ANC00LA112

NTSB accident investigation · Piper PA-18 · Mcgrath, AK · September 2, 2000

Accident · No injuriesLimited investigationFinal report
Date
September 2, 2000, 08:00 local (16:00 UTC)
Place
Mcgrath, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N10572Piper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report May 18, 2001
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
20000902042319A
Case key
50986

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 inadequate removal of frost from the airplane, and the inadvertent stall during takeoff. A factor was wind gusts.

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
Weather condition - gustsFactor
Stall - inadvertentPilot in commandCause
Ice/frost removal from aircraft - inadequatePilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot told the NTSB investigator during a telephone interview on September 2, that during his preflight he noted frost on the wings and tail section of the airplane. He described removing the frost with a rope, and he believed he had adequately cleaned the lifting surfaces. The pilot said the airplane climbed to between five and ten feet above the off airport gravel bar, and then the right wing stalled. He said the right wing struck the ground and the airplane cartwheeled. The pilot said he believed frost on the airplane's wings caused the stall. The pilot wrote in his NTSB pilot/operator report on September 10, that the winds were gusty at the time of the accident. He wrote that as soon as the airplane lifted off, a gust 'caught the aircraft and forced the right wing down.' The airplane sustained substantial damage to the right wing, tail assembly, and empennage.

Factual narrative

On September 2, 2000, about 0800 Alaska daylight time, a Piper PA-18 tundra tire equipped airplane, N10572, sustained substantial damage when it collided with terrain during takeoff from an off airport gravel bar about 86 miles east-southeast of McGrath, Alaska, at 62 degrees, 01 minutes north latitude, 153 degrees, 19 minutes west longitude. The solo private pilot was not injured. The flight was conducted under 14 CFR Part 91, as a personal flight, returning to Anchorage, Alaska. Visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed.

The pilot told the NTSB investigator-in-charge during a telephone interview on September 2, that during his preflight he noted frost on the wings and tail section of the airplane. He described removing the frost with a rope, and he believed he had adequately cleaned the lifting surfaces. He stated the airplane had about 32 gallons of fuel, and 75 pounds of survival gear on board. The pilot said the airplane climbed to between five and ten feet above the ground, and then the right wing stalled. He said the right wing struck the ground and the airplane cartwheeled. The pilot stated that he believed frost on the airplane's wings caused the stall. The airplane sustained substantial damage to the right wing, tail assembly, and empennage.

The pilot wrote in his NTSB pilot/operator report on September 10, that the winds were gusty at the time of the accident. He wrote that as soon as the airplane lifted off, a gust "caught the aircraft and forced the right wing down."

Aircraft

Registration
N10572
Reported as
Piper PA-18
Category
Airplane
Serial number
933
Airframe hours
2,500
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Wayne E. Drumm
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 1, 2000 · 20 hours before
Destination
MRI · Anchorage, 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
52
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
800 total · 750 in this make and model · 26 in the last 90 days · 26 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
45 °F

FAA reports on this event · 1

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