Individually Owned: 150,657
Corporate Owned: 137,281
Juneau International Airport
Aircraft Accident/Incident Report
Juneau, Alaska 99801
Thursday, December 13, 2012 14:09 AST
NTSB Narrative Summary Released at Completion of Accident
The flight instructor was demonstrating a short field, three-point landing. The touchdown was normal, but during the landing roll a gust of wind pushed the airplane, and it began to turn to the right. The instructor applied left brake in an attempt to correct for the right turn, and the airplane’s left main landing gear broke. As the broken gear leg dug into the runway, the airplane pivoted 180 degrees to the left, and the left wing struck the runway. The airplane sustained substantial damage to the left wing and fuselage. The flight instructor stated that during the last annual inspection, about 4 months before the accident, he observed corrosion on the main landing gear legs and ground it off using a hand-held grinder. The service manual specified to carefully remove any rust by light sanding; the sanding must blend the damage into the adjacent area in an approximate 20:1 ratio. Examination of the landing gear revealed evidence of the improper maintenance and corrosion damage, which weakened the gear and led to fatigue cracking and an overstress fracture.
NTSB Probable Cause Narrative
The collapse of the left main landing gear during the landing roll, as a result of fatigue cracking. Contributing to the accident was the improper maintenance of the landing gear.
Event Information
| Type of Event | Accident |
| Event Date | 12/13/2012 |
| Event Day of the Week | Thursday |
| Time of Event | 1409 |
| Event Time Zone | Atlantic Standard Time |
| Event City | Juneau |
| Event State | ALASKA |
| Event Country | -- |
| Zipcode of the event site | 99801 |
| Event Date Year | 2012 |
| Event Date Month | 12 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 582117N |
| Event Location Longitude | 1343434W |
| Event Location Airport | Juneau International Airport |
| Event Location Nearest Airport ID | PAJN |
| 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 | 1353 Atlantic Standard Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | JNU |
| Elevation of weather observation facility | 21 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | AST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 3900 |
| Lowest Non-Ceiling Height | 2000 |
| Sky/Lowest/Cloud Conditions | Few |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 2 |
| Dew Point at event time (in degress fahrenheit) | 0 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | -- |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.44 |
| 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 | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 31040 |
| NTSB Notification Source | Alaskan FAA Regional Operation |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Jan 9 2013 12:47PM |
| User who most recently changed record | stam |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N1901Z |
| NTSB Number | ANC13LA016 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | CESSNA |
| Aircraft Model | 150C |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 15059701 |
| Certified Max Gross Weight | 1500 |
| 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 17 2012 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 6911 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | C126 |
| Aircraft Owner Name | ALASKA FLIGHT CENTER INC |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | JUNEAU |
| Aircraft Owner State | AK |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 99803-5721 |
| Operator is an individual? | No |
| Operator Name | ALASKA FLIGHT CENTER INC |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | JUNEAU |
| Operator State | AK |
| Operator Country | USA |
| Operator Zip code | 99803-5721 |
| 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) | Instructional |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | JNU |
| Departure City | Juneau |
| Departure State | AK |
| Departure Country | USA |
| Departure Time | -- |
| Departure Time Zone | AST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | -- |
| Destination City | Juneau |
| Destination State | AK |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 9 2013 12:37PM |
| User who most recently changed record | stam |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 08 |
| Runway Length | 8457 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |