Monday, August 28, 2017

Piper PA-12, N3233M: Accident occurred August 26, 2017 -and- Accident occurred January 14, 2010 in Gulkana, Alaska -and- Accident occurred February 01, 2007 in Glennallen, Alaska

Federal Aviation Administration / Flight Standards District Office; Anchorage, Alaska

http://registry.faa.gov/N3233M


NTSB Identification: GAA17CA511
14 CFR Part 135: Air Taxi & Commuter
Accident occurred Saturday, August 26, 2017 in Gulkana, AK
Aircraft: PIPER PA 12, registration: N3233M

NTSB investigators will use data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator, and will not travel in support of this investigation to prepare this aircraft accident report.

Engine failure on takeoff. Off airport landing.

FAA FSDO: AAL

Date: 28-AUG-17
Time: 23:00:00Z
Regis#: N3233M
Aircraft Make: PIPER
Aircraft Model: PA12
Event Type: ACCIDENT
Highest Injury: NONE
Aircraft Missing: No
Damage: SUBSTANTIAL
Activity: ON DEMAND
Flight Phase: TAKEOFF (TOF)
Operation: 135
City: GULKANA
State: ALASKA 

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Anchorage, Alaska

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms

Aviation Accident Data Summary - National Transportation Safety Board: https://app.ntsb.gov/pdf

Registered Owner:  Copper Valley Air Service LLC
Operator: Copper Valley Air Service LLC

NTSB Identification: ANC10LA012
Nonscheduled 14 CFR Part 135: Air Taxi & Commuter
Accident occurred Thursday, January 14, 2010 in Gulkana, AK
Probable Cause Approval Date: 07/15/2010
Aircraft: PIPER PA-12, registration: N3233M
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The commercial pilot was on a passenger flight when the accident occurred. The pilot said that, due to the cold outside temperature, he departed with the airplane's oil cooler cover in place. He said that the engine temperature increased and that he decided to land and remove the oil cooler cover. He then landed on a snow-covered lake and after landing he continued laying down tracks in the snow to aid in his departure. While laying down tracks the airplane's skis hit a ridge hidden under the snow. The pilot then examined the airplane and found that a fuselage frame tube had broken near the right main landing gear attachment. The pilot said that there were no mechanical problems with the airplane prior to the accident.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The pilot's selection of unsuitable terrain for landing, which resulted in structural damage to the airplane during landing.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on January 15, the pilot said that due to the cold outside temperature, he departed Gulkana with the airplane's oil cooler cover in place. He said after departing, the engine temperature increased significantly, and he decided to land and remove the oil cooler cover. He reported that he chose a snow-covered lake for landing, and that after landing, he continued laying down tracks in the newly fallen snow to aid in his departure. The pilot said while laying down tracks the airplane's skis hit a ridge hidden under the snow. He said he examined the airplane and found a fuselage frame tube had broken near the right main landing gear attachment. He said he called for another airplane to pickup his passenger. The pilot said there were no mechanical problems with the airplane prior to the flight.

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Aviation Accident Data Summary - National Transportation Safety Board: https://app.ntsb.gov/pdf

Registered Owner: Copper Valley Air Service LLC

NTSB Identification: ANC07LA018
The docket is stored in the Docket Management System (DMS). Please contact Records Management Division
Accident occurred Thursday, February 01, 2007 in Glennallen, AK
Probable Cause Approval Date: 05/29/2007
Aircraft: Piper PA-12, registration: N3233M
Injuries: 1 Minor, 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The commercial certificated pilot was maneuvering to land his ski-equipped airplane on a snow-covered lake during a Title 14, CFR Part 91, personal flight. The pilot reported that he and his passenger were scouting the area for a wolf hunt, and decided to land on a remote frozen lake. While making a slight left turn toward the landing area, he said he encountered a windshear about 20 feet above the ground. He said the airplane was configured with 20 degrees of flaps, and the airspeed was about 45 mph. The pilot indicated the left wing stalled, and the airplane descended, colliding with the surface of the lake. The airplane received structural damage to the left wing, fuselage, and landing gear. The pilot described the wind conditions as light and variable winds, with no gusts. He also indicated that the wind shifted several times after the accident.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The pilot's failure to maintain adequate airspeed to preclude a stall while maneuvering, which resulted in an uncontrolled descent and subsequent collision with terrain. Factors contributing to the accident were variable wind conditions, and an inadvertent stall.

On February 1, 2007, about 0945 Alaska Standard time, a ski-equipped Piper PA-12 airplane, N3233M, sustained substantial damage when it collided with snow-covered terrain while maneuvering to land on a remote lake, about 30 miles northwest of Glennallen, Alaska. The airplane was being operated as a visual flight rules (VFR) local area personal flight under Title 14, CFR Part 91 when the accident occurred. The airplane was operated in visual meteorological conditions by the pilot/owner of Copper Valley Air Service, LLC, Glennallen. The commercial certificated pilot was not injured. The sole passenger received minor injuries. The flight originated at the Gulkana Airport, Gulkana, Alaska, about 0920, and no flight plan was filed.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on February 2, the pilot reported that he and the passenger were scouting the area for a wolf hunt, and decided to land on a frozen lake. While making a slight left turn toward the landing area, he said he encountered a windshear about 20 feet above the ground. He said the airplane was configured with 20 degrees of flaps, and the airspeed was about 45 mph. The pilot indicated the left wing stalled, and the airplane descended, colliding with the surface of the lake. The airplane received structural damage to the left wing, fuselage, and landing gear.

On the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1) submitted by the pilot, the pilot described the weather conditions as clear, visibility unlimited, a temperature of about 15 degrees F, light and variable winds, with no gusts. He also indicated that he observed several wind shifts after the accident.

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