# NTSB ANC83LA149: Cessna T-207A, N73789, Atmautluak, AK, August 19, 1983

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: August 19, 1983, 11:30 local (15:30 UTC)
- Place: Atmautluak, AK
- Coordinates: 60.810176, -161.850646 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=60.8102&lon=-161.8506&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 4 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4156
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC83LA149
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4156/pdf
- Page: https://openairdocs.org/ntsb/ANC83LA149

## 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
  - fuselage,seat - unlocked (contributing factor)
  - aircraft preflight - inadequate, pilot in command (cause)
  - aircraft handling - not possible, pilot in command (contributing factor)
  - ground loop/swerve - uncontrolled, pilot in command (contributing factor)
- On ground/water encounter with terrain/water, takeoff - roll/run

## Analysis

THE PLT STATED THAT DURING THE TAKEOFF ROLL, HIS SEAT SLID BACKWARDS & HE WAS UNABLE TO REACH THE CONTROLS. SUBSEQUENTLY, THE ACFT VEERED TO THE RIGHT, DEPARTED THE RWY & WENT INTO A SHALLOW POND. THE PLT REPORTED THAT THE SEAT LATCH MALFUNCTIONED & WAS APPARENTLY NOT SECURED BEFORE STARTING THE TAKEOFF, BUT NO BROKEN PARTS WERE FOUND.

## Aircraft

- Registration: [N73789](https://openairdocs.org/aircraft/N73789), registered now, S/N 20700629, built 1980 (OpenAirDocs)
- Reported make and model: CESSNA T-207A
- Registry model: [Cessna T207A](https://openairdocs.org/model/cessna-t207a) (registry code 2073615) (OpenAirDocs)
- Registry engine: [Continental TSIO-520-M](https://openairdocs.org/engine/continental-tsio-520-m) (registry code 17266, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 20700629
- Airframe hours: 20
- Engines: CONTINENTAL IO-420F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Coastal Aviation
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 10, 1983, 73 hours before
- Destination: BET, BETHEL, AK
- Flight plan: VFR
- Airport: 08AK, Atmautluak, runway 33, 2,200 × 40 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial; airplane ratings: single-engine land, multi-engine sea; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 4,838 total, 874 in this make and model, 4,764 as pilot in command, 260 in the last 90 days, 120 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 12 knots
- Visibility: 80 statute miles
- Lowest ceiling: 4,500 ft broken
- Temperature: 57 °F, dew point 46 °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 19830819043469A](https://openairdocs.org/incident/19830819043469A), Aug 19, 1983: Cessna T207A, Atmautlauk, AK, Substantial damage. Pilots seat slid back on takeoff. Control was lost. Veered off runway into a pond. Seat not fastened prior takeoff.

## Other investigations on N73789 (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 ANC11FA091](https://openairdocs.org/ntsb/ANC11FA091), Sep 2, 2011: Cessna T207A (N73789), Nightmute, AK, substantial damage, 1 fatal. Probable cause: The failure of the pilot of the other airplane to maintain adequate clearance while performing an unexpected and unannounced abrupt maneuver, resulting in a midair collision between the two airplanes.

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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