# NTSB ANC83LA132: Cessna A185E, N4535F, Tyonek, AK, July 25, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 25, 1983, 13:00 local (21:00 UTC)
- Place: Tyonek, AK
- Coordinates: 61.080341, -151.159362 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.0803&lon=-151.1594&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4148
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC83LA132
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4148/pdf
- Page: https://openairdocs.org/ntsb/ANC83LA132

## Sequence of events

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

- On ground/water collision with object, takeoff - roll/run
  - terrain condition - sand bar (contributing factor)
  - preflight planning/preparation - poor, pilot in command (cause)
  - lack of familiarity with geographic area, pilot in command (cause)
  - visual lookout - not maintained, pilot in command (cause)
- Nose over, takeoff - roll/run

## Analysis

ACCORDING TO THE PILOT, DURING TAKEOFF AT ROTATION THE FLOATS STRUCK A SANDBAR. HE LOST CONTROL OF THE AIRCRAFT AND IT NOSED OVER IN THE WATER.

## Aircraft

- Registration: [N4535F](https://openairdocs.org/aircraft/N4535F), registered now, S/N 185-1021, built 1966 (OpenAirDocs)
- Reported make and model: CESSNA A185E
- Registry model: [Cessna A185E](https://openairdocs.org/model/cessna-a185e) (registry code 2072818) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 185-1021
- Engines: CONTINENTAL IO-520-D 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Executive Air Float Club
- Registered owner: Michael J. Lang
- Airworthiness certificate: Standard, Normal
- Destination: Z41, ANCHORAGE, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, expired; seat: left

## Weather

- Conditions: Visual (VMC), Day
- Wind: variable at 3 knots, gusting 5
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 57 °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 19830725035749A](https://openairdocs.org/incident/19830725035749A), Jul 25, 1983: Cessna A185E, Tyonek, AK, Substantial damage. Seaplane float struck sandbar during takeoff run causing aircraft to nose over onto river bank.

## Other investigations on N4535F (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 ANC98LA017](https://openairdocs.org/ntsb/ANC98LA017), Feb 24, 1998: Cessna 185E (N4535F), Anchorage, AK, substantial damage. Probable cause: A separation of the axle from the landing gear strut due to overload, and stripping of the axle bolt threads.

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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