ANC91LA121

NTSB accident investigation · Piper PA-18 · Anchorage, AK · August 9, 1991

Accident · No injuriesLimited investigationFinal report
Date
August 9, 1991, 13:22 local (21:22 UTC)
Place
Anchorage, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N2370HPiper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report March 10, 1993
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19910809033259A
Case key
5598

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

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Probable cause

The pilot's failure to maintain directional control of the airplane during the takeoff roll. Contributing to the accident was the pilot's weather evaluation misjudgment, the high wind, and rough water encountered during takeoff.

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 - on ground/waterTakeoff - roll/run
Terrain condition - water,roughFactor
Directional control - not maintainedPilot in commandCause
Weather condition - high windFactor
Weather evaluation - misjudgedPilot in commandFactor
Nose overTakeoff - roll/run

Analysis

The left wing began to rise during the takeoff run on the lake and the pilot lost directional control of the airplane. The airplane nosed over on its back and sank into 20 feet of water.

Aircraft

Registration
N2370H
Reported as
Piper PA-18
Category
Airplane
Serial number
18-7909178
Airframe hours
772
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Moeller, David A.
Registered owner
Moeller, David A.
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · September 5, 1990 · 16 hours before
Destination
NONE · Alexander Lake, AK
Airport
LHD · Lake Hood Seaplane, runway 13, 1,370 × 150 ft, water

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
41
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
471 total · 192 in this make and model · 288 as pilot in command · 26 in the last 90 days · 13 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 16 knots, gusting 24
Visibility
15 statute miles
Lowest ceiling
1,500 ft broken
Temperature
57 °F, dew point 50 °F
Altimeter
29.00 inHg
Observed at
ANC, 1 nm away

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 N2370H · 1

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