# NTSB ANC94LA031: Cessna 207, N6470H, Kwigillingok, AK, February 8, 1994 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: February 8, 1994, 17:00 local (21:00 UTC) - Place: Kwigillingok, AK - Coordinates: 59.870769, -163.179077 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=59.8708&lon=-163.1791&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 6 uninjured - Status: Completed, report January 12, 1995 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 2484 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC94LA031 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/2484/pdf - Page: https://openairdocs.org/ntsb/ANC94LA031 ## 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 FACTOR IN THE ACCIDENT WAS THE FOG. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight encounter with weather, approach - vfr pattern - final approach - weather condition - fog (contributing factor) - Loss of control - in flight, approach - vfr pattern - final approach - airspeed - not maintained, pilot in command (cause) - stall - inadvertent, pilot in command (cause) - go-around - not performed, pilot in command (cause) - In flight collision with terrain/water, descent - uncontrolled ## Analysis THE PILOT OF A SCHEDULED PART 135 COMMUTER FLIGHT WAS ATTEMPTING TO LAND AT A FOG SHROUDED AIRPORT ON A 2500 X 25 FT RUNWAY. WHEN THE PILOT VISUALLY ACQUIRED THE RUNWAY, IT WAS 100 FEET TO HIS LEFT. THE PILOT INADVERTENTLY STALLED THE AIRPLANE WHILE ATTEMPTING TO ALIGN THE PLANE WITH THE RUNWAY. ## Factual narrative On February 8, 1994, at approximately 1705 Alaska standard time, a wheel equipped Cessna 207 airplane, N6470H, owned and operated by Yute Air Alaska, collided with runway 33 during a landing attempt at Kwigillingok, Alaska. The airline transport certificated pilot-in-command and the five revenue passengers on board were not injured and the airplane sustained substantial damage. The scheduled commuter flight, conducted under 14 CFR Part 135 and operating as Flight 532, last departed Bethel, Alaska, at 1610 and the destination was Kwigillingok. Visual meteorological conditions prevailed in the general area of the accident site and a company VFR flight plan was in effect. During a telephone interview on the afternoon of February 10, 1994, the pilot-in-command informed the NTSB investigator-in- charge that there were patches of fog along the approach corridor to the airport and that the runway environment was obscured. The inflight visibility outside the airport traffic pattern area was from two to five miles. The visibility over the approach end of the runway and along the direct approach corridor to the runway was approximately one mile. At an altitude of about 400 feet above the ground and approximately 1 1/2 miles from the runway threshold, he maneuvered the airplane to the right of a fog bank and took up a heading that paralleled the runway. When he visually acquired the runway, it was about 100 feet to his left. By this time, he had selected and gotten full extension of the plane's wing flaps. He then throttle the plane's engine to idle and made a left turn towards the runway using approximately 25 to 30 degrees of bank. He overshot the runway centerline and initiated a right banking turn of about 25 to 30 degrees to align the airplane with the runway. While performing the turn, the airplane stalled and the right wing collided with the runway. The toxological results on the pilot were negative. ## 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: 12245 - Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Registered owner: Yute Air Alaska - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, February 7, 1994, 4 hours before - Departed: BET, BETHEL, AK - Flight plan: Company VFR - Airport: AK85, Kwigillingok, runway 33, 2,500 × 25 ft, snow ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 24; flight instructor, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 3,621 total, 708 in this make and model, 3,496 as pilot in command, 306 in the last 90 days, 91 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 1 statute miles - Lowest ceiling: 800 ft broken - Temperature: 30 °F - Observed at: BET, 75 nm away ## 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 19940208003569A](https://openairdocs.org/incident/19940208003569A), Feb 8, 1994: Cessna 207A, Kwigillingok, AK, Substantial damage. Maneuvered to avoid fog approach end runway. Saw runway veered back but stalled trying to realign. Wing hit runway. ## 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 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.