# NTSB ANC88LA136: Cessna 207, N6470H, Bethel, AK, September 10, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 9, 1988, 21:58 local (Sep 10, 1988, 05:58 UTC)
- Place: Bethel, AK
- Coordinates: 60.809986, -161.849029 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=60.8100&lon=-161.8490&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report August 8, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5077
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88LA136
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5077/pdf
- Page: https://openairdocs.org/ntsb/ANC88LA136

## Sequence of events

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

- Overrun, takeoff - roll/run
  - flight control,gust lock - engaged (cause)
  - preflight planning/preparation - inadequate, pilot in command (cause)
  - removal of control/gust lock(s) - not performed, pilot in command (cause)
  - aborted takeoff - delayed, pilot in command (cause)
  - light condition - dark night
- Nose over, takeoff - roll/run

## Analysis

THE PILOT WAS AN AIRCRAFT MECHANIC FOR THE OPERATOR OF THE AIRPLANE, AND WAS ENROUTE TO ANOTHER AIRPORT TO REPAIR A COMPANY AIRPLANE. THE PILOT STATED THAT HE DID NOT DO A COMPLETE JOB OF PREFLIGHTING THE AIRPLANE, AND ATTEMPTED TO TAKEOFF WITH THE CONTROL WHEEL LOCK (A NAIL) STILL IN PLACE. HE TRIED UNSUCCESSFULLY TO REMOVE THE NAIL, AND THEN TRIED TO ABORT THE TAKEOFF, BUT WAS UNABLE TO STOP THE AIRPLANE BEFORE IT RAN OFF THE END OF THE RUNWAY AND NOSED OVER.

## Aircraft

- Registration: [N6470H](https://openairdocs.org/aircraft/N6470H), registered now, S/N 20700534, built 1979 (OpenAirDocs)
- Reported make and model: CESSNA 207
- 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: 20700534
- Engines: CONTINENTAL IO-520-F13B 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Yute Air Alaska
- Registered owner: Yute Air Alaska
- Airworthiness certificate: Standard, Normal
- Destination: AK85, KWIGILLINOK, AK
- Airport: BET, Bethel, runway 36, 6,399 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 1,107 total, 4 in this make and model, 796 as pilot in command, 19 in the last 90 days, 11 in the last 30 days

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 30° at 16 knots, gusting 22
- Visibility: 20 statute miles
- Lowest ceiling: 10,000 ft overcast
- Temperature: 48 °F, dew point 39 °F
- Altimeter: 29.00 inHg
- Observed at: TWR

## 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 19880909038109A](https://openairdocs.org/incident/19880909038109A), Sep 9, 1988: Cessna 207, Bethel, AK, Substantial damage. Began takeoff roll with control lock in place. Unable to remove, aborted late, ran off end of runway and overturned

## Other investigations on N6470H (3)

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 ANC07LA014](https://openairdocs.org/ntsb/ANC07LA014), Jan 7, 2007: Cessna 207 (N6470H), Kipnuk, AK, substantial damage. Probable cause: The pilot's failure to maintain adequate clearance from terrain during the landing roll, which resulted in a collision with a snow berm with the left main landing gear, and subsequent damage to the…
- [NTSB ANC94LA031](https://openairdocs.org/ntsb/ANC94LA031), Feb 8, 1994: Cessna 207 (N6470H), Kwigillingok, AK, substantial damage. Probable cause: THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN THE PROPER AIRSPEED WHICH RESULTED IN AN INADVERTENT STALL AND HIS FAILURE TO INITIATE A GO-AROUND WHEN THE RUNWAY ENVIRONMENT WAS NOT CLEARLY DEFINED. A…
- [NTSB ANC83IA060](https://openairdocs.org/ntsb/ANC83IA060), Mar 28, 1983: Cessna C-207A (N6470H), Eek, AK, incident, minor damage

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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