Tuesday, June 25, 2019

Loss of Control on Ground: Cessna 170B, N4427B; accident occurred June 17, 2019 in Hewitt Lake, Alaska

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

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

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

https://registry.faa.gov/N4427B

Location: Hewitt Lake, AK
Accident Number: GAA19CA364
Date & Time: 06/17/2019, 0600 AKD
Registration: N4427B
Aircraft: Cessna 170
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal

The pilot of the tailwheel-equipped airplane reported that, during takeoff from a soft, grass airstrip, the airplane hit a hole. The airplane veered to the right and the pilot attempted to correct to the left, but the airplane hit brush.

The airplane sustained substantial damage to the right wing and right elevator.

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

Pilot Information

Certificate: Private
Age: 58, Female
Airplane Rating(s): Single-engine Land; Single-engine Sea
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used:
Instrument Rating(s): None
Second Pilot Present: Yes
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 With Waivers/Limitations
Last FAA Medical Exam: 06/01/2018
Occupational Pilot: No
Last Flight Review or Equivalent: 06/04/2019
Flight Time:  (Estimated) 768 hours (Total, all aircraft), 678 hours (Total, this make and model), 646 hours (Pilot In Command, all aircraft), 8 hours (Last 90 days, all aircraft), 8 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Cessna
Registration: N4427B
Model/Series: 170 B
Aircraft Category: Airplane
Year of Manufacture: 1955
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 26771
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: 06/02/2019, Annual
Certified Max Gross Wt.: 2200 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 4360.9 Hours at time of accident
Engine Manufacturer: Continental
ELT: C91A installed, not activated
Engine Model/Series: O-360-A1A
Registered Owner: Wegscheider, Martin Josef
Rated Power: 180 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: PAHC, 20 ft msl
Distance from Accident Site: 16 Nautical Miles
Observation Time: 1355 UTC
Direction from Accident Site: 315°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR): 
Wind Speed/Gusts:Calm / 
Turbulence Type Forecast/Actual: None / None
Wind Direction:
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.09 inches Hg
Temperature/Dew Point:11°C / 7°C 
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Hewitt Lake, AK
Type of Flight Plan Filed: None
Destination: Willow, AK (UUO)
Type of Clearance: None
Departure Time: 0600 AKD
Type of Airspace: Class G  

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: 61.996389, -159.366944 (est)


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

http://registry.faa.gov/N4427B



Location: Anchorage, AK
Accident Number: GAA18CA370
Date & Time: 06/21/2018, 1020 AKD
Registration: N4427B
Aircraft: CESSNA 170
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries: 1 None
Flight Conducted Under: Part 91: General Aviation - Personal

Analysis

The pilot of the float-equipped airplane reported that, during landing, the touchdown on the water was smooth. While the airplane was on step, she reduced the flaps, and the airplane suddenly veered left. She applied right rudder and reduced engine power. The left float hit the concrete shore bank, the airplane spun to the left, and the right wing struck the shore.

The airplane sustained substantial damage to the fuselage and both wings.

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 failure to maintain directional control during landing.

Findings

Aircraft
Directional control - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

Environmental issues
Object/animal/substance - Contributed to outcome

Factual Information

History of Flight

Landing
Loss of control on ground (Defining event)
Attempted remediation/recovery 

Pilot Information

Certificate: Private
Age: 57, Female
Airplane Rating(s): Single-engine Land; Single-engine Sea
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: None
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 With Waivers/Limitations
Last FAA Medical Exam: 06/01/2018
Occupational Pilot: No
Last Flight Review or Equivalent: 10/06/2017
Flight Time:  (Estimated) 760 hours (Total, all aircraft), 670 hours (Total, this make and model), 642 hours (Pilot In Command, all aircraft), 6 hours (Last 90 days, all aircraft), 6 hours (Last 30 days, all aircraft), 2 hours (Last 24 hours, all aircraft)



Aircraft and Owner/Operator Information

Aircraft Make: CESSNA
Registration: N4427B
Model/Series: 170 B
Aircraft Category: Airplane
Year of Manufacture: 1955
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 26771
Landing Gear Type: Float;
Seats: 2
Date/Type of Last Inspection: 04/28/2018, Annual
Certified Max Gross Wt.: 2106 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 4352.9 Hours at time of accident
Engine Manufacturer: Lycoming
ELT: C91A installed, not activated
Engine Model/Series: O-360-A1A
Registered Owner: MARTIN JOSEF WEGSCHEIDER
Rated Power: 180 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: PALH, 90 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 1830 UTC
Direction from Accident Site: 220°
Lowest Cloud Condition: Few / 12000 ft agl
Visibility:  10 Miles
Lowest Ceiling:
Visibility (RVR):
Wind Speed/Gusts: Calm /
Turbulence Type Forecast/Actual: None / None
Wind Direction: 
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 29.74 inches Hg
Temperature/Dew Point: 16°C / 11°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Skwentna, AK
Type of Flight Plan Filed: None
Destination: Anchorage, AK (LHD)
Type of Clearance: None
Departure Time: 0937 AKD
Type of Airspace: Class D

Airport Information

Airport: LAKE HOOD (LHD)
Runway Surface Type: Water
Airport Elevation: 79 ft
Runway Surface Condition: Water--calm
Runway Used: W
IFR Approach: None
Runway Length/Width: 4541 ft / 188 ft
VFR Approach/Landing: Full Stop

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude:  61.178889, -149.964444 (est)

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