# NTSB ANC88LA151: Cessna U206F, N401SU, Lake Minchumina, AK, July 25, 1988

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Limited investigation · Final report
- Date: July 25, 1988, 13:00 local (21:00 UTC)
- Place: Lake Minchumina, AK
- Coordinates: 63.809036, -152.250991 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=63.8090&lon=-152.2510&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious, 2 uninjured
- Status: Completed, report July 3, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5092
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88LA151
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5092/pdf
- Page: https://openairdocs.org/ntsb/ANC88LA151

## Sequence of events

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

- Nose over, taxi
  - aircraft preflight - not performed, pilot in command (cause)
  - weather condition - high wind (contributing factor)
  - terrain condition - water,rough (contributing factor)
  - landing gear,float assembly - open (cause)

## Analysis

THE PLT SAID HE WAS TAXIING THE FLOATPLANE FROM A WINDY/WAVY LOCATION TO A SMALL PROTECTED COVE FOR A FINAL PREFLT. WHILE TAXIING, THE TOP CAP OF THE LEFT FLOAT WAS OPEN & THE FLOAT BEGAN FILLING WITH WATER. SUBSEQUENTLY, THE FLOAT- PLANE ROLLED OVER & SANK.

## Aircraft

- Registration: [N401SU](https://openairdocs.org/aircraft/N401SU), registered now, S/N U20602932, built 1975 (OpenAirDocs)
- Reported make and model: CESSNA U206F
- Registry model: [Cessna U206F](https://openairdocs.org/model/cessna-u206f) (registry code 2073333) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: U20602932
- Airframe hours: 2000
- Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Hayden, Jack
- Registered owner: Robert C Hronek
- Airworthiness certificate: Standard, Utility

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 3,178 total, 800 in this make and model, 3,078 as pilot in command, 100 in the last 90 days, 50 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 20 knots, gusting 31
- Visibility: 20 statute miles
- Lowest ceiling: 8,000 ft broken
- Temperature: 55 °F

## 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 19880725057329A](https://openairdocs.org/incident/19880725057329A), Jul 25, 1988: Cessna U206F, Lake Minchumina, AK, Substantial damage, 1 fatal. Water taxi to refuel prior to takeoff. Water rough. Left float cap open shipped water and acft rolled over and sank

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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