ANC98LA073

NTSB accident investigation · Lake LA-4 · Saint Mary'S, AK · June 15, 1998

Accident · No injuriesLimited investigationFinal report
Date
June 14, 1998, 16:30 local (Jun 15, 1998, 00:30 UTC)
Place
Saint Mary'S, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N19AKLake LA-4
Weather
Visual (VMC) · Day
Status
Completed · report May 19, 1999
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19980614020739A
Case key
3158

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 diverted attention during takeoff, and his failure to maintain a proper climb rate. A factor associated with the accident was the presence of birds.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with objectTakeoff - initial climb
Object - bird(s)Factor
Diverted attentionPilot in commandCause
Proper climb rate - not maintainedPilot in commandCause
Object - tree(s)

Analysis

The certificated commercial pilot was departing from a river after a day of fishing. The pilot reported that just after takeoff, about 15 feet above the water, two ducks flew into the path of the departing airplane, distracting his attention. The pilot stated that the birds passed on the right side of the airplane, about 6 feet from the windscreen. The next thing the pilot recalls was seeing trees that filled his entire field of view. The airplane's left wing sponson collided with a stand of trees, pivoted the airplane 180 degrees to the left, and the airplane settled into a larger stand of trees. The airplane sustained substantial damage to the wings and fuselage.

Factual narrative

On June 14, 1998, about 1630 Alaska daylight time, a Lake LA-4 amphibious airplane, N19AK, sustained substantial damage during takeoff from a river, about 10 miles northeast of Saint Mary's, Alaska. The airplane was being operated as a visual flight rules (VFR) personal flight under Title 14, CFR Part 91, when the accident occurred. The certificated commercial pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed, and no flight plan was filed. The flight originated at the Saint Mary's Airport, about 1050.

In his written statement to the NTSB, the pilot reported that he was departing from a river after a day of fishing. He stated that just after takeoff, about 15 feet above the water, two ducks flew into the path of the departing airplane, distracting his attention. He said that the ducks were headed in the same direction, and traveling at about the same airspeed as the departing airplane. He reported that both ducks passed from left to right, about 6 feet from the airplane's windscreen. The pilot stated that after he was assured that the ducks would clear the airplane's propeller, he turned his attention back to the takeoff. He stated that the next thing he remembered was his "forward vision being filled by trees."

The airplane's left wing sponson collided with a stand of trees, pivoted the airplane 180 degrees, and the airplane settled into a larger stand of trees. The airplane sustained substantial damage to the wings and fuselage.

The pilot indicated that there were no preimpact mechanical difficulties with the airplane.

Aircraft

Registration
N19AK
Reported as
Lake LA-4
Category
Airplane
Serial number
380
Airframe hours
2,290
Engine
Lycoming O-360-A1A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Allen K. Young
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 1, 1998 · 40 hours before
Departed
KSM · 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
58
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
12,000 total · 2,000 in this make and model · 11,800 as pilot in command · 199 in the last 90 days · 109 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 8 knots, gusting 11
Visibility
30 statute miles
Lowest ceiling
3,500 ft broken
Temperature
52 °F

FAA reports on this event · 1

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