# NTSB ANC88LA095: Cessna 207A, N1773U, Kongiganak, AK, July 23, 1988

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: July 23, 1988, 10:05 local (18:05 UTC)
- Place: Kongiganak, AK
- Coordinates: 58.819808, -157.859375 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.8198&lon=-157.8594&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 3 minor, 2 uninjured
- Status: Completed, report April 14, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5038
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88LA095
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5038/pdf
- Page: https://openairdocs.org/ntsb/ANC88LA095

## Sequence of events

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

- Loss of control - on ground/water, landing - flare/touchdown
  - planned approach - poor, pilot in command (cause)
  - go-around - not performed, pilot in command (cause)
  - terrain condition - rough/uneven (contributing factor)
  - proper touchdown point - improper, pilot in command (cause)
  - other airport/runway maintenance - not performed (contributing factor)
- Overrun, landing - roll
- Nose over, landing - roll

## Analysis

THE AIRCRAFT TOUCHED DOWN APPROXIMATELY 2/3 OF THE WAY DOWN THE RUNWAY. DURING THE LDG ROLL, AIRCRAFT HIT A RUT ON THE RUNWAY. THE PLANE NOSED OVER AND CAME TO REST ON ITS BACK, OFF THE DEPARTURE END OF THE RWY. THE FAA FLT INFO PUBLICATION STATES THAT THIS ARPT'S RWY IS UNUSABLE AFTER HEAVY RAIN AND SHOULD BE INSPECTED PRIOR TO USE. THE AIRPORT IS NOT ATTENDED.

## Aircraft

- Registration: [N1773U](https://openairdocs.org/deregistered/N1773U-2013-04-11), registration cancelled 2013-04-11, S/N 20700373, built 1976 (OpenAirDocs)
- Reported make and model: CESSNA 207A
- Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (registry code 2073604) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 20700373
- Airframe hours: 5186
- Engines: CONTINENTAL IO-520 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Armstrong Air Serv., doing business as Armstrong Air Service, Inc.
- Registered owner: Richard & Joann Armstrong
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, July 21, 1988, 10 hours before
- Departed: KNW, NEW STUYAHOK, AK
- Flight plan: Company VFR
- Airport: K6K, Kongiganak, Ak

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 2,000 total, 300 in this make and model, 1,800 as pilot in command, 375 in the last 90 days, 125 in the last 30 days, 12 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 40 statute miles
- Lowest ceiling: 2,000 ft broken
- Temperature: 55 °F, dew point 50 °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 19880723027519A](https://openairdocs.org/incident/19880723027519A), Jul 23, 1988: Cessna 207A, Koliganek, AK, Substantial damage. Landed on last third of the runway. Struck a rut and flipped over. Heavy braking a factor. Unimproved state strip.

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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