ANC14CA029

NTSB accident investigation · Piper PA 18-105 Special · Anchorage, AK · May 26, 2014

Accident · No injuriesData collectionFinal report
Date
May 26, 2014, 12:00 local (20:00 UTC)
Place
Anchorage, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N234TPiper PA 18-105 Special
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report October 9, 2014
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
20140526008699A
Case key
89274

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 loss of control of the airplane during landing roll on a rough, grass airstrip in gusting wind.

Findings · 5

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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18-105 SPECIAL: 4 casesAll aircraft: 3,958 casesProbable cause
Terrain: rough terrainEnvironmental issues › Physical environment · Contributed to outcomePiper PA-18-105 SPECIAL: 2 casesAll aircraft: 442 cases
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationPiper PA-18-105 SPECIAL: 2 casesAll aircraft: 1,199 cases
Object/animal/substance: aircraftEnvironmental issues › Physical environment · Contributed to outcomePiper PA-18-105 SPECIAL: 1 caseAll aircraft: 116 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 reported that the windsock indicated wind from 130 degrees at 15 to 20 knots and that he entered a left pattern for runway 13. The pilot decided to go around after briefly touching down during the first approach, which he described as "turbulent with strong thermal activity on 1/4 mile final" with wind gusts during landing. He stated that the second approach was more comfortable, and the airplane touched down within the first 100 feet. The pilot stated that he flew a faster than normal final segment and touchdown due to the wind and turbulence with the intentions of performing a wheel landing, which he described as his normal procedure for the airstrip in such conditions. He stated that, during the landing, the tires bounced up about 6 to 8 inches on the frost heaves (which he also described as normal for the airstrip), and then the right wing lifted to what felt like about 2 feet. The pilot applied aileron and rudder corrections and applied the brakes during the landing roll, but the airplane moved the left of the airstrip centerline and collided with two parked airplanes. The pilot noted that he has flown into the airstrip for 21 years in all conditions and did not feel uncomfortable with the landing conditions. The pilot reported no mechanical malfunction of the airplane. He said that he had recent experience in the airplane but noted that it may differ some from his own airplane in how it reacts to flight control inputs.

Factual narrative

The pilot reported that the windsock indicated wind from 130 degrees at 15 to 20 knots and that he entered a left pattern for runway 13. The pilot decided to go around after briefly touching down during the first approach, which he described as "turbulent with strong thermal activity on 1/4 mile final" with wind gusts during landing. He stated that the second approach was more comfortable, and the airplane touched down within the first 100 feet. The pilot stated that he flew a faster than normal final segment and touchdown due to the wind and turbulence with the intentions of performing a wheel landing, which he described as his normal procedure for the airstrip in such conditions. He stated that, during the landing, the tires bounced up about 6 to 8 inches on the frost heaves (which he also described as normal for the airstrip), and then the right wing lifted to what felt like about 2 feet. The pilot applied aileron and rudder corrections and applied the brakes during the landing roll, but the airplane moved the left of the airstrip centerline and collided with two parked airplanes. The pilot noted that he has flown into the airstrip for 21 years in all conditions and did not feel uncomfortable with the landing conditions. The pilot reported no mechanical malfunction of the airplane. He said that he had recent experience in the airplane but noted that it may differ some from his own airplane in how it reacts to flight control inputs.

Aircraft

Registration
N234T
Reported as
Piper PA 18-105 Special
Category
Airplane
Serial number
18-2348
Built
1953
Airframe hours
6,799
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 13, 2013 · 2 hours before
Departed
MRI · Anchorage, AK
Destination
AK12 · Anchorage, AK
Airport
AK12 · Flying Crown, runway 13, 1,078 × 50 ft, grass/turf

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
56
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
September 29, 2013
Seat
Front
Flight hours
2,300 total · 1,000 in this make and model · 2,300 as pilot in command · 22 in the last 90 days · 10 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 15 knots, gusting 20
Visibility
10 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 43 °F
Altimeter
30.04 inHg
Turbulence
Unknown

Docket · 1

The files NTSB released with the investigation on October 6, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 222 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.

Other investigations on N234T · 2

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