# NTSB ANC88LA016: Stinson 108-2, N9398K, Alexander Lake, AK, October 25, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 25, 1987, 14:30 local (18:30 UTC)
- Place: Alexander Lake, AK
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 14, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4975
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88LA016
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4975/pdf
- Page: https://openairdocs.org/ntsb/ANC88LA016

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - weather condition - tailwind (contributing factor)
  - aircraft handling - inadequate, pilot in command (cause)
  - ground loop/swerve - uncontrolled, pilot in command (cause)
  - terrain condition - water,rough (contributing factor)
  - planning/decision - poor, pilot in command (cause)

## Analysis

THE RELATIVELY INEXPERIENCED PRIVATE PILOT ATTEMPTED TO LAND HIS FLOAT EQUIPPED AIRPLANE WITH A TAILWIND AND GUSTY WINDS IN CHOPPY WATER CONDITIONS. HE LOST CONTROL OF THE AIRPLANE AND IT WAS SUBSTANTIALLY DAMAGED.

## Aircraft

- Registration: [N9398K](https://openairdocs.org/deregistered/N9398K-2013-05-22), registration cancelled 2013-05-22, S/N 108-2398, built 1947 (OpenAirDocs)
- Reported make and model: STINSON 108-2
- Registry model: [Stinson 108](https://openairdocs.org/model/stinson-108) (registry code 9230402) (OpenAirDocs)
- Registry engine: [Franklin 6A4165 series](https://openairdocs.org/engine/franklin-6a4165-series) (registry code 27025, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1082398
- Airframe hours: 2364
- Engines: CONTINENTAL O-470K 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Reinhard A. Grenz
- Registered owner: Reinhard Albrecht Grenz
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 25, 1987, 89 hours before
- Departed: ANDERSON LAKE, AK
- Destination: AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; private; airplane ratings: single-engine land, single-engine sea; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 288 total, 18 in this make and model, 118 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 10 knots, gusting 15
- Visibility: 30 statute miles
- Lowest ceiling: 3,000 ft broken
- Temperature: 37 °F, dew point -0 °F
- Altimeter: 29.00 inHg

## 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 19871025061089A](https://openairdocs.org/incident/19871025061089A), Oct 25, 1987: Univar 108, Alexander Lake, AK, Substantial damage. Attempted downwind lake landing. Lost control after landing while on step wing. Hit water and turned upside down.

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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