# NTSB DEN84LA291: Cessna 172P, N6579K, Longmont, CO, September 16, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 16, 1984, 11:00 local (17:00 UTC)
- Place: Longmont, CO
- Coordinates: 40.169395, -105.109916 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.1694&lon=-105.1099&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16486
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN84LA291
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16486/pdf
- Page: https://openairdocs.org/ntsb/DEN84LA291

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, maneuvering
  - fuel system,carburetor - ice (contributing factor)
  - carburetor heat - improper use of, pilot in command (cause)
  - weather condition - carburetor icing conditions (contributing factor)
  - procedures/directives - not followed, pilot in command (cause)
- Forced landing, descent - emergency
- Hard landing, landing - roll
  - terrain condition - wet (contributing factor)
- Nose over, landing - roll

## Analysis

THE PLT WAS MAKING A LOW PASS OVER A STRIP HE WANTED CERTIFIED. DURING AN ATTEMPTED GO-AROUND THE ENG WOULD NOT RESPOND SO THE PLT LANDED. THE ACFT RAN OFF THE END OF THE WET SOD AIRSTRIP AND NOSED OVER. THE PLT SAID AFTER THE ACCIDENT THAT THE CARBURETOR HEAT HAD NOT BEEN USEDD IN THE LAST 10 MINUTES OF FLT. THE ENGINE WAS TESTED BY THE FAA AFTER THE ACCIDENT AND IT OPERATED NORMALLY.

## Aircraft

- Registration: [N6579K](https://openairdocs.org/deregistered/N6579K-2023-06-26), registration cancelled 2023-06-26, S/N 17274216 (OpenAirDocs)
- Reported make and model: CESSNA 172P
- Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (registry code 2072436) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17274216
- Airframe hours: 1692
- Engines: LYCOMING O-320-H2AD 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Judson Aviation
- Registered owner: Roger Sebelius
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, July 12, 1984
- Airport: runway 18, 1,600 × 50 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; airline transport; airplane ratings: single-engine land; instrument ratings: airplane; medical: valid medical--w/ waivers/lim; seat: left; flight hours: 12,500 total, 100 in this make and model, 12,500 as pilot in command, 150 in the last 90 days, 130 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: 6,000 ft broken
- Temperature: 55 °F, dew point 48 °F
- Altimeter: 30.00 inHg
- Observed at: BJC, 20 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 19840916050599A](https://openairdocs.org/incident/19840916050599A), Sep 16, 1984: Cessna 172P, Longmont, CO, Substantial damage. Engine failed to respond during low pass over airstrip, pilot attemtped to land on remaining runway. Ran off end.

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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