WPR21LA361

NTSB accident investigation · Maule MX-7-180A · Elk River, ID · September 25, 2021

Accident · No injuriesClass 4 · LimitedFinal report
Date
September 25, 2021, 14:09 local (21:09 UTC)
Place
Elk River, ID
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N31876Maule MX-7-180A
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Western Pacific Region
Parties
FSDO
FAA report
20210925017369A
Case key
104074

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 during takeoff, which resulted in a runway excursion and impact with a fence.

Findings · 2

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotMaule MX-7-180A: 11 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedMaule MX-7-180A: 7 casesAll aircraft: 3,958 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 of the tailwheel equipped airplane reported that, during takeoff from a rough gravel airstrip, the airplane veered left and exited the runway surface despite his control inputs. Subsequently, the airplane veered right, and traveled down sloping terrain and impacted a fence, which resulted in substantial damage to the left wing and left elevator. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N31876
Reported as
Maule MX-7-180A
Category
Airplane
Serial number
20045C
Built
1995
Airframe hours
641
Engine
Textron Lycoming O360-C4F, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 3, 2020
Departed
HRI · Hermiston, OR
Destination
ID85 · Elk River, ID
Airport
ID85 · Elk River, runway 17/35, 3,000 × 150 ft, gravel
Equipment
Stall warning system, Electronic flight bag or handheld device

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
76
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Last flight review
July 22, 2009
Seat
Left
Restraint
3-point
Flight hours
649 total · 270 in this make and model · 532 as pilot in command · 2 in the last 90 days · 2 in the last 30 days
Role
Co-pilot
Age
62
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
April 11, 2021
Seat
Rear
Restraint
3-point
Flight hours
0 total · 0 in this make and model

Weather

Conditions
Visual (VMC) · Day
Visibility
9 statute miles
Lowest ceiling
None
Temperature
77 °F, dew point 39 °F
Altimeter
29.93 inHg
Observed at
KPUW, 39 nm away
METAR
KPUW 252053Z AUTO VRB03KT 9SM CLR 25/04 A2993 RMK AO2 SLP120 T02500039 58010

Docket · 3

The files NTSB released with the investigation on June 1, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.7 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.