GAA18CA006

NTSB accident investigation · Maule M 7 · Manokatak, AK · October 7, 2017

Accident · No injuriesData collectionFinal report
Date
October 7, 2017, 14:30 local (22:30 UTC)
Place
Manokatak, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N81818Maule M 7
Defining event
Takeoff: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report May 14, 2018
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20171007014389A
Case key
96163

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 maintain directional control during takeoff in gusting wind conditions.

Findings · 3

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 M-7-235: 3 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedMaule M-7-235: 3 casesAll aircraft: 3,958 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationMaule M-7-235: 1 caseAll aircraft: 1,199 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, during takeoff from a beach, a wind gust pushed the airplane down, and he was unable to arrest the descent. Subsequently, the right wing impacted the beach first, then the left wing, the left landing gear collapsed, and the airplane came to a stop. The airplane sustained substantial damage to both wings. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. According to the pilot, about the time of the accident, the wind was from 40° at 10 knots, gusting to 18 knots, and visibility was 10 miles. It is unknown from which direction the airplane was departing.

Factual narrative

The pilot reported that during takeoff from a beach, a gust of wind pushed the airplane down, and he was unable to arrest the decent. Subsequently the right wing impacted the beach first, then the left wing, the left landing gear collapsed, and the airplane came to a stop. The airplane sustained substantial damage to both wings. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. According to the pilot the weather about the time of the accident was wind from 40° at 10 knots, wind gusts at 18 knots, and visibility of 10 miles. