# NTSB ANC07LA014: Cessna 207, N6470H, Kipnuk, AK, January 7, 2007 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: January 7, 2007, 19:30 local (23:30 UTC) - Place: Kipnuk, AK - Coordinates: 59.933055, -164.030548 - Nearby events: https://openairdocs.org/map.md?lat=59.9331&lon=-164.0305&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 5 uninjured - Status: Completed, report May 29, 2007 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: FAA-AL-ANC FSDO 03 - NTSB case key (mKey): 65167 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC07LA014 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/65167/pdf - Page: https://openairdocs.org/ntsb/ANC07LA014 ## 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 right wing. Factors contributing to the accident were dark night lighting conditions, and a snow berm along the edge of the runway. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water encounter with terrain/water, landing - roll - terrain condition - berm (contributing factor) - clearance - not maintained, pilot in command (cause) - light condition - dark night (contributing factor) ## Analysis The commercial certificated pilot was conducting a VFR, Title 14, CFR Part 135, scheduled commuter flight, and was landing on a remote runway during dark night conditions. During the landing roll, the left main landing gear tire struck a snow berm located inside the runway edge lights, along the left edge of the runway, pivoting the airplane to the left. The right wing then struck snow-covered terrain, and received structural damage to the outboard end of the wing. ## Factual narrative On January 7, 2007, about 1930 Alaska Standard time, a wheel-equipped Cessna 207 airplane, N6470H, sustained substantial damage during the landing roll at the Kipnuk Airport, Kipnuk, Alaska. The airplane was being operated as Flight 585, by Flight Alaska Inc., d.b.a. Yute Air Alaska, as a visual flight rules (VFR) cross-country scheduled commuter flight, under Title 14, CFR Part 135, when the accident occurred. The commercial certificated pilot and the four passengers were not injured. Dark night visual meteorological conditions prevailed, and VFR company flight following procedures were in effect. The flight originated at the Chefornak Airport, Chefornak, Alaska, about 1915. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on January 7, the director of operations for the operator reported that the pilot was landing on runway 33 at Kipnuk. The runway is 2,120 feet long, and 35 feet wide. The left main landing gear tire struck a snow berm along the left edge of the runway, and the airplane pivoted to the left. The right wing then struck snow-covered terrain. In the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) submitted by the operator, the pilot reported that the snow berm on the runway was inside of the runway edge lights. The Federal Aviation Administration's (FAA) Airport/Facility Directory, Alaska Supplement listing for the Kipnuk Airport, includes the following notation: "Airport Remarks - Unattended. Caution: Runway condition not monitored, recommend visual inspection prior to using." On January 19, the director of operations confirmed that the right wing of the airplane received structural damage to the outboard end of the wing. ## 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 - Airframe hours: 25267 - Engines: Continental IO-520-F 300 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Operator: Flight Alaska Inc., doing business as Yute Air Alaska - Registered owner: Maritime Sales and Leasing - Airworthiness certificate: Standard, Normal - Departed: PACK, Chefornak, AK - Destination: PAKI, Kipnuk, AK - Flight plan: Company VFR - Airport: PAKI, Kipnuk, runway 33, 2,120 × 35 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 64; injuries: none; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review August 1, 2006; seat: left; flight hours: 3,000 total, 2,000 in this make and model, 3,000 as pilot in command, 200 in the last 90 days, 70 in the last 30 days, 5 in the last 24 hours ## Weather - Conditions: Visual (VMC), Night/dark - Visibility: 5 statute miles - Lowest ceiling: 4,000 ft - Temperature: -20 °F ## 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 20070107000399A](https://openairdocs.org/incident/20070107000399A), Jan 7, 2007: Cessna 207A, Akiak, AK, Substantial damage. (-23) The pilot stated that he flew a high, steep final approach path to a night landing at kipnuk, AK airport. He intended to land on a slight rise at the… ## 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 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 ANC88LA136](https://openairdocs.org/ntsb/ANC88LA136), Sep 10, 1988: Cessna 207 (N6470H), Bethel, AK, substantial damage - [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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.