# NTSB ANC87LA054: Cessna 170B, N3439D, Dillingham, AK, March 19, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 19, 1987, 15:20 local (19:20 UTC)
- Place: Dillingham, AK
- Coordinates: 58.820346, -157.860855 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.8203&lon=-157.8609&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 7, 1988
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4836
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87LA054
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4836/pdf
- Page: https://openairdocs.org/ntsb/ANC87LA054

## Sequence of events

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

- On ground/water encounter with terrain/water, takeoff - roll/run
  - judgment - poor, pilot in command (cause)
  - impairment(alcohol), pilot in command (cause)
  - qualification, pilot in command
  - planning/decision - improper, pilot in command (cause)
  - terrain condition - snowbank (contributing factor)
  - clearance - not attained

## Analysis

AS THE PLT WAS TAKING OFF FROM A FROZEN LAKE WITH A SKI EQUIPPED ACFT, IT COLLIDED WITH A SNOWBANK & WAS DAMAGED. THE PLT RPRTD THAT HE HAD JUST LANDED A FEW MINUTES EARLIER & THAT THE WIND WAS BLOWING DIFFERENTLY WHEN HE TOOK OFF AGAIN. AFTER THE ACDNT, POLICE PERSONNEL NOTED THAT THE PLT HAD AN ODOR OF ALCOHOL ON HIS BREATH, AS WELL AS SLURRED SPEECH & SOME DIFFICULTY IN WALKING. WHEN HIS BREATH WAS CHECKED WITH AN INTOXIMETER 3000 TEST MACHINE, IT SHOWED AN ALCOHOL LVL THAT WAS EQUIVALENT TO 0.123% BAC. THE PLTS LAST FAA MEDICAL EXAM WAS ON 10/13/78; HIS LAST BFR DATE WASN'T ESTABLISHED.

## Aircraft

- Registration: [N3439D](https://openairdocs.org/aircraft/N3439D), registered now, S/N 26982 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series) (registry code 17022, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 26982
- Engines: CONTINENTAL O-300-D 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: William R. Ingram
- Airworthiness certificate: Standard, Normal
- Airport: 0Z3, Shannons Pond

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; commercial; airplane ratings: single-engine land, single-engine sea; medical: class 2, expired; seat: left; toxicology performed; flight hours: 1,200 total, 700 in this make and model, 1,100 as pilot in command, 50 in the last 90 days, 10 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 8 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 30 °F, dew point 18 °F
- Altimeter: 29.00 inHg

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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