ANC98LA136

NTSB accident investigation · Cessna 170A · North Pole, AK · August 24, 1998

Accident · No injuriesLimited investigationFinal report
Date
August 23, 1998, 16:00 local (Aug 24, 1998, 00:00 UTC)
Place
North Pole, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9754ACessna 170A
Weather
Visual (VMC) · Day
Status
Completed · report February 16, 2001
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19980823028189A
Case key
43910

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/swerve during the landing roll.

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
Ground loop/swerve - inadvertentPilot in commandCause
Main gear collapsedLanding - roll

Analysis

The student pilot reported he was on a solo flight to a local gravel-covered airstrip. During the landing roll, he lost control of the tail wheel equipped airplane, and it ground looped/swerved to the left side of the runway. The right main landing gear collapsed, and the right wing struck the ground. The student pilot noted in his report to the NTSB that there were no preaccident mechanical problems with the airplane.

Factual narrative

On August 23, 1998, about 1600 Alaska daylight time, a wheel equipped Cessna 170A airplane, N9754A, sustained substantial damage while landing at the Bradley Sky Ranch airstrip, North Pole, Alaska. The solo student pilot was not injured. The 14 CFR Part 91 local instructional flight operated in visual meteorological conditions without a flight plan. The flight last departed Fairbanks International Airport on August 23, time unknown.

FAA Fairbanks Flight Standards inspectors interviewed the pilot August 28. The FAA inspectors reported the pilot told them he was practicing landings in calm wind conditions at the Bradley Sky Ranch airstrip. The student pilot related that shortly after touchdown on runway 15, he lost directional control, the airplane ground looped/swerved to the left, and the right main landing gear collapsed.

In the pilot's written statement to the NTSB, he reported a crosswind caught the left side of the airplane while landing, and pushed it off the right side of the runway, collapsing the right main landing gear, and striking the right wing on the ground. He did not indicate the estimated direction or velocity of the wind.

At 1553, wind conditions at Fairbanks International Airport,16 miles west of the accident site, were reported to be from 124 degrees magnetic, at 8 knots.

An inspection of the airplane by an FAA airworthiness inspector disclosed substantial damage to the right main landing gear's gear box, the bottom of the airplane's fuselage, and the aileron on the right wing.

The pilot noted in his report to the NTSB that there was no preimpact mechanical malfunction with the airplane.

Aircraft

Registration
N9754A
Reported as
Cessna 170A
Category
Airplane
Serial number
19215
Airframe hours
1,660
Engine
Continental C-145-2, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Patrick D. Jordan
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 1, 1998 · 42 hours before
Departed
FAI · Fairbanks, AK
Destination
95Z
Airport
Bradley Sky Ranch, runway 15, 4,100 × 80 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
37
Certificate
Student
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
28 total · 22 in this make and model · 5 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
134° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 43 °F
Altimeter
29.00 inHg
Observed at
PAF, 16 nm away

FAA reports on this event · 1

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