WPR11LA136

NTSB accident investigation · Piper PA18 · Twin Falls, ID · February 16, 2011

Accident · Minor injuriesLimited investigationFinal report
Date
February 16, 2011, 08:30 local (15:30 UTC)
Place
Twin Falls, ID
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N7153ZPiper PA18
Defining event
Standing-engine(s) operating: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report January 31, 2013
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
FAA FSDO
FAA report
20110216009669A
Case key
78371

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 failure to compensate for the wind, which resulted in the airplane being blown over after completion of the landing roll.

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.

Action: incorrect action selectionPersonnel issues › Action/decision · PilotPiper PA-18-150: 3 casesAll aircraft: 397 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationPiper PA-18-150: 15 casesAll aircraft: 594 cases
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationPiper PA-18-150: 34 casesAll aircraft: 1,199 cases
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-18-150: 160 casesAll aircraft: 9,295 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 was completing multiple check rides in various airplanes that were scheduled over a couple of days. He stated that the wind was too strong the first day to complete the check ride in the accident airplane. On the second day, the pilot and the check airman departed with the wind from 180 degrees at 18 knots, gusting to 22 knots. After completing some air work, they returned for landing, and the wind had increased to 33 knots with gusts to 39 knots. The first landing attempt resulted in a go-around. The pilot successfully landed on the second attempt, and came to a full stop on the runway centerline. However, with the brakes set and the engine idling, the airplane was blown over by a quartering tail wind and came to rest inverted.

Factual narrative

On February 16, 2011, about 0830 mountain standard time, a Piper PA-18-150, N7153Z, nosed over during landing at Twin Falls, Idaho. The owner/pilot was operating the airplane under the provisions of 14 Code of Federal Regulations (CFR) Part 135. The airline transport pilot and the Federal Aviation Administration (FAA) airline transport pilot rated check airman sustained minor injuries; the airplane sustained substantial damage to the rudder and vertical stabilizer. The local check flight departed Twin Falls about 0800. Visual meteorological conditions prevailed, and no flight plan had been filed. The pilot was completing a Part 135.293(b) check ride, which was required yearly. Multiple check rides in various airplanes, including an oral and pilot record’s check, were scheduled over a 3-day period, but was eventually reduced to 2 days. The pilot stated that the winds were too strong the first day to complete the check ride in the accident airplane. On the second day, the pilot and check airman noted that the wind at the time of departure was from 180 degrees at 18 knots gusting to 22 knots on runway 25. After completing air work, they returned for landing. The pilot stated that during the flight, the wind had increased to 33 knots with gusts to 39 knots. The first landing attempt resulted in a go-around. The pilot successfully landed on the second attempt, and came to a full stop on the runway centerline. With the brakes set and the engine idling, the airplane was blown over by a quartering tail wind. The pilot stated that weather had caused delays on two previous occasions, and he lived in a different state than the check airman. He decided that he wanted to get the check rides done so that he could return home. His recommendation was that he should have cancelled the check ride again, and scheduled it another day.

Aircraft

Registration
N7153Z
Reported as
Piper PA18 (150)
Category
Airplane
Serial number
18-7266
Airframe hours
1,850
Engine
Lycoming O-320, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
Mike Walker
Registered owner
Mike Walker
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 30, 2010
Departed
TWF · Twin Falls, ID
Destination
TWF · Twin Falls, ID
Airport
TWF · Twin Falls Joslin Field, runway 25, 8,703 × 150 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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
65
Injuries
Minor
Certificates
Airline transport, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Seat
Front
Flight hours
43,000 total · 40 in the last 90 days · 10 in the last 30 days · 7 in the last 24 hours
Role
Check pilot
Age
31
Injuries
Minor
Certificates
Flight instructor, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2
Seat
Front

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 18 knots, gusting 25
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 25 °F
Altimeter
29.45 inHg
Observed at
KTWF

Docket · 2

The files NTSB released with the investigation on November 29, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.2 MB 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.

Other investigations on N7153Z · 2

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