ANC09LA035

NTSB accident investigation · Piper PA-18-135 · Palmer, AK · April 26, 2009

Accident · No injuriesLimited investigationFinal report
Date
April 25, 2009, 16:30 local (Apr 26, 2009, 00:30 UTC)
Place
Palmer, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3256BPiper PA-18-135
Defining event
Landing-flare/touchdown: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report April 22, 2010
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration (Operations)
FAA report
20090425025149A
Case key
73741

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 non-certificated pilot’s decision to attempt to "ski" atop a water-covered tidal area in an airplane equipped with over-sized main landing gear tires, resulting in a loss of control and a nose over.

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.

Performance/control parametersAircraft › Aircraft oper/perf/capability · Incorrect use/operationPiper PA-18-135: 1 caseAll aircraft: 1,269 casesProbable cause
Terrain: waterEnvironmental issues › Physical environment · Decision related to conditionPiper PA-18-135: 1 caseAll aircraft: 97 cases

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 uncertificated pilot was on a Title 14, CFR Part 91, local area flight in a tundra tire-equipped airplane. The pilot reported that after landing on a mud-covered tidal beach, while attempting to turn the airplane around for taxi, a gust of wind lifted the tail of the airplane, and it nosed over. The airplane sustained substantial damage to the left wing lift strut, fuselage, and rudder. The pilot noted that shortly after the accident he and some friends were able to right the airplane, and he flew it back to his home airport. Witnesses camped on a beach next to the tidal flats reported to the that the airplane was first seen flying recklessly, and very close to the water, then they saw the airplane "ski" across the water, with the airplane's main wheels touching the surface of the water. The witnesses said that after five or six touch-and-go “ski” landings on the water, of which they took a video, the airplane's main wheels struck a sand bar, and it nosed over in shallow water. When the witnesses arrived to check on the condition of the pilot, the pilot told the witnesses, in part: "Don't call the cops." The investigation revealed that the accident pilot's third-class medical had been administratively denied due to two previous convictions of driving while intoxicated (DWI) within the last 10 years. According to State court records the pilot was charged and convicted of DWI in 2000, 2002, and 2004. Additionally, about 8 month before the accident, the pilot was charged with a fourth DWI, which is a felony.

Factual narrative

On April 25, 2009, about 1630 Alaska daylight time, a tundra tire-equipped Piper PA-18-135 airplane, N3256B, sustained substantial damage when it nosed over during landing on water-covered tidal mud flats, about 6 miles south of Palmer, Alaska. The airplane was being operated as a visual flight rules (VFR) personal flight under the provisions of 14 Code of Federal Regulations Part 91, when the accident occurred. The sole occupant, the uncertificated pilot, was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the local area flight. The flight originated at the Wolf Lake Airport, Palmer, Alaska, about 1530. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on April 25, about 2030, the pilot related that after a successful landing on the mud-covered tidal flats, while he attempted to turn the airplane around for taxi, a gust of wind lifted the tail of the airplane, and it nosed over. The pilot reported that there were no preaccident mechanical problems with the airplane. He said that the airplane sustained no damage during the nose over, and shortly after the accident he and some friends were able to right the airplane, and he flew it back to the Wolf Lake Airport. The pilot said that he was a student pilot, with a third-class medical certificate. When the NTSB IIC asked the pilot for his most recent medical exam date, he responded by saying that he did not have his wallet with him, and he did not know the date of the exam. During a telephone conversation with the NTSB IIC on April 25, an Alaska state trooper that responded to the site said witnesses told him that just before the accident, they saw the airplane "ski" across the water, with the airplane's main wheels touching the surface of the water. The state trooper said that when he arrived on scene, the airplane had already been removed from the accident site, and had been hidden in trees and brush. The pilot was not at the accident site when the state trooper arrived. The state trooper said that an individual at the site provided him with photos of the airplane before the airplane was recovered. The photos show substantial damage to the airplane's left wing lift strut, fuselage, and rudder. During a telephone conversation with the NTSB IIC on April 26, a witness to the accident reported that he and family members were camped on the beach next to the tidal flats when, according to the witness, the airplane was first seen flying recklessly, and very close to the water. He said that as he and his family members watched, the airplane's large tundra tires touched down on the water, and the airplane appeared to "water-ski" across the surface of the water on the main landing gear wheels. The witness said that the accident airplane did five or six touch-and-go “ski” landings on the water. He said that on the accident touch-and-go landing, the airplane's main wheels struck a sand bar, and it nosedover in shallow water. When the witness arrived at the accident site to check on the condition of the pilot, the pilot told the witnesses, in part: "Don't call the cops." The witness said that about 45 minutes after the accident, a group of people arrived on site, and they turned the airplane over using an all terrain vehicle, then towed the airplane into the brush, out of sight, then left the area. The witness provided the NTSB and the Alaska State Troopers with a series of short video clips of the accident airplane as its main landing gear wheels skim across the water for several hundred feet. The last video clip shows the airplane nosed over on the tidal flats in shallow water. During a telephone conversation with the NTSB IIC on April 28, a representative from the Federal Aviation Administration (FAA) regional flight surgeon's office, Alaska Region, reported that the accident pilot's third-class medical certificate was administratively denied on August 1, 2008, due to two previous convictions of driving while intoxicated (DWI) within the last 10 years. According to information provided by the Alaska State Troopers on April 28, the pilot was charged and convicted of DWI in 2000, 2002, and 2004. Additionally, on August 30, 2008, the pilot was charged with a fourth DWI, which is a felony. According to the FAA, the pilot did not possess a current medical certificate or a student pilot's certificate at the time of the accident. The pilot did not submit an NTSB Pilot/Operator Accident Report form (6120.1) as required.

Aircraft

Registration
N3256B
Reported as
Piper PA-18-135
Category
Airplane
Serial number
18-3271
Engine
Lycoming O-290 SERIES, 140 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Edwin A. Stoltenberg
Registered owner
Edwin K. Stoltenberg
Airworthiness certificate
Standard, Normal
Departed
4AK6 · Palmer, AK
Destination
4AK6 · Palmer, AK
Flight plan
Unknown

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
Student pilot
Age
26
Injuries
None
Seat
Front
Flight hours
87 total

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 27 °F
Altimeter
30.22 inHg
Observed at
PAMR, 6 nm away

Docket · 1

The files NTSB released with the investigation on January 13, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 97 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.