ANC13CA101

NTSB accident investigation · Cessna 170B · Iliamna, AK · September 14, 2013

Accident · No injuriesData collectionFinal report
Date
September 13, 2013, 20:00 local (Sep 14, 2013, 04:00 UTC)
Place
Iliamna, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N2736CCessna 170B
Defining event
Landing-landing roll: Nose over/nose down
Weather
Visual (VMC) · Day
Status
Completed · report December 2, 2013
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA/FSDO
FAA report
20130913019089A
Case key
88053

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 inadvertent encounter with a mound while landing on a remote airstrip.

Findings · 1

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.

Terrain: rough terrainEnvironmental issues › Physical environment · Effect on operationCessna 170B: 4 casesAll aircraft: 442 casesProbable cause

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 of a tailwheel-equipped airplane reported that he was landing on a remote airstrip. During the landing roll, a gust of wind forced the airplane slightly right of centerline about midfield. The right main landing gear then contacted an approximate 30-degree upsloping hummock (mound). The right main tire burst and the right main wheel imbedded in the mound. The airplane subsequently pivoted forward and left, with the left wing contacting the ground, before coming to rest upright. The impact resulted in substantial damage to the left wing. The pilot added that with the exception of the right main tire burst, there were no mechanical malfunctions or failures of the airplane.

Factual narrative

The pilot of a tailwheel-equipped airplane reported that he was landing on a remote airstrip. During the landing roll, a gust of wind forced the airplane slightly right of centerline about midfield. The right main landing gear then contacted an approximate 30-degree upsloping hummock (mound). The right main tire burst and the right main wheel imbedded in the mound. The airplane subsequently pivoted forward and left, with the left wing contacting the ground, before coming to rest upright. The impact resulted in substantial damage to the left wing. The pilot added that with the exception of the right main tire burst, there were no mechanical malfunctions or failures of the airplane.

Aircraft

Registration
N2736C
Reported as
Cessna 170B
Category
Airplane
Serial number
26280
Built
1954
Airframe hours
3,872
Engine
Franklin 6A-350-C1, 220 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Poirier Dennis L
Registered owner
Poirier Dennis L
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 20, 2013 · 32 hours before
Departed
Iliamna, AK
Destination
Iliamna, AK
Equipment
Stall warning system

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
53
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Seat
Left
Restraint
3-point
Flight hours
892 total · 608 in this make and model · 862 as pilot in command · 30 in the last 90 days · 15 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
100° at 11 knots
Visibility
10 statute miles
Lowest ceiling
2,700 ft broken
Temperature
52 °F, dew point 48 °F
Altimeter
29.75 inHg
Observed at
ILI, 53 nm away

Docket · 2

The files NTSB released with the investigation on November 20, 2013, on NTSB’s docket system: statements, records, photos and specialists’ reports. 492 KB in all.

FAA reports on this event · 1

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