GAA17CA106

NTSB accident investigation · Maule M7 · Palouse, WA · December 31, 2016

Accident · Minor injuriesData collectionFinal report
Date
December 31, 2016, 11:00 local (19:00 UTC)
Place
Palouse, WA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N260BDMaule M7
Defining event
Taxi: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report March 13, 2017
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20161231023649A
Case key
94559

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 failure to maintain directional control on an ice- and snow-covered runway during taxi with a crosswind, which resulted in a runway excursion.

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: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedMaule M-7-260: 3 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotMaule M-7-260: 3 casesAll aircraft: 9,295 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Effect on operationMaule M-7-260: 3 casesAll aircraft: 1,008 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 of the tailwheel-equipped airplane reported that, during a "medium speed taxi" on a runway in crosswind conditions, the airplane taxied over ice and drifted to the right. The pilot further reported that he corrected to the left, reduced throttle power, and the airplane taxied onto packed snow, "regaining lateral traction." The pilot attempted to correct with right rudder, but the airplane continued to veer to the left, exited the runway, and came to rest inverted. The airplane sustained substantial damage to the left wing and left wing lift struts. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

Factual narrative

The pilot of the tailwheel-equipped airplane reported that during a "medium speed taxi" on a runway in crosswind conditions the airplane taxied over ice and drifted to the right. The pilot further reported that he corrected to the left, reduced throttle power, and the airplane taxied onto packed snow, "regaining lateral traction". The pilot attempted to correct with right rudder, but the airplane continued to veer to the left, exited the runway, and came to rest inverted. The airplane sustained substantial damage to the left wing and left wing lift struts. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

Aircraft

Registration
N260BD
Reported as
Maule M7 (260)
Category
Airplane
Serial number
26016C
Built
2005
Airframe hours
828.9
Engine
Lycoming IO-540-V4A5, 260 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 19, 2016
Departed
WN26 · Palouse, WA
Destination
PUW · Pullman/Moscow, WA
Airport
WN26 · Schoepflin, runway 22, 2,200 × 40 ft, asphalt
Equipment
Handheld GPS

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
45
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Waiver time limited special
Last flight review
July 8, 2016
Seat
Left
Restraint
3-point
Flight hours
317 total · 74 in this make and model · 244 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
23 °F, dew point 19 °F
Altimeter
29.96 inHg
Observed at
KPUW, 9 nm away

Docket · 2

The files NTSB released with the investigation on February 1, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 877 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.