Tuesday, December 22, 2015

Piper PA-18A Super Cub, N2791P: Accident occurred April 07, 2020 in Chickaloon, Alaska; accident occurred October 13, 2016 in Palmer, Alaska; accident occurred December 21, 2015 in Girdwood, Alaska

View of accident airplane. 




Aviation Accident Final Report - National Transportation Safety Board

Additional Participating Entity: 

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

Investigation Docket - National Transportation Safety Board:


Location: Chickaloon, AK
Accident Number: ANC20CA041
Date & Time: 04/07/2020, 1230 AKD
Registration: N2791P
Aircraft: Piper PA 18A
Aircraft Damage: Substantial
Defining Event: Controlled flight into terr/obj (CFIT)
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal 

Analysis

The pilot reported that she was landing the airplane at a remote area of mountainous, snow-covered terrain and that she had selected an area that was slightly uphill for landing. She felt uncomfortable with the final stages of the approach, so she chose to go around. During the go-around, she added full power and started a left turn. The airplane subsequently impacted an area of rising, snow-covered terrain, which resulted in substantial damage to the right wing and fuselage. The pilot added that she should have made another practice approach or two to verify the wind direction and local terrain conditions.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's selection of unsuitable terrain for landing, which necessitated a go-around, and her subsequent failure to maintain clearance from rising mountainous terrain.

Findings

Personnel issues Decision making/judgment - Pilot
Aircraft Altitude - Not attained/maintained
Environmental issues Mountainous/hilly terrain - Effect on operation
Environmental issues Mountainous/hilly terrain - Decision related to condition

Factual Information

History of Flight

Approach-VFR go-around Miscellaneous/other
Approach-VFR go-around Controlled flight into terr/obj (CFIT) (Defining event)

Pilot Information

Certificate: Private
Age: 40, Female
Airplane Rating(s): Single-engine Land
Seat Occupied: Front
Other Aircraft Rating(s): None
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: 04/18/2018
Occupational Pilot: No
Last Flight Review or Equivalent: 06/03/2019
Flight Time:   (Estimated) 400 hours (Total, all aircraft), 350 hours (Total, this make and model), 400 hours (Pilot In Command, all aircraft), 25 hours (Last 90 days, all aircraft), 14 hours (Last 30 days, all aircraft), 1.7 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Piper
Registration: N2791P
Model/Series: PA 18A 150
Aircraft Category: Airplane
Year of Manufacture: 1955
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 18-4426
Landing Gear Type: Ski/wheel; Tailwheel
Seats: 3
Date/Type of Last Inspection: 06/01/2019, Annual
Certified Max Gross Wt.: 1750 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 3600 Hours at time of accident
Engine Manufacturer: Lycoming
ELT: C126 installed, not activated
Engine Model/Series: O-320-A2B
Registered Owner: On file
Rated Power:160 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: PAAQ, 230 ft msl
Distance from Accident Site: 56 Nautical Miles
Observation Time: 2053 UTC
Direction from Accident Site: 274°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: Light and Variable /
Turbulence Type Forecast/Actual:
Wind Direction: Variable
Turbulence Severity Forecast/Actual:
Altimeter Setting: 30.1 inches Hg
Temperature/Dew Point: -1°C / -17°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Girdwood, AK (AQY)
Type of Flight Plan Filed: None
Destination: Chickaloon, AK
Type of Clearance: None
Departure Time: 1045 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: 61.539722, -147.134444 (est)

October 13, 2016



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

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


Location: Palmer, AK
Accident Number: GAA17CA027
Date & Time: 10/13/2016, 1645 AKD
Registration: N2791P
Aircraft: PIPER PA18
Aircraft Damage: Substantial
Defining Event: Nose over/nose down
Injuries: 1 Minor
Flight Conducted Under: Part 91: General Aviation - Personal

Analysis 

The pilot of the tailwheel equipped airplane reported that while braking during the landing roll on a gravel airstrip the right main tire encountered a ground depression. Subsequently, the airplane nosed over and sustained substantial damage to the right wing lift strut and vertical stabilizer.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airframe or engine 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 airplane's encounter with a depression while the pilot applied excessive braking during the landing roll on a grass airstrip, which resulted in a nose-over.

Findings

Aircraft
Brake - Incorrect use/operation (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

Environmental issues
Soft surface - Effect on operation (Cause)

Factual Information

History of Flight

Landing-landing roll
Nose over/nose down (Defining event)

