ANC08LA075

NTSB accident investigation · Piper PA-18 · Skwentna, AK · June 22, 2008

Accident · Serious injuriesLimited investigationFinal report
Date
June 21, 2008, 16:20 local (Jun 22, 2008, 00:20 UTC)
Place
Skwentna, AK
Injuries
1 serious, 1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N5408YPiper PA-18
Defining event
Takeoff: Runway excursion
Weather
Visual (VMC) · Day
Status
Completed · report December 11, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-ANC FSDO 03
FAA report
20080621857899A
Case key
68292

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

On this page

Probable cause

The pilot's failure to maintain directional control during the takeoff roll and liftoff, which resulted in a collision with trees and the ground.

Findings · 3

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 parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18-150: 98 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-18-150: 160 casesAll aircraft: 9,295 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomePiper PA-18-150: 19 casesAll aircraft: 933 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 pilot was departing from a remote airstrip that was about 2,000 feet long, and about 40 feet wide. He indicated that the center of the airstrip was gravel, with 8 inch-high grass along the edges. He said that during the takeoff roll and after the tailwheel came up, the airplane pulled to the right, possibly due to the right main landing gear encountering the grass edge. The airplane lifted off to about 15 feet while drifting to the right, and the right wingtip struck trees that were along the edge of the airstrip.

Factual narrative

On June 21, 2008, about 1620 Alaska daylight time, a tundra tire-equipped Piper PA-18 airplane, N5408Y, sustained substantial damage when it collided with trees during takeoff initial climb from a remote airstrip, about 2.5 miles south-southwest of Skwentna, Alaska. The airplane was being operated by the pilot as a visual flight rules (VFR) cross-country personal flight under Title 14, CFR Part 91, when the accident occurred. The private certificated pilot received serious injuries; the sole passenger was not injured. Visual meteorological conditions prevailed. The flight was en route to Merrill Field, Anchorage, Alaska, and no flight plan was filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on June 23, the pilot reported that he was departing to the west from the Tal River Lodge, located on the Talachulitna River. The airstrip was oriented east/west, and was about 2,000 feet long, and about 40 feet wide. The pilot indicated that the center of the airstrip was gravel, with 8 inch-high grass along the edges. He said that during the takeoff roll and after the tailwheel came up, the airplane pulled to the right, possibly due to the right main landing gear encountering the grass edge. The airplane lifted off to about 15 feet while drifting to the right, and the right wingtip struck trees that were along the edge of the airstrip. The airplane nosed down about 400 feet from the initial takeoff point, and received structural damage to the wings, fuselage, vertical stabilizer, and rudder.

Aircraft

Registration
N5408Y
Reported as
Piper PA-18
Category
Airplane
Serial number
18-8171
Airframe hours
3,986
Engine
Lycoming O-320A2B, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Sherman Reynolds
Registered owner
Sherman G. Reynolds
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 4, 2008 · 19 hours before
Departed
Skwentna, AK
Destination
PAMR · Anchorage, AK
Airport
Tal River Lodge, runway 27, 2,000 × 40 ft, gravel

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
66
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Front
Flight hours
136 total · 121 in this make and model · 77 as pilot in command · 19 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F

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 N5408Y · 7

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

NTSB GAA19CA564Accident · No injuriesData collectionFinal reportSkwentna, AKThe pilot's improper decision to depart from an off-airport surface covered with standing water, which resulted in a noseover.Sep 23, 2019 · Substantial damageNTSB GAA16CA440Accident · No injuriesData collectionFinal reportPalmer, AKThe pilot's excessive brake application during the landing roll resulting in a nose over.Aug 19, 2016 · Substantial damageNTSB ANC05CA084Accident · No injuriesData collectionFinal reportPamler, AKThe student pilot's failure to obtain/maintain adequate airspeed during takeoff-initial climb, which resulted in an in-flight collision with trees. Factors associated with the accident are a tailwind and diminished braking capability.Jun 11, 2005 · Substantial damageNTSB ANC02LA027Accident · No injuriesLimited investigationFinal reportChickaloon, AKThe inadequate supervision of the student pilot by the instructor. Factors associated with the accident are the snow-covered runway and the loss of directional control by the student pilot.Mar 28, 2002 · Substantial damageNTSB ANC84LA102Accident · Minor injuriesLimited investigationFinal reportBear Creek, AKThe acft crashed into a river bank during an attempted go-around. The plt reported that upon initial touchdown the acft bounced and he applied full throttle. The engine reportedly responded with a maximum RPM of about 1600. The acft bouncedagain on the…Jun 24, 1984 · Substantial damageNTSB ANC74DAG66Accident · Minor injuriesClosedNondalton, AKOct 1, 1973 · Substantial damageNTSB ANC68F0023Accident · Serious injuriesClosedMcgrath, AKMar 6, 1967 · Substantial damage