# NTSB DEN85FA017: Cessna 414, N1569T, Cheyenne, WY, October 23, 1984

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: October 23, 1984, 10:16 local (16:16 UTC)
- Place: Cheyenne, WY
- Coordinates: 41.140125, -104.789558 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.1401&lon=-104.7896&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16510
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN85FA017
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16510/pdf
- Page: https://openairdocs.org/ntsb/DEN85FA017

## Sequence of events

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

- In flight encounter with weather, circling (ifr)
  - weather condition - icing conditions (contributing factor)
  - in-flight planning/decision - improper, pilot in command (contributing factor)
- Abrupt maneuver, approach
  - in-flight planning/decision - improper, pilot in command (contributing factor)
  - proper descent rate - not performed, pilot in command (contributing factor)
  - judgment - poor, pilot in command (contributing factor)
- Loss of control - in flight, descent - uncontrolled
  - flight control surfaces/attachments - ice (contributing factor)
  - airspeed - not maintained, pilot in command (cause)
  - altitude - not maintained, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE ACFT COLLIDED WITH THE GROUND DURING A TURN TO FINAL FROM A CIRCLING APPROACH (IFR) AT CHEYENNE AIRPORT. ACCORDING TO ATC, THE ACFT WAS A VFR 'POP UP' & WAS SUBSEQUENTLY ISSUED AN IFR CLEARANCE FOR AN APPROACH INTO THE AIRPORT. EXAMINATION OF THE ACFT AT THE WRECKAGE SITE REVEALED A BUILD-UP OF MIXED RIME & CLEAR ICE ON THE ENG.

## Aircraft

- Registration: [N1569T](https://openairdocs.org/deregistered/N1569T-2012-07-09), registration cancelled 2012-07-09, S/N 414-0478, built 1973 (OpenAirDocs)
- Reported make and model: CESSNA 414
- Registry model: [Cessna 414](https://openairdocs.org/model/cessna-414) (registry code 2075908) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 414-0478
- Airframe hours: 6200
- Engines: LYCOMING TSIO-520NBCJ 310 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: Medicla Air Rescue Co. Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 17, 1984, 14 hours before
- Departed: RAP, RAPID CITY, SD
- Destination: CYS, CHEYENNE, WY
- Flight plan: VFR
- Airport: CYS, Cheyenne, runway 34, 4,997 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 2,838 total, 28 in this make and model, 235 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 140° at 8 knots
- Visibility: 1 statute miles
- Lowest ceiling: 300 ft broken
- Temperature: 28 °F, dew point 30 °F
- Altimeter: 30.00 inHg
- Observed at: CYS

## 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 19841023061659A](https://openairdocs.org/incident/19841023061659A), Oct 23, 1984: Cessna STC414, Cheyenne, WY, Substantial damage. Impacted ground after stalling during steep banked circling approach. Managed to level wings before impact.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.