# NTSB ANC92LA123: Beech C99, N216CS, Nuiqsut, AK, August 9, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 8, 1992, 17:30 local (Aug 9, 1992, 01:30 UTC)
- Place: Nuiqsut, AK
- Coordinates: 69.830375, -152.140151 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=69.8304&lon=-152.1402&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report August 26, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5770
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC92LA123
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5770/pdf
- Page: https://openairdocs.org/ntsb/ANC92LA123

## Probable cause

THE PILOT'S IMPROPER INFLIGHT PLANNING/PREPARATION, AND HIS FAILURE TO ATTAIN THE PROPER TOUCHDOWN POINT. CONTRIBUTING TO THE ACCIDENT WAS THE DOWNDRAFT.

## Sequence of events

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

- Undershoot, approach - vfr pattern - final approach
  - weather condition - downdraft (contributing factor)
  - proper touchdown point - not attained, pilot in command (cause)
  - in-flight planning/decision - improper, pilot in command (cause)
- Complete gear collapsed, landing - flare/touchdown
  - landing gear - overload

## Analysis

BOTH PILOTS REPORTED THAT THEY ENCOUNTERED A DOWNDRAFT DURING THE FINAL APPROACH WHICH CAUSED THE AIRPLANE TO DEVELOP A HIGHER THAN DESIRED SINK RATE.  THE APPLICATION OF POWER FAILED TO ARREST THE SINK RATE BEFORE THE AIRPLANE TOUCHED DOWN APPROXIMATELY ONE FOOT SHORT OF THE RUNWAY.  THE AIRPLANE CAME TO A STOP ABOUT 1,000 FEET DOWN THE RUNWAY, WITH ALL THREE LANDING GEAR COLLAPSED.  THE PILOT SAID THAT HE HAD ENCOUNTERED LIGHT TO MODERATE TURBULENCE DURING THE APPROACH, AND HE WAS 'SHOOTING FOR THE END OF THE RUNWAY'.

## Aircraft

- Registration: [N216CS](https://openairdocs.org/aircraft/N216CS), registered now, S/N U-216, built 1983 (OpenAirDocs)
- Reported make and model: BEECH C99
- Registry model: [Beech C-99](https://openairdocs.org/model/beech-c-99) (registry code 1154006) (OpenAirDocs)
- Registry engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52032, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: U-216
- Airframe hours: 8953
- Engines: P&W PT6A-36 715 horsepower turbo prop
- Damage: Substantial damage
- Flight: Part 135
- Operator: Cape Smythe Air Services, Inc.
- Registered owner: Cape Smythe Air Services, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, July 15, 1992, 71 hours before
- Departed: BRW, BARROW, AK
- Flight plan: VFR
- Airport: 10AK, Nuiqsut, runway 22, 4,600 × 150 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; commercial, flight engineer, airline transport, flight instructor; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 6,970 total, 370 in this make and model, 5,995 as pilot in command, 385 in the last 90 days, 130 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 12 knots
- Visibility: 15 statute miles
- Temperature: 45 °F
- Observed at: 10AK, 1 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 19920808029679A](https://openairdocs.org/incident/19920808029679A), Aug 8, 1992: Beech C99, Nuiqsut, AK, Substantial damage. Struck raised lip of runway landing short collapsing all three main gears. Blamed severe downdraft on short final.

## Other investigations on N216CS (2)

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 CEN17LA123](https://openairdocs.org/ntsb/CEN17LA123), Jan 24, 2017: Beech C 99 (N216CS), Durango, CO, substantial damage. Probable cause: The pilot's inability to maintain directional control during takeoff in crosswind conditions on a contaminated runway, which resulted in a runway excursion.
- [NTSB ANC96LA076](https://openairdocs.org/ntsb/ANC96LA076), May 21, 1996: Beech 99C (N216CS), Barrow, AK, substantial damage. Probable cause: an in-flight collision with a bird.

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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