Pilot Information

Certificate: Private
Age: 36, Female
Airplane Rating(s): Single-engine Land
Seat Occupied: Front
Other Aircraft Rating(s): None
Restraint Used: Unknown
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 1 Without Waivers/Limitations
Last FAA Medical Exam: 04/26/2013
Occupational Pilot: No
Last Flight Review or Equivalent: 06/27/2015
Flight Time:  (Estimated) 276.5 hours (Total, all aircraft), 219.4 hours (Total, this make and model), 276.5 hours (Pilot In Command, all aircraft), 5.3 hours (Last 90 days, all aircraft), 3.7 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: PIPER
Registration: N2791P
Model/Series: PA18 A
Aircraft Category: Airplane
Year of Manufacture: 1955
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 18-4426
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: 05/13/2016, Annual
Certified Max Gross Wt.: 1750 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 3409.7 Hours as of last inspection
Engine Manufacturer: LYCOMING
ELT: C126 installed, activated, did not aid in locating accident
Engine Model/Series: O-320-A2B
Registered Owner: On file
Rated Power: 160 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: PAAQ, 230 ft msl
Distance from Accident Site: 18 Nautical Miles
Observation Time: 2353 UTC
Direction from Accident Site: 310°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 4 knots /
Turbulence Type Forecast/Actual: / None
Wind Direction: 230°
Turbulence Severity Forecast/Actual: / N/A
Altimeter Setting: 29.33 inches Hg
Temperature/Dew Point: 9°C / -4°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: GIRDWOOD, AK (AQY)
Type of Flight Plan Filed: None
Destination:Palmer, AK 
Type of Clearance: None
Departure Time: 1530 AKD
Type of Airspace: Class G 

Wreckage and Impact Information

Crew Injuries: 1 Minor
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 Minor
Latitude, Longitude: 61.401111, -148.600556 (est)


View of damage to right wing.
Federal Aviation Administration

View of damage to right aileron.
Federal Aviation Administration


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


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

Location: Girdwood, AK
Accident Number: GAA16CA102
Date & Time: 12/21/2015, 1400 AKS
Registration: N2791P
Aircraft: PIPER PA 18A
Aircraft Damage: Substantial
Defining Event: Fuel contamination
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal

Analysis

According to the pilot, the airplane departed the runway and climbed to 3000 feet above ground level. She reported that while maneuvering, the airplane lost engine power. After several attempts to restart the engine, the pilot made a forced landing on a highway bridge. She reported that during the landing roll, the airplane's right wing struck a sign that was affixed to the bridge.

According to the pilot, at the time of the accident, there were twenty gallons of fuel on board the airplane. She reported that the airframe and power plant mechanic removed approximately two cups of water from the fuel tanks after the accident in preparation for the airplane's recovery. The airplane sustained substantial damage to the right wing spar and aileron.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
Fuel contamination resulting in the loss of engine power, a forced landing on a highway, and subsequent right wing impact with highway signage. 

Findings

Aircraft
Fuel - Fluid condition (Cause)

Personnel issues
Aircraft control - Pilot (Cause)
Knowledge of equipment - Pilot

Environmental issues
Low temperature - Effect on equipment

Factual Information

History of Flight

Maneuvering
Fuel contamination (Defining event)
Loss of engine power (total)

Landing
Collision with terr/obj (non-CFIT)

Pilot Information

Certificate: Private
Age: 35, Female
Airplane Rating(s): Single-engine Land
Seat Occupied: Front
Other Aircraft Rating(s): None
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: 04/26/2013
Occupational Pilot: No
Last Flight Review or Equivalent: 06/27/2015
Flight Time:   (Estimated) 263.4 hours (Total, all aircraft), 206.3 hours (Total, this make and model), 263.4 hours (Pilot In Command, all aircraft), 0.5 hours (Last 90 days, all aircraft), 0.5 hours (Last 30 days, all aircraft), 0.5 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: PIPER
Registration: N2791P
Model/Series: PA-18A-105 SPECIAL
Aircraft Category: Airplane
Year of Manufacture:
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 18-4426
Landing Gear Type: Ski/wheel; Tailwheel
Seats: 2
Date/Type of Last Inspection: 01/06/2015, Annual
Certified Max Gross Wt.: 1499 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 3396.6 Hours as of last inspection
Engine Manufacturer: LYCOMING
ELT: C126 installed, not activated
Engine Model/Series: O-320-A2B
Registered Owner: OKONEK KELLIE L
Rated Power: 160 hp
Operator: OKONEK KELLIE L
Operating Certificate(s) Held: None 

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: ANC, 150 ft msl
Distance from Accident Site: 3 Nautical Miles
Observation Time: 2253 UTC
Direction from Accident Site: 210°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: Calm /
Turbulence Type Forecast/Actual: / None
Wind Direction:
Turbulence Severity Forecast/Actual: / N/A
Altimeter Setting: 29.17 inches Hg
Temperature/Dew Point: -10°C / -12°C
Precipitation and Obscuration:  No Obscuration; No Precipitation; Moderate - In the Vicinity - Fog
Departure Point: GIRDWOOD, AK (AQY)
Type of Flight Plan Filed: None
Destination: GIRDWOOD, AK (AQY)
Type of Clearance: None
Departure Time: 1345 AKS
Type of Airspace: Class G

Airport Information

Airport: GIRDWOOD (AQY)
Runway Surface Type: Asphalt; Snow
Airport Elevation: 150 ft
Runway Surface Condition: Dry; Snow
Runway Used: N/A
IFR Approach: None
Runway Length/Width:
VFR Approach/Landing: Forced Landing

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: 60.940000, -149.150000 (est)

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