ANC13CA107

NTSB accident investigation · Piper PA 18-150 · Wasilla, AK · September 30, 2013

Accident · No injuriesData collectionFinal report
Date
September 30, 2013, 08:00 local (16:00 UTC)
Place
Wasilla, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Prior to flight
Aircraft
N40579Piper PA 18-150
Defining event
Prior to flight: Structural icing
Weather
Visual (VMC) · Day
Status
Completed · report April 1, 2014
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA Anchorage FSDO
FAA report
20130930021099A
Case key
88169

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 improper preflight inspection, and failure to remove heavy frost from the airplane prior to attempting a takeoff.

Findings · 4

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.

Inspection: preflight inspectionPersonnel issues › Task performance · PilotPiper PA-18-150: 4 casesAll aircraft: 551 casesProbable cause
Action: lack of actionPersonnel issues › Action/decision · PilotPiper PA-18-150: 4 casesAll aircraft: 792 casesProbable cause
Temp/humidity/pressure: conducive to structural icingEnvironmental issues › Conditions/weather/phenomena · Decision related to conditionPiper PA-18-150: 2 casesAll aircraft: 103 casesProbable cause
Object/animal/substance: poleEnvironmental issues › Physical environment · Contributed to outcomePiper PA-18-150: 3 casesAll aircraft: 142 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 attempting to takeoff from a public street, but the airplane would not climb, and struck a light pole, sustaining substantial damage to both wings and the fuselage. The pilot stated that he failed to remove heavy frost from the airplane prior to the takeoff attempt. He also stated that there were no preaccident mechanical malfunctions or failures that would have precluded normal operation.

Factual narrative

The pilot was attempting to takeoff from a public street, but the airplane would not climb, and struck a light pole, sustaining substantial damage to both wings and the fuselage. The pilot stated that he failed to remove heavy frost from the airplane prior to the takeoff attempt. He also stated that there were no preaccident mechanical malfunctions or failures that would have precluded normal operation.

Aircraft

Registration
N40579
Reported as
Piper PA 18-150 (A150)
Category
Airplane
Serial number
18-7509129
Built
1976
Airframe hours
5,991
Engine
Lycoming O-320 SERIES, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 10, 2013 · 210 hours before
Departed
Wasilla, AK
Destination
5NK · Naknek, AK

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
42
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
August 1, 2011
Seat
Front
Restraint
4-point
Flight hours
4,800 total · 4,500 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
20,000 ft broken
Temperature
28 °F, dew point 27 °F
Altimeter
29.44 inHg
Observed at
PAAQ, 8 nm away

Docket · 1

The files NTSB released with the investigation on March 13, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 345 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.