ANC99LA112

NTSB accident investigation · Cessna 170B · Wasilla, AK · July 1, 1999

Accident · No injuriesLimited investigationFinal report
Date
June 30, 1999, 17:00 local (Jul 1, 1999, 01:00 UTC)
Place
Wasilla, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N2806CCessna 170B
Weather
Visual (VMC) · Day
Status
Completed · report June 23, 2000
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19990630023059A
Case key
47158

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 student pilot's inadvertent ground loop during the takeoff roll. A factor in this accident was the a left crosswind.

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
Weather condition - crosswindFactor
Ground loop/swerve - inadvertentPilot in commandCause
Main gear collapsedTakeoff - roll/run

Analysis

The solo student pilot was attempting to takeoff with a 10 knot left crosswind. He told the NTSB investigator-in-charge the airplane's nose initially swerved right. The pilot said he overcorrected, and the 29 inch tundra tires grabbed the warm, dry, newly surfaced asphalt. The airplane ground looped to the left, collapsing the right main landing gear assembly, and damaging the right wing. The pilot had accumulated 24 hours of total flight experience at the time of the accident.

Factual narrative

On June 30, 1999, about 1700 Alaska daylight time, a tundra tire equipped Cessna 170B airplane, N2806C, sustained substantial damage when it ground looped during takeoff from the New Wasilla Airport, Wasilla, Alaska. The solo student pilot was not injured. The flight was conducted under 14 CFR Part 91 as a Visual Flight Rules (VFR) solo training flight. Visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed.

The pilot told the NTSB investigator-in-charge (IIC), during a telephone interview on August 12, that during the initial takeoff from runway 21, the airplane's nose initially swerved right. The pilot said he overcorrected, the 29 inch by 11 inch tires grabbed the warm, dry, newly surfaced asphalt, and the airplane ground looped to the left. The right wingtip struck the runway, the right main landing gear support structure failed, and the right main landing gear assembly collapsed. The pilot described a 90 degree left crosswind of 10 knots. Runway 21 measures 3,700 feet long by 75 feet wide. The pilot had accumulated about 24 hours of total flight experience, all in the accident airplane, at the time of the accident.

Aircraft

Registration
N2806C
Reported as
Cessna 170B
Category
Airplane
Serial number
26349
Airframe hours
6,844
Engine
Continental O-300, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Robert W. Cellars
Registered owner
Charles Morris
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 15, 1999
Departed
IYS
Airport
IYS · New Wasilla, runway 21, 3,700 × 75 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
44
Certificate
Student
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
24 total · 24 in this make and model · 24 as pilot in command · 24 in the last 90 days · 24 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
120° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °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 N2806C · 2

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