairdocs.org/ntsb/DEN88LA067

## Sequence of events

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

- Loss of control - on ground/water, landing - flare/touchdown
  - terrain condition - snow covered (contributing factor)
  - airport snow removal - not performed, airport personnel (contributing factor)
  - in-flight planning/decision - inadequate, pilot in command (cause)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - notams - delayed, airport personnel (contributing factor)
- Nose over, landing - flare/touchdown

## Analysis

THE PRIVATE PLT RANCHER WAS COMPLETING A WORK FLT. DURING THE FLT, THE PLT MADE 5 OFF ARPT LANDINGS IN SNOW 5 TO 6 INCHES DEEP. THE LANDING ON WHICH THE ACCIDENT OCCURRED WAS MADE AT A LOCAL ARPT ON A SNOW COVERED RWY. DURING THE LANDING, THE ACFT SANK INTO DEEP SNOW AND NOSED OVER. AFTER THE ACCIDENT, THE DEPTH OF THE SNOW ON THE RWY WAS DETERMINED TO BE APRX 12 INCHES. NO NOTAMS PERTAINING TO SNOW ON THE RWY WERE ISSUED PRIOR TO THE ACCIDENT BUT A NOTAM WAS ISSUED AFTER THE ACCIDENT.

## Aircraft

- Registration: [N7661A](https://openairdocs.org/aircraft/N7661A), registered now, S/N 32558, built 1956 (OpenAirDocs)
- Reported make and model: CESSNA 180
- Registry model: [Cessna 180](https://openairdocs.org/model/cessna-180) (registry code 2072602) (OpenAirDocs)
- Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 32558
- Airframe hours: 4150
- Engines: CONTINENTAL O-470K 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Miller, Mark D.
- Registered owner: Mark D Miller
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 5, 1988, 30 hours before
- Departed: HWQ, HARLOWTON, MT
- Airport: RPX, Roundup, runway 15, 2,800 × 100 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 32; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 680 total, 31 in this make and model, 650 as pilot in command, 50 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 50° at 5 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 5 °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).

- [Accident 19880210005269A](https://openairdocs.org/incident/19880210005269A), Feb 10, 1988: Cessna 180, Roundup, MT, Substantial damage. Pilot landed on runway that was covered by 1 foot of snow. Landing gear sank into deep snow. Aircraft nosed over.

## Other investigations on N7661A (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 FTW68F0528](https://openairdocs.org/ntsb/FTW68F0528), Apr 5, 1968: Cessna 180 (N7661A), Dallas, TX, 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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