Aircraft Accident/Incident Report

Iliamna, Alaska 99606
Tuesady, June 29, 2010 17:45 AKD

NTSB Narrative Summary Released at Completion of Accident

The float-equipped airplane was in cruise flight on a sightseeing flight when there was a total loss of engine power. After several unsuccessful attempts to restart the engine, the pilot made a forced landing on tundra-covered terrain, and the airplane nosed over. Postaccident disassembly of the engine found that the crankshaft had fractured at the No. 2 journal. Laboratory examination of the crankshaft found "ladder cracking" associated with the journal fracture, which is consistent with a reduced oil flow and overheating of the surface area. At the time of the accident, the engine had 441 hours of operation since major overhaul, which was performed on October 21, 2008.

NTSB Probable Cause Narrative

The total loss of engine power during cruise flight due to a fractured crankshaft.

Event Information

Type of Event Accident
Event Date 6/29/2010
Event Day of the Week Tuesday
Time of Event 1745
Event Time Zone --
Event City Iliamna
Event State ALASKA
Event Country --
Zipcode of the event site 99606
Event Date Year 2010
Event Date Month 6
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 593854N
Event Location Longitude 1552512W
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 Pilot
Time of the weather observation 1753 Atlantic Daylight Time
Direction of event from weather observation facility (degrees) 60
Weather Observation Facility ID ILI
Elevation of weather observation facility 192
Distance of event from weather observation facility (units?) 16
Time Zone of the weather observation ADT
Lighting Conditions Day
Lowest Ceiling Height 3300
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) 7
Wind Direction (degrees magnetic) 100
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 10
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.79
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury Minor
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor 1
Injury Total None 5
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 29343
NTSB Notification Source FAA Anchorage, ROC
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Dec 1 2011 6:21PM
User who most recently changed record stam
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N4596U
NTSB Number ANC10LA056
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 135: Air Taxi & Commuter
Type of Flight Plan filed Company VFR
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name CESSNA
Aircraft Model U206G
Aircraft Series Identifier --
Aircraft Serial Number U20604990
Certified Max Gross Weight 3800
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 6
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection 100 Hour
Date of Last Inspection Jun 3 2010 12:00AM
Airframe hours since last inspection --
Airframe Hours 15612
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type C126
Aircraft Owner Name RUSTAIR INC
Aircraft Owner Street Address 4525 ENSTROM CIR
Aircraft Owner City ANCHORAGE
Aircraft Owner State AK
Aircraft Owner Country USA
Aircraft Owner Zipcode 99502-1083
Operator is an individual? No
Operator Name RUSTS FLYING SERVICE INC
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address 4525 ENSTROM CIR
Operator City ANCHORAGE
Operator State AK
Operator Country USA
Operator Zip code 99502-1083
Operator Code ERHA
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation --
Operator Certificate Number ERHA673D
Indicates whether an air carrier operation was scheduled or not Non-scheduled
Indicates Domestic or International Flight Domestic
Operator carrying Pax/Cargo/Mail Passenger Only
Type of Flying (Per_Bus / Primary) --
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code AKN
Departure City King Salmon
Departure State AK
Departure Country USA
Departure Time 1645
Departure Time Zone ADT
Destination Same as Local Flt --
Destination Airport Code PALH
Destination City Anchorage
Destination State AK
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Dec 1 2011 6:15PM
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 Yes
Air Medical Flight No
Medical Flight --