ANC10LA062

NTSB accident investigation · Consolidated Aeronautics Lake LA-4-200 · Skwentna, AK · July 18, 2010

Accident · Serious injuriesLimited investigationFinal report
Date
July 17, 2010, 19:30 local (Jul 18, 2010, 03:30 UTC)
Place
Skwentna, AK
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N8543HConsolidated Aeronautics Lake LA-4-200
Defining event
Landing-flare/touchdown: Abnormal runway contact
Weather
Visual (VMC) · Day
Status
Completed · report April 7, 2011
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA FSDO-03
FAA report
20100717041249A
Case key
76662

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's inadequate flare, which resulted in a nose-low impact with glassy water and a subsequent nose-over. Contributing to the accident was the pilot's diverted attention while landing.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot stated that he was performing touch-and-go practice takeoffs and landings in his seaplane in glassy water conditions. The first two landings were harder than normal and the airplane bounced. On the third landing, the airplane landed hard and nosed over. The pilot recalled that his airspeed during the approach was 60 knots and was descending at 150 feet-per-minute. He additionally stated that, after crossing the shoreline, he glanced down at the vertical speed indicator where his eyes remained focused during the impact with the water. He said that there were no preimpact mechanical problems with the airplane.

Factual narrative

On July 17, 2010, about 1930 Alaska daylight time, a Consolidated Aeronautics, Lake LA-4-200 amphibious airplane, N8543H, sustained substantial damage while doing touch-and-go landings on Hewett Lake, about 6 miles west of Skwentna, Alaska. The airplane was being operated by the pilot as a visual flight rules personal cross-country flight under Title 14, CFR Part 91, when the accident occurred. The solo commercial pilot received serious injuries. Visual meteorological conditions prevailed, and no flight plan was filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge on July 19, the pilot said he flew to Hewett Lake to visit some friends. He said after the visit, and prior to his returning home, he elected to do some touch-and-go landings on Hewett Lake. The pilot reported that the water was glassy, and the first two landings were harder than he would have liked, and the airplane bounced. He said on the third landing, the airplane landed hard and nosed over. He said he was able to escape the wreckage, inflate his vest, and he was picked up by boaters. The pilot said he made his approach at 60 knots airspeed and 150 feet per minute rate of descent. He said the wind was light, and the water was glassy. He said there were no mechanical problems with the airplane prior to the accident. In a written statement to the NTSB dated October 22, the pilot reported that "after crossing the shoreline, I glanced down at the VSI (vertical speed indicator)..., before I looked up, the airplane impacted the water."

Aircraft

Registration
N8543H
Reported as
Consolidated Aeronautics Lake LA-4-200
Category
Airplane
Serial number
1105
Airframe hours
1,850
Engine
Lycoming IO360 SER A&C, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Strother George C
Registered owner
Strother George C
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 1, 2010
Departed
Skwentna, AK
Destination
34AK · Palmer, AK

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
62
Injuries
Serious
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
May 29, 2010
Seat
Left
Flight hours
1,710 total · 358 in this make and model · 1,505 as pilot in command · 19 in the last 90 days · 2 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None

Docket · 1

The files NTSB released with the investigation on December 9, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 623 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.