ANC99LA054

NTSB accident investigation · Piper PA-18 · King Salmon, AK · April 22, 1999

Accident · No injuriesLimited investigationFinal report
Date
April 21, 1999, 22:10 local (Apr 22, 1999, 06:10 UTC)
Place
King Salmon, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N1389APiper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report April 20, 2000
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19990421003849A
Case key
46218

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. A factor associated with the accident was an inadvertent ground loop.

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/waterLanding - roll
Directional control - not maintainedPilot in commandCause
Ground loop/swerve - inadvertentPilot in commandFactor
Main gear collapsedLanding - roll

Analysis

The certificated private pilot was landing a tundra tire, tailwheel equipped airplane, on a paved dry runway. The pilot stated that the touchdown and the landing roll were uneventful, until the airplane's nose veered slightly to the left. He said he compensated by applying right rudder, but the airplane suddenly ground looped to the left. He stated that the right main landing gear collapsed, and the right wing collided with the runway during the ground loop. The airplane sustained substantial damage to the right wing, and right wing struts. The pilot noted that there were no preaccident mechanical anomalies with the airplane.

Factual narrative

On April 21, 1999, about 2210 Alaska daylight time, a tundra tire, tailwheel equipped Piper PA-18 airplane, N1389A, received substantial damage while landing on runway 29 at the King Salmon Airport, King Salmon, Alaska. The certificated private pilot, and the one passenger aboard were not injured. The airplane was being operated as a visual flight rules (VFR) cross-country flight under Title 14, CFR Part 91, when the accident occurred. Visual meteorological conditions prevailed, and a VFR flight plan was filed. The flight last departed Merrill Field, Anchorage, Alaska, about 1900, and the destination was the King Salmon Airport.

During a telephone conversation with the National Transportation Safety Board investigator-in-charge on April 22, the pilot stated that the touchdown and the landing roll were uneventful, until the airplane's nose veered slightly to the left. He said he compensated by applying right rudder, but the airplane suddenly ground looped to the left. He stated that the right main landing gear collapsed, and the right wing collided with the runway during the ground loop.

The airplane sustained substantial damage to the right wing, and right wing struts.

The pilot noted that there were no preaccident mechanical anomalies with the airplane.

Aircraft

Registration
N1389A
Reported as
Piper PA-18
Category
Airplane
Serial number
18-1220
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Roger A. Denny
Airworthiness certificate
Standard, Normal
Departed
MRI · Anchorage, AK
Flight plan
VFR
Airport
AKN · King Salmon, runway 29, 8,500 × 150 ft, asphalt

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
36
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
130 total · 20 in this make and model · 100 as pilot in command · 10 in the last 90 days · 10 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 5 knots
Visibility
10 statute miles
Lowest ceiling
7,000 ft overcast
Temperature
39 °F

FAA reports on this event · 1

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