Friday, June 22, 2018

Loss of Control on Ground: Cessna 170B, N4427B, accident occurred June 21, 2018 at Lake Hood Seaplane Base (PALH), Anchorage, Alaska

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

Aviation Accident Final Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Aviation Accident Data Summary - National Transportation Safety Board:

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


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.


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

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
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)

A floatplane had a rough landing at Lake Hood Seaplane Base in Anchorage around 10:30 a.m. Thursday, airport police say.

The pilot wasn't hurt, Ted Stevens Anchorage International Airport police Sgt. Brad Skupnik said.

"She was coming in. The landing was fine, but the plane veered over," Skupnik said. "She ran up onto the bank. It's pretty minor."

The impact damaged both floats and the right wingtip of the Cessna 170B, he said.

The pilot took off from Hewitt Lake, about 5 miles northwest of Skwentna, a federal investigator said.

The plane ended up on the bank of the west water lane of the airport, according to Shawn Williams, the National Transportation Safety Board investigator looking into the cause of the crash.

Original article can be found here ➤

No injuries were reported Thursday morning after a floatplane ran ashore at Anchorage’s Lake Hood Seaplane Base.

Airport Police and Fire Chief Jesse Davis said initial reports that a single-engine floatplane had crashed came in at about 10:30 a.m.

Airport Police and Fire Sgt. Brad Skupnik said the pilot was unhurt in the incident, which occurred during a landing.

“She landed just fine, and then she said the plane veered over to the left (and) ran up on the bank,” Skupnik said.

It wasn’t clear why the plane veered off course, but Skupnik said there was “nothing in the water” on the lake.

Flight operations at Lake Hood were briefly shut down during the response, but Skupnik said the lake was soon reopened to aircraft. Runways at the airstrip were set to reopen once a crane lifted the plane and put it on a truck for transport.

A National Transportation Safety Board investigator was also enroute to the scene, according to NTSB Alaska chief Clint Johnson.

The incident comes a week after a fatal June 13 midair collision over the Susitna River, in which surviving pilot Bruce Markwood was able to land at Lake Hood's airstrip. The other pilot, James Poelman of Wasilla, crashed into the river and died.

Story and video ➤

ANCHORAGE (KTUU) - A plane crash early Thursday drew response form multiple agencies when the aircraft, a small float plane, "veered violently" upon landing.

According to Sgt. Brad Skupnik with Airport Police and Fire, the pilot and sole occupant was not injured when the plane crashed. The female pilot had been on a roughly 40 minute trip prior to the crash.

"It was coming in for a landing, and landed just fine, but then violently veered off course when it landed and sustained damage," Skupnik said. It is not yet known what made the plane veer into the nearby bank.

The plane, with a tail number of N4427B, sustained damage to both of its floats, but the woman was reportedly able to walk away without injury.

The floats were too damaged to taxi, so it had to be airlifted out of the water by a crane and put on a flatbed truck.

National Transportation Safety Board spokesperson Clint Johnson said that they had investigators present Thursday morning to investigate the finer details of the crash.

Original article can be found here ➤

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