# NTSB FTW84FA104: Beech 58, N9121S, Marquez, NM, December 27, 1983

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: December 27, 1983, 12:30 local (19:30 UTC)
- Place: Marquez, NM
- Coordinates: 35.149291, -107.830215 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.1493&lon=-107.8302&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 4 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21097
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW84FA104
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21097/pdf
- Page: https://openairdocs.org/ntsb/FTW84FA104

## Sequence of events

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

- In flight encounter with weather, cruise - normal
  - flight into known adverse weather - performed, pilot in command (cause)
  - weather condition - icing conditions (contributing factor)
  - in-flight planning/decision - improper, pilot in command (cause)
  - wing - ice (cause)
- Loss of control - in flight, climb
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE ACFT WAS FLOWN AT ALTITUDES UP TO 15000 FT IN AREAS OF FORECAST ICING. THE ACFT WAS NOT EQUIPPED WITH OXYGEN. THE ACFT WAS FLOWN ABOVE 14000 FT FOR ABOUT 20 MINUTES AFTER WHICH IT DESCENDED INTO ICING CONDITIONS. SHORTLY THEREAFTER, THE ACFT MADE A CLIMB UNDER ATC DIRECTIONS AND THEN RADAR SHOWED IT MAKING A RAPID DESCENT. THE PLT HAD TOLD THE CONTROLLER THAT THE ACFT HAD PICKED UP ABOUT 1/2 INCH OF RIME ICE. RADAR CONTACT WAS LOST SHORTLY AFTER A READOUT AT 10400 FT. FURTHER ATTEMPTS AT COMMUNICATIONS FAILED. LATER, THE ACFT WAS FOUND WHERE IT HAD CRASHED IN A STEEP, VERTICALLY BANKED DIVE AT A HIGH RATE OF SPEED. RIME ICE WAS FOUND IN THE SNOW NEXT TO THE ELEVATOR COUNTERWEIGHT. THE ELEVATOR TRIM WAS FOUND TRIMMED TO A NOSE-UP POSITION. THE ACFT WAS EQUIPPED WITH DEICING/ANTI-ICING EQUIPMENT & AN AUTOPILOT.

## Aircraft

- Registration: [N9121S](https://openairdocs.org/deregistered/N9121S-2012-11-19), registration cancelled 2012-11-19, S/N TH-783, built 1976 (OpenAirDocs)
- Reported make and model: BEECH 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (registry code 1152740) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: TH-783
- Engines: CONTINENTAL IO-520-C 285 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Charles F. Mccool,Frey Ass.Inc
- Registered owner: Charles J. Volpe
- Airworthiness certificate: Standard, Normal
- Departed: PUB, PUEBLO,, CO
- Destination: PRC, PRESCOTT, AZ
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 1,313 total, 26 in this make and model, 1,263 as pilot in command, 28 in the last 90 days, 26 in the last 30 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 290° at 16 knots
- Visibility: 50 statute miles
- Lowest ceiling: 5,000 ft broken
- Temperature: 52 °F, dew point 37 °F
- Altimeter: 29.00 inHg
- Observed at: ABQ, 41 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 19831227063379A](https://openairdocs.org/incident/19831227063379A), Dec 27, 1983: Beech 58, Marquez, NM, Destroyed, 3 fatal. Report indicates pilot exposed to hypoxia due to altitude, lost an engine, had airframe icing, lost control,spun in

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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