Aircraft Accident/Incident Report

Gulkana, Alaska 99695
Thursday, September 3, 2009 12:08 AKD

NTSB Narrative Summary Released at Completion of Accident

The pilot was on a federal public use wildlife surveillance flight under Title 14, Code of Federal Regulations Part 91. The pilot reported that while landing at an off-airport site he applied the brakes too hard and the airplane nosed over. He reported that there were no preaccident mechanical anomalies, and that the airplane sustained substantial damage to both wing lift struts, the vertical stabilizer, and the tops of the wings.

NTSB Probable Cause Narrative

The pilot's excessive use of brakes during an off-airport landing, resulting in the airplane nosing over.

Event Information

Type of Event Accident
Event Date 9/3/2009
Event Day of the Week Thursday
Time of Event 1208
Event Time Zone --
Event City Gulkana
Event State ALASKA
Event Country --
Zipcode of the event site 99695
Event Date Year 2009
Event Date Month 9
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 620918N
Event Location Longitude 1452716W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
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 1153 Atlantic Daylight Time
Direction of event from weather observation facility (degrees) 255
Weather Observation Facility ID PAGK
Elevation of weather observation facility 1586
Distance of event from weather observation facility (units?) 19
Time Zone of the weather observation ADT
Lighting Conditions Day
Lowest Ceiling Height 18000
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 12
Dew Point at event time (in degress fahrenheit) 4
Wind Direction (degrees magnetic) --
Variable Wind Indicator Variable
Wind Speed (knots) 6
Wind Velocity Indicator --
Wind Gust Indicator Gusting
Wind Gust (knots) 8
Altimeter Setting at event time (in. Hg) 29.77
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
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 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 27139
NTSB Notification Source Department of Interior
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Jul 7 2010 5:28PM
User who most recently changed record stam
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N37HY
NTSB Number ANC09TA092
Missing Aircraft Indicator --
Federal Aviation Reg. Part Public Use
Type of Flight Plan filed Company VFR
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name AVIAT AIRCRAFT INC
Aircraft Model A-1B
Aircraft Series Identifier --
Aircraft Serial Number 2037
Certified Max Gross Weight 2000
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 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Aug 27 2009 12:00AM
Airframe hours since last inspection --
Airframe Hours 2311
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type C126
Aircraft Owner Name UNITED STATES DEPARTMENT OF INTERIOR
Aircraft Owner Street Address 4405 LEAR CT
Aircraft Owner City ANCHORAGE
Aircraft Owner State AK
Aircraft Owner Country USA
Aircraft Owner Zipcode 99502-1032
Operator is an individual? No
Operator Name UNITED STATES DEPARTMENT OF INTERIOR
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address 4405 LEAR CT
Operator City ANCHORAGE
Operator State AK
Operator Country USA
Operator Zip code 99502-1032
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) --
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code GKN
Departure City Gulkana
Departure State AK
Departure Country USA
Departure Time 1136
Departure Time Zone ADT
Destination Same as Local Flt crash at destination city
Destination Airport Code --
Destination City Gulkana
Destination State AK
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jul 7 2010 5:28PM
User who most recently changed record stam
Since inspection or accident Time of Accident
Event Location Runway Number and Location N/A
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --