ANC03LA027

NTSB accident investigation · Piper PA-18-150 · Soldotna, AK · February 11, 2003

Accident · No injuriesLimited investigationFinal report
Date
February 11, 2003, 12:00 local (16:00 UTC)
Place
Soldotna, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N4492APiper PA-18-150
Weather
Visual (VMC) · Day
Status
Completed · report July 23, 2003
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Anchorage, FSDO-03
FAA report
20030211002239A
Case key
56484

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 NTSB’s determination of the probable cause, and any contributing factors.

The pilot's selection of unsuitable terrain for takeoff, and his failure to maintain aircraft control which resulted in a nose over. A factor contributing to the accident was standing puddles of water on the frozen lake.

Analysis

The pilot said that prior to takeoff he walked a large portion of the frozen lake to check its suitability for use. He said although recent rain left about 2 inches of standing water on the ice-covered surface of the lake, he felt the lake was suitable for takeoff. The pilot said that during the takeoff roll, the tail lifted and transferred the weight of the airplane to the main landing gear. The main wheels then encountered water deeper than he expected, and the airplane nosed over. The airplane received wing and lift strut damage during the accident.

Factual narrative

On February 11, 2003, about 1200 Alaska standard time, a wheel-equipped Piper PA-18-150 airplane, N4492A, sustained substantial damage when it encountered puddles of standing water during the takeoff roll, and nosed over on Longmare Lake, about 5 miles east of Soldotna, Alaska. The airplane was being operated by the pilot as a visual flight rules (VFR) local personal flight under Title 14, CFR Part 91, when the accident occurred. The solo private pilot was not injured. Visual meteorological conditions prevailed, and no flight plan was filed.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on February 11, the pilot said that prior to takeoff he walked a large portion of the frozen lake to check its suitability for use. He said although recent rain left about 2 inches of standing water on the ice-covered surface of the lake, he felt the lake was suitable for takeoff. The pilot said during the takeoff roll, the airplane encountered standing water deeper than he expected. He said as the tail lifted and transferred the weight of the airplane to the main landing gear, the main wheels encountered deeper water, and the airplane nosed over.

The pilot said there were no preaccident mechanical anomalies with the airplane. The airplane received wing and lift strut damage during the accident.

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.

On ground/water encounter with terrain/waterTakeoff - roll/run
Terrain condition - water,frozen
Terrain condition - waterFactor
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Nose overTakeoff - roll/run

Aircraft

Registration
N4492A
Reported as
Piper PA-18-150
Category
Airplane
Serial number
18-4861
Airframe hours
5,402
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Daniel L. Deraeve
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 22, 2002 · 20 hours before
Departed
Soldotna, AK
Destination
Soldotna, 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
49
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Last flight review
January 27, 2003
Seat
Front
Flight hours
317 total · 237 in this make and model · 227 as pilot in command · 10 in the last 90 days · 10 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Temperature
39 °F

Docket · 1

The files NTSB released with the investigation on May 20, 2003, on NTSB’s docket system: statements, records, photos and specialists’ reports. 662 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.