ANC93LA186

NTSB accident investigation · Piper PA-18 · Pilot Point, AK · September 20, 1993

Accident · No injuriesLimited investigationFinal report
Date
September 20, 1993, 11:00 local (19:00 UTC)
Place
Pilot Point, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N6721LPiper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report June 30, 1994
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19930920035969A
Case key
2435

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 failed to adequately compensate for the wind conditions. A factor was the unfavorable wind.

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.

Loss of control - in flightTakeoff - initial climb
Compensation for wind conditions - inadequatePilot in commandCause
Weather condition - unfavorable windFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The Pilot said that just after liftoff from the water, and passing the edge of the lake, the airplane settled onto the tundra. One float attaching Point and the surrounding area on the fuselage were substantially damaged. The Pilot said he thought he might have encountered a wind change or shear.

Factual narrative

On September 20, 1993, at 1100 Alaska daylight time, a float equipped Piper PA-18 airplane, N6721L, operated by Dahle Air Service, Inc. of Anchorage, Alaska, crashed during takeoff from an unnamed lake located 22 miles southeast of Pilot Point, Alaska. The commercial pilot and the one passenger were not injured. The airplane was substantially damaged. The business flight was operating under 14 CFR Part 91 at the time. Visual meteorological conditions existed, and a company VFR flight plan was filed.

During a telephone interview with the pilot on September 22, 1993, he stated the following, in part: "I had just taken off and cleared the edge of the lake when the airplane just settled back down on the tundra. The winds were variable from the northwest to the southwest at about 15 gusting to 20 knots. I think I encountered a downdraft. When the airplane settled down on the floats, one float attaching point and the surrounding area of the fuselage was damaged."

Aircraft

Registration
N6721L
Reported as
Piper PA-18
Category
Airplane
Serial number
18-7409114
Airframe hours
1,919
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Operator
Dahle, Clyde M., doing business as Dahle Air Service
Registered owner
Dahle, Clyde M.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 10, 1993 · 35 hours before
Flight plan
Company VFR

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
48
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
2,940 total · 1,268 in this make and model · 2,907 as pilot in command · 35 in the last 90 days · 29 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 15 knots, gusting 20
Visibility
10 statute miles
Lowest ceiling
3,000 ft broken
Temperature
50 °F

FAA reports on this event · 1

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