# NTSB DEN86FA137: Beech BE-99C, N6728J, Laramie, WY, May 16, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: May 16, 1986, 10:42 local (16:42 UTC)
- Place: Laramie, WY
- Coordinates: 41.309967, -105.580726 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.3100&lon=-105.5807&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 9 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16821
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN86FA137
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16821/pdf
- Page: https://openairdocs.org/ntsb/DEN86FA137

## Sequence of events

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

- In flight encounter with weather, climb - to cruise
  - weather condition - icing conditions (cause)
  - weather condition - snow (contributing factor)
- Loss of control - in flight, landing - flare/touchdown
  - airspeed - uncontrolled, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
- On ground/water collision with object, landing - roll
  - object - approach light/navaid
- Main gear collapsed, landing - roll
  - landing gear,main gear - overload

## Analysis

THIS PART 135 IFR FLT WAS INBOUND FOR LANDING AT LARAMIE, WYOMING. DURING THE EN ROUTE AND APPROACH FOR LDG PORTIONS OF THE FLT THE ACFT PICKED UP A MODERATE TO HEAVY LOAD OF ICE. DURING THE LANDING FLARE THE ACFT STALLED, HIT THE RWY, BOUNCED, VEERED OFF THE RWY, AND STRUCK A VASI LIGHTING SYSTEM. THE LEFT LDG GEAR COLLAPSED AND THE ACFT SKIDDED TO A STOP.

## Aircraft

- Registration: [N6728J](https://openairdocs.org/deregistered/N6728J-2013-03-26), registration cancelled 2013-03-26, S/N U-217, built 1983 (OpenAirDocs)
- Reported make and model: BEECH BE-99C
- Registry model: [Beech C-99](https://openairdocs.org/model/beech-c-99) (registry code 1154006) (OpenAirDocs)
- Registry engine: [Pratt & Whitney Canada PT6A-60A](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-60a) (registry code 52043, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: U-217
- Airframe hours: 5008
- Engines: P&W PT6A-36 680 horsepower turbo prop
- Damage: Substantial damage
- Flight: Part 135
- Operator: Centennial Airlines, Inc
- Registered owner: Beechcraft Accept. Corp. Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, May 10, 1986, 41 hours before
- Departed: DEN, DENVER, CO
- Destination: LAR, LARAMIE, WY
- Flight plan: IFR
- Airport: LAR, General Brees Field Arpt, runway 30, 6,300 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 2,530 total, 1,809 in this make and model, 1,350 as pilot in command, 284 in the last 90 days, 8 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 40° at 10 knots
- Visibility: 5 statute miles
- Lowest ceiling: 400 ft
- Temperature: 34 °F, dew point 34 °F
- Altimeter: 30.00 inHg
- Observed at: LAR, 75 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 19860516082199A](https://openairdocs.org/incident/19860516082199A), May 16, 1986: Beech C99, Laramie, WY, Substantial damage. Departed side of the runway after a hard landing. Accumulation of airframe ice and low approach are factors.

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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