Friday, April 01, 2022

Aviat A-1B, N35AH: Accidents occurred March 30, 2022 and June 09, 2019












Aviation Accident Final Report - National Transportation Safety Board

The National Transportation Safety Board did not travel to the scene of this accident. 

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Salt Lake City, Utah

Investigation Docket - National Transportation Safety Board:

K9 Air LLC


Location: Swan Valley, Idaho
Accident Number: WPR22LA139
Date and Time: March 30, 2022, 12:00 Local 
Registration: N35AH
Aircraft: AVIAT AIRCRAFT INC A-1B
Aircraft Damage: Substantial
Defining Event: Loss of control on ground 
Injuries: 1 None
Flight Conducted Under: Part 91: General aviation - Personal

Analysis

The pilot reported that, during a landing on a snow-covered, private grass airstrip, he did not adequately confirm the landing surface condition. Subsequently, as the airplane slowed down during the landing roll, the landing gear penetrated through a shallow layer of hard packed snow and then dug into several inches of snow, which caused the airplane to nose over. The airplane sustained substantial damage to the right wing. The pilot reported no preaccident malfunctions or failures with the airplane that would have precluded normal operation.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot’s failure to maintain airplane control during the landing roll on a snow-covered runway surface.

Findings

Personnel issues Identification/recognition - Pilot
Personnel issues Aircraft control - Pilot
Environmental issues Snow/slush/ice covered surface - Effect on equipment

Factual Information

History of Flight

Landing-landing roll Loss of control on ground (Defining event)
Landing Nose over/nose down

Pilot Information

Certificate: Commercial 
Age: 65, Male
Airplane Rating(s): Single-engine land
Seat Occupied: Front
Other Aircraft Rating(s): Glider
Restraint Used: 5-point
Instrument Rating(s): None 
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed:
Medical Certification: Class 3 With waivers/limitations
Last FAA Medical Exam: June 10, 2021
Occupational Pilot:
Last Flight Review or Equivalent: June 15, 2021
Flight Time: (Estimated) 1955 hours (Total, all aircraft), 443 hours (Total, this make and model), 1894 hours (Pilot In Command, all aircraft), 13.6 hours (Last 90 days, all aircraft), 7 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: AVIAT AIRCRAFT INC
Registration: N35AH
Model/Series: A-1B 
Aircraft Category: Airplane
Year of Manufacture: 2007 
Amateur Built:
Airworthiness Certificate: Normal 
Serial Number: 2417
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: April 1, 2021 Annual
Certified Max Gross Wt.: 2200 lbs
Time Since Last Inspection: Engines: 1
Airframe Total Time: 1082 Hrs at time of accident
Engine Manufacturer:
ELT: C91A installed, not activated 
Engine Model/Series:
Registered Owner: 
Rated Power:
Operator: On file 
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: KDIJ,6229 ft msl
Distance from Accident Site: 18 Nautical Miles
Observation Time: 12:56 Local 
Direction from Accident Site: 42°
Lowest Cloud Condition: Clear
Visibility 10 miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 4 knots / 
Turbulence Type Forecast/Actual:  /
Wind Direction: 70°
Turbulence Severity Forecast/Actual:  /
Altimeter Setting: 30 inches Hg 
Temperature/Dew Point: 3°C / -7°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Idaho Falls, ID (IDA)
Type of Flight Plan Filed: None
Destination: Swan Valley, ID
Type of Clearance: None
Departure Time: 11:30 Local 
Type of Airspace: Class G

Airport Information

Airport: Diamond AIrstrip PVT
Runway Surface Type: Grass/turf;Snow
Airport Elevation: 5850 ft msl 
Runway Surface Condition: Snow
Runway Used: 10/28 
IFR Approach: None
Runway Length/Width: 2000 ft / 90 ft
VFR Approach/Landing: Full stop;Traffic pattern

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 1 None 
Latitude, Longitude: 43.51958,-111.38095(est)

March 30, 2022: Aircraft flipped during landing.

