Kwethluk Airport
Aircraft Accident/Incident Report

Bethel, Alaska 99559
Thursday, September 13, 2012 18:00 AKD

NTSB Narrative Summary Released at Completion of Accident

The private pilot reported that he was taking off on a gravel runway in a tailwheel-equipped airplane. He said that during the takeoff roll, as the tail of the airplane came off the ground, the airplane started drifting to the left, and he overcompensated with right rudder, resulting in a ground loop. The airplane sustained substantial damage to the left wing. The pilot indicated that there were no preaccident mechanical anomalies with the airplane that would have precluded normal operation.

NTSB Probable Cause Narrative

The pilot's failure to maintain directional control during takeoff, which resulted in a ground loop.

Event Information

Type of Event Accident
Event Date 9/13/2012
Event Day of the Week Thursday
Time of Event 1800
Event Time Zone --
Event City Bethel
Event State ALASKA
Event Country --
Zipcode of the event site 99559
Event Date Year 2012
Event Date Month 9
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 604722N
Event Location Longitude 1612534W
Event Location Airport Kwethluk
Event Location Nearest Airport ID PFKW
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Weather Observation Facility
Time of the weather observation 1753 Atlantic Daylight Time
Direction of event from weather observation facility (degrees) 248
Weather Observation Facility ID PABE
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) 12
Time Zone of the weather observation ADT
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height 2900
Sky/Lowest/Cloud Conditions Few
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 8
Dew Point at event time (in degress fahrenheit) 2
Wind Direction (degrees magnetic) 190
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 5
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.83
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report METAR PABE 140153Z 19005KT 10SM FEW029 08/02 A2983
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 2
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 30693
NTSB Notification Source FAA AAL Regional Operations Ce
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Oct 28 2012 12:38AM
User who most recently changed record stam
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N543AR
NTSB Number ANC12CA105
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Substantial
Aircraft Fire None
Aircraft Explosion --
Aircraft Manufacturer's Full Name CESSNA
Aircraft Model 170B
Aircraft Series Identifier --
Aircraft Serial Number 20704
Certified Max Gross Weight --
Aircraft Category Airplane
Aircraft Registration Class --
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 4
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection May 28 2012 12:00AM
Airframe hours since last inspection 0
Airframe Hours 12167
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type C91-A
Aircraft Owner Name LEFFERTS BRIAN
Aircraft Owner Street Address --
Aircraft Owner City BETHEL
Aircraft Owner State AK
Aircraft Owner Country USA
Aircraft Owner Zipcode 99559
Operator is an individual? Yes
Operator Name LEFFERTS BRIAN
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City BETHEL
Operator State AK
Operator Country USA
Operator Zip code 99559
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board Yes
Departure Point Same as Event Yes
Departure Airport Code PFKW
Departure City Bethel
Departure State AK
Departure Country USA
Departure Time --
Departure Time Zone ADT
Destination Same as Local Flt --
Destination Airport Code PABE
Destination City Bethel
Destination State AK
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Oct 28 2012 12:37AM
User who most recently changed record stam
Since inspection or accident Last Inspection
Event Location Runway Number and Location 18
Runway Length 3199
Runway Width 75
Sight Seeing flight No
Air Medical Flight No
Medical Flight --