WPR14CA212

NTSB accident investigation · Piper PA 18A · Arlington, WA · May 18, 2014

Accident · No injuriesData collectionFinal report
Date
May 18, 2014, 16:00 local (23:00 UTC)
Place
Arlington, WA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N7474DPiper PA 18A
Defining event
Taxi-from runway: Nose over/nose down
Weather
Visual (VMC) · Day
Status
Completed · report June 18, 2014
Report
Approved by Office Director
NTSB office
Western Pacific Region
Case key
89287

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 pilot's improper application of brakes during taxi in tailwind conditions, which resulted in a loss of aircraft control and subsequent nose over.

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.

Performance/control parameters: surface speed/brakingAircraft › Aircraft oper/perf/capability · Incorrect use/operationPiper PA-18A: 3 casesAll aircraft: 238 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18A: 6 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-18A: 13 casesAll aircraft: 9,295 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on equipmentPiper PA-18A: 3 casesAll aircraft: 594 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 stated that while taxing the tailwheel equipped airplane, the slight crosswind became a tail wind. Both he and his passenger may have both hit the brakes at the same time, which resulted in the airplane nosing over and substantially damaging the tail. There was no report of a preimpact mechanical malfunction or failure that would have precluded normal operation.

Factual narrative

The pilot stated that while taxing the tailwheel equipped airplane, the slight crosswind became a tail wind. Both he and his passenger may have both hit the brakes at the same time, which resulted in the airplane nosing over and substantially damaging the tail. There was no report of a preimpact mechanical malfunction or failure that would have precluded normal operation.

Aircraft

Registration
N7474D
Reported as
Piper PA 18A (105SPECIAL)
Category
Airplane
Serial number
18-5809
Built
1957
Airframe hours
9,246
Engine
Lycoming O&VO-360 SER, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Evergreen Soaring Inc
Registered owner
Evergreen Soaring Inc
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 24, 2013
Departed
KAWO · Arlington, WA
Destination
KAWO · Arlington, WA
Airport
KAWO · Arlington

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
62
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Seat
Front
Restraint
4-point
Flight hours
882 total · 1 in this make and model · 755 as pilot in command · 4.9 in the last 90 days · 0 in the last 30 days · 0 in the last 24 hours
Role
Co-pilot
Age
69
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Rear
Restraint
Lap only
Flight hours
1,263 total · 250 in this make and model · 1,072 as pilot in command · 23 in the last 90 days · 11 in the last 30 days · 0.2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Observed at
KAWO

Docket · 2

The files NTSB released with the investigation on June 4, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.2 MB in all.

Other investigations on N7474D · 2

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