ANC98LA077

NTSB accident investigation · Piper PA-18-160 · Anchorage, AK · June 18, 1998

Accident · No injuriesLimited investigationFinal report
Date
June 17, 1998, 17:30 local (Jun 18, 1998, 01:30 UTC)
Place
Anchorage, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N3684ZPiper PA-18-160
Weather
Visual (VMC) · Day
Status
Completed · report May 19, 1999
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19980617014239A
Case key
3162

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 correct engine/propeller torque and P factor, and the subsequent loss of directional control during the takeoff roll. Factors associated with the accident are the narrow, confined, takeoff area, and bordering high vegetation.

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/waterTakeoff - roll/run
Directional control - not maintainedPilot in commandCause
Torque/p-factor - not correctedPilot in commandCause
On ground/water encounter with terrain/waterTakeoff - roll/run
Airport facilities,runway/landing area condition - high vegetationFactor
Airport facilities,runway/landing area condition - congested/confined areaFactor

Analysis

The pilot reported she was attempting to takeoff from a narrow, remote, airstrip bordered by willows and brush. She said she lost directional control during the takeoff roll, and the left wing struck willows alongside the airstrip. The airplane subsequently went into the willows and brush, and received substantial damage. The pilot told an NTSB investigator the cause of the accident was '...pilot error; I didn't use enough right rudder, and the torque got me.'

Factual narrative

On June 17, 1998, about 1730 Alaska daylight time, a wheel equipped Piper PA-18-160 airplane, N3684Z, sustained substantial damage during a takeoff attempt from a private airstrip located adjacent to Alexander Creek, Alaska, which is approximately 35 miles northwest of Anchorage, Alaska. The private pilot/airplane owner and the one passenger aboard, the pilot's daughter, reported no injuries. The Title 14, CFR Part 91 flight operated in visual meteorological conditions. No flight plan was filed. The intended destination was Talkeetna, Alaska.

During a telephone conversation with the NTSB investigator-in-charge on June 18 at 1330, the pilot related she was attempting to takeoff from a narrow, private airstrip known locally as Roy's Airstrip. She said the airstrip is closely bordered by willows and other small trees. During the takeoff roll, the airplane veered to the left, and collided with brush. The pilot said the collision pulled the airplane further off the runway, and deeper into the brush. She said there were no preaccident mechanical difficulties with the airplane, and that the cause of the accident was "...pilot error; I didn't use enough right rudder, and the torque got me."

According to the pilot, the left wing's rear lift strut was damaged and needed replacement, and both wings were dented, with possible damage to internal wing ribs.

Aircraft

Registration
N3684Z
Reported as
Piper PA-18-160
Category
Airplane
Serial number
18-7416
Airframe hours
2,521
Engine
Lycoming O-320-B2B, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Flora A. Robinson
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 15, 1998 · 8 hours before
Destination
TKA · Talkeetna, AK
Airport
Roy'S Strip, runway 18, 1,000 × 30 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
43
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
300 total · 155 in this make and model · 265 as pilot in command · 8 in the last 90 days · 8 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 6 knots
Visibility
60 statute miles
Lowest ceiling
None
Temperature
64 °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 N3684Z · 3

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