# NTSB ANC86LA083: Cessna 172M, N73419, Theodore River, AK, June 18, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 18, 1986, 06:30 local (14:30 UTC)
- Place: Theodore River, AK
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4681
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA083
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4681/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA083

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - terrain condition - loose gravel/sandy
  - terrain condition - rough/uneven
  - judgment - poor, pilot in command (contributing factor)
  - aircraft handling - not maintained, pilot in command (cause)
  - directional control - not maintained, pilot in command (cause)
- On ground/water encounter with terrain/water, takeoff - roll/run
  - terrain condition - sand bar

## Analysis

THE PILOT STATED THAT UPON ATTEMPTING A SOFT FIELD TAKEOFF THE AIRCRAFT DRIFTED TO THE LEFT. THE LEFT MAIN LANDING GEAR STRUCK A SAND BERM WHICH CAUSED THE AIRCRAFT TO EXIT THE ROAD INTO AN OPEN DITCH.

## Aircraft

- Registration: [N73419](https://openairdocs.org/aircraft/N73419), registered now, S/N 17267443, built 1976 (OpenAirDocs)
- Reported make and model: CESSNA 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (registry code 2072418) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17267443
- Airframe hours: 4928
- Engines: LYCOMING O-320-E2D 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Aero Tech Flight Service Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, March 1, 1986, 75 hours before
- Destination: MRI, ANCHORAGE, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; commercial, flight instructor, airline transport; airplane ratings: single-engine sea, multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 1,863 total, 750 in this make and model, 1,653 as pilot in command, 330 in the last 90 days, 150 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Temperature: 55 °F, dew point 30 °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 19860618029559A](https://openairdocs.org/incident/19860618029559A), Jun 18, 1986: Cessna 172M, Theodore River, AK, Substantial damage. Allowed aircraft to veer to side of road on takeoff, struck a berm and bushes, aircraft ran into ditch. Nosed over.

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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