# NTSB DEN86FA120: Convair 580, N73104, Denver, CO, April 25, 1986

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: April 25, 1986, 10:00 local (17:00 UTC)
- Place: Denver, CO
- Coordinates: 39.739608, -104.859718 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.7396&lon=-104.8597&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 30 uninjured
- Status: Completed, report March 10, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 16817
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN86FA120
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16817/pdf
- Page: https://openairdocs.org/ntsb/DEN86FA120

## Sequence of events

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

- In flight encounter with weather, descent
  - weather condition - turbulence,clear air (cause)
  - remedial action - not possible, pilot in command
  - misc eqpt/furnishings,seat belt - not engaged
  - seat belt - not used, flight attendant (cause)

## Analysis

N73104 WAS OPERATING AS ASPEN AIRWAY FLT 416, SCHEDULED PAX SERVICE FROM ASPEN TO DENVER. THE FLT PROCEEDED UNEVENTFULLY UNTIL LIGHT TURB WAS ENCOUNTERD NEAR DENVER. THE CAPTAIN HAD AUTHORIZED THE FLT ATTENDANT TO PERFORM BEVERAGE SVC. AFTER COMPLETING THE SVC, THE FLT ATTENDANT WAS IN THE AFT GALLEY WHEN A MODERATE BUMP WAS ENCOUNTERED AT 16,000 FT. THE FLT ATTENDANT RECEIVED SERIOUS BACK INJURIES THAT LEFT HER INCAPACITATED THE REMAINDER OF THE FLT.

## Aircraft

- Registration: [N73104](https://openairdocs.org/deregistered/N73104-2010-12-01), registration cancelled 2010-12-01, S/N 4, built 1952 (OpenAirDocs)
- Reported make and model: CONVAIR 580
- Registry model: [Convair 340-31](https://openairdocs.org/model/convair-340-31) (registry code 2422804) (OpenAirDocs)
- Registry engine: [Allison 501-D13 series](https://openairdocs.org/engine/allison-501-d13-series) (registry code 03004, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: 4
- Engines: ALLISON 501-D13H 3750 horsepower turbo prop
- Damage: No damage
- Flight: Part 121
- Operator: Aspen Airway, Inc
- Registered owner: Aspen Airways, Inc
- Airworthiness certificate: Standard, Transport
- Departed: ASE, ASPEN, CO
- Destination: DEN, DENVER, CO
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; commercial, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 10,450 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 140° at 8 knots
- Visibility: 65 statute miles
- Lowest ceiling: none
- Temperature: 63 °F, dew point 19 °F
- Altimeter: 29.00 inHg
- Observed at: DEN, 20 nm away

## Other investigations on N73104 (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 UNK64X1647](https://openairdocs.org/ntsb/UNK64X1647), May 7, 1964: Convair 340 (N73104), Salt Lake City, UT, incident, minor 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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