# NTSB ANC82FA091: Robertson C-U206F, N33249, Near Nondalton, AK, September 17, 1982

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: September 17, 1982, 09:30 local (17:30 UTC)
- Place: Near Nondalton, AK
- Coordinates: 59.960796, -154.870559 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=59.9608&lon=-154.8706&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 4 fatal, 1 serious
- Status: Completed, report September 17, 1983
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 71904
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC82FA091
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/71904/pdf
- Page: https://openairdocs.org/ntsb/ANC82FA091

## Sequence of events

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

- Loss of control - in flight, takeoff - initial climb
  - weather condition - crosswind (contributing factor)
  - weather condition - gusts (contributing factor)
  - weather condition - high wind (contributing factor)
  - weather condition - rain (contributing factor)
  - weather condition - turbulence (contributing factor)
  - weather condition - unfavorable wind (contributing factor)
  - weather condition - windshear (contributing factor)
  - terrain condition - water,rough (contributing factor)
  - judgment - poor, pilot in command (cause)
- In flight collision with terrain/water, takeoff - initial climb
- Nose over, takeoff - initial climb
  - passenger briefing - not performed, pilot in command (contributing factor)
  - emergency equipment - not used, passenger (contributing factor)

## Analysis

SHORTLY AFTER TAKEOFF FROM HUDSON LAKE THE LEFT WINGTIP CONTACTED THE WATER CAUSING THE ACFT TO CARTWHEEL. THE ACFT CAME TO REST INVERTED & FLOATED FOR A SHORT TIME BEFORE SINKING. A WITNESS REPORTED THE WAVES ON THE LAKE WERE AT LEAST 4 FT HIGH & BREAKING OVER THE FLOATS, & THE WX WAS THE WORST HE HAS SEEN SINCE ARRIVING IN LATE MAY OF 1982. THE WITNESS REITERATED GALE FORCE WINDS & HEAVY RAIN. HE ALSO STATED THE WAVES IN THE COVE WHERE THE TAKEOFF STARTED WERE OPPOSITE TO THE DIRECTION OF TAKEOFF & THE WAVES WERE NOT A TRUE INDICATION OF THE WIND DIRECTION. THE WAVES WERE ALMOST 90 DEG DIFFERENT THAN THE WAVES IN THE CENTER OF THE LAKE. HE SAID IT WAS DIFFICULT TO TELL WHEN THE ACFT GOT ON STEP BECAUSE IT WAS BOUNCING AROUND BADLY & THE WATER WAS HITTING THE STRUTS. THE ONLY PERSON HE COULD SEE WEARING ANY FLOTATION DEVICE WAS THE PLT. ALL THE LIFE VESTS WERE LOCATED UNDER EACH PASSENGER SEAT SECURED IN A POUCH BY METAL TWISTS FASTENERS.

## Aircraft

- Registration: [N33249](https://openairdocs.org/deregistered/N33249-1989-03-14), registration cancelled 1989-03-14, S/N U20602694 (OpenAirDocs)
- Reported make and model: ROBERTSON C-U206F
- Registry model: [Cessna U206F](https://openairdocs.org/model/cessna-u206f) (registry code 2073333) (OpenAirDocs)
- Category: Airplane
- Serial number: U20602694
- Airframe hours: 1428
- Engines: CONTINENTAL IO-520 300 horsepower reciprocating
- Damage: Destroyed
- Flight: Part 135
- Operator: Lake Clark Flying Service
- Registered owner: Tikchik Lodge
- Departed: NEAR NONDALTON, AK
- Destination: Z30, PORT ALSWORTH, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land, multi-engine sea, single-engine sea; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 2,863 total, 81 in this make and model, 2,567 as pilot in command, 348 in the last 90 days, 104 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 100° at 23 knots
- Visibility: 25 statute miles
- Lowest ceiling: 6,000 ft overcast
- Temperature: 120 °F
- Altimeter: 29.00 inHg
- Observed at: ILI

## 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 19820917047599A](https://openairdocs.org/incident/19820917047599A), Sep 17, 1982: Cessna U206F, Nondalton, AK, Destroyed, 3 fatal. Aircraft crashed during takeoff from lake when wing dug into water causing it to cartwheel.

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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