Date: 30-MAR-22
Time: 18:00:00Z
Regis#: N35AH
Aircraft Make: AVIAT
Aircraft Model: A-1B
Event Type: ACCIDENT
Highest Injury: NONE
Aircraft Missing: No
Damage: SUBSTANTIAL
Activity: PERSONAL
Flight Phase: LANDING (LDG)
Operation: 91
City: SWAN VALLEY
State: IDAHO


June 09, 2019

June 09, 2019





Aviation Accident Final Report - National Transportation Safety Board

The National Transportation Safety Board did not travel to the scene of this accident. 

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Salt Lake City, Utah

Investigation Docket - National Transportation Safety Board:

K9 Air LLC


Location: Pingree, ID
Accident Number: GAA19CA325
Date & Time: 06/09/2019, 1500 MDT
Registration: N35AH
Aircraft: Aviat A1
Aircraft Damage: Substantial
Defining Event: Runway excursion
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal 

Analysis 

The pilot of the tailwheel-equipped airplane reported that, while landing on a private, dirt airstrip, he lost sight of the airstrip, and the airplane veered left. Concerned the airplane would ground loop, he applied minimal right rudder. He then chose to abort the landing and applied full power. As the airplane was about to become airborne, it exited the runway to the left, and the main landing gear encountered water. The pilot reduced the engine power to idle, and the airplane nosed over.

The airplane sustained substantial damage to the left wing lift strut.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's improper rudder application during landing on a dirt airstrip, which resulted in a loss of directional control, runway excursion, and subsequent nose-over

Findings

Aircraft Directional control - Not attained/maintained
Personnel issues Aircraft control - Pilot
Personnel issues Use of equip/system - Pilot
Aircraft Rudder control system - Incorrect use/operation
Environmental issues Water/moisture - Effect on operation

Factual Information

History of Flight

Landing Loss of control on ground
Landing-aborted after touchdown Attempted remediation/recovery 
Landing-aborted after touchdown Runway excursion (Defining event)
Landing-aborted after touchdown Nose over/nose down

Pilot Information

Certificate: Private
Age: 57, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Front
Other Aircraft Rating(s): Glider
Restraint Used:
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 Without Waivers/Limitations
Last FAA Medical Exam: 03/25/2018
Occupational Pilot: No
Last Flight Review or Equivalent: 09/14/2018
Flight Time:   (Estimated) 1230.6 hours (Total, all aircraft), 78.4 hours (Total, this make and model), 1185.2 hours (Pilot In Command, all aircraft), 41.2 hours (Last 90 days, all aircraft), 21.4 hours (Last 30 days, all aircraft), 3 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Aviat
Registration: N35AH
Model/Series: A1 B
Aircraft Category: Airplane
Year of Manufacture: 2007
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 2417
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: 03/29/2019, Annual
Certified Max Gross Wt.: 2200 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 608.7 Hours at time of accident
Engine Manufacturer: Lycoming
ELT: C91A installed, activated, did not aid in locating accident
Engine Model/Series: IO-360-A1D6
Registered Owner: K9 Air Llc
Rated Power: 200 hp
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: KPIH, 4478 ft msl
Distance from Accident Site: 12 Nautical Miles
Observation Time: 2053 UTC
Direction from Accident Site: 172°
Lowest Cloud Condition: Few / 6000 ft agl
Visibility:  10 Miles
Lowest Ceiling:
Visibility (RVR):
Wind Speed/Gusts: 7 knots /
Turbulence Type Forecast/Actual: None / None
Wind Direction: 320°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.49 inches Hg
Temperature/Dew Point: 17°C / -3°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Paris, ID (1U7)
Type of Flight Plan Filed: None
Destination: Pingree, ID (PVT)
Type of Clearance: None
Departure Time: 1330 MDT
Type of Airspace: Class G

Airport Information

Airport: Private Field (PVT)
Runway Surface Type: Dirt
Airport Elevation: 4455 ft
Runway Surface Condition: Dry
Runway Used: 21
IFR Approach: None
Runway Length/Width: 4000 ft / 60 ft
VFR Approach/Landing: Stop and Go; Traffic Pattern

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 1 None
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude: 43.117222, -112.607778 (est)

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