ERA14CA225

NTSB accident investigation · Lake LA-4 · Chapin, SC · April 29, 2014

Accident · Minor injuriesData collectionFinal report
Date
April 29, 2014, 18:40 local (22:40 UTC)
Place
Chapin, SC
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N1029LLake LA-4
Defining event
Landing-flare/touchdown: Abnormal runway contact
Weather
Visual (VMC) · Day
Status
Completed · report September 2, 2014
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20140429005909A
Case key
89173

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 improper flare, which resulted in abnormal contact with the water and separation of the right pontoon..

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotLake LA-4: 2 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: landing flareAircraft › Aircraft oper/perf/capability · Incorrect use/operationLake LA-4: 1 caseAll aircraft: 1,285 casesProbable cause

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 of the amphibian airplane stated that the airplane was properly configured for landing on a lake, with the landing gear retracted and the flaps extended. The approach was normal; however, the pilot heard a loud bang immediately after touchdown and felt a lateral force in the cockpit. He then observed that the right wing pontoon had separated and he exited the cockpit before the airplane sank. Two witnesses were in a nearby boat and rescued the pilot. The witnesses reported that the pilot commented about the accident landing. He stated that it was only his fourth landing on the water and that the water was calm, which can affect depth perception. The witnesses added that the right wing pontoon contacted the water first, which spun the airplane. The airplane sank in an area of the lake that was approximately 120 feet deep. As of 60 days after the accident, the wreckage had not been located and recovered. The right pontoon was recovered. The pilot possessed a single-engine sea rating and reported 21 hours in the make and model airplane. He also reported 4,360 total hours of flight experience.

Factual narrative

The pilot of the amphibian airplane stated that the airplane was properly configured for landing on a lake, with the landing gear retracted and the flaps extended. The approach was normal; however, the pilot heard a loud bang immediately after touchdown and felt a lateral force in the cockpit. He then observed that the right wing pontoon had separated and he exited the cockpit before the airplane sank. Two witnesses were in a nearby boat and rescued the pilot. The witnesses reported that the pilot commented about the accident landing. He stated that it was only his fourth landing on the water and that the water was calm, which can affect depth perception. The witnesses added that the right wing pontoon contacted the water first, which spun the airplane. The airplane sank in an area of the lake that was approximately 120 feet deep. As of 60 days after the accident, the wreckage had not been located and recovered. The right pontoon was recovered.The pilot possessed a single-engine sea rating and reported 21 hours in the make and model airplane. He also reported 4,360 total hours of flight experience.

Aircraft

Registration
N1029L
Reported as
Lake LA-4
Category
Airplane
Serial number
272
Built
1963
Airframe hours
2,809
Engine
Lycoming O-360, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Jay E Seward II
Registered owner
Jay E Seward II
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 1, 2013
Departed
FDW · Winnsboro, SC
Destination
Chapin, SC
Equipment
Stall warning system

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
61
Injuries
Minor
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
April 17, 2014
Seat
Left
Restraint
3-point
Flight hours
4,360 total · 21 in this make and model · 2,837 as pilot in command · 25 in the last 90 days · 23 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 4 knots
Visibility
10 statute miles
Lowest ceiling
15,000 ft overcast
Temperature
81 °F, dew point 68 °F
Altimeter
29.87 inHg
Observed at
CAE, 19 nm away

Docket · 6

The files NTSB released with the investigation on August 13, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.9 MB 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.

Other investigations on N1029L · 2

Matched to the same aircraft by N-number and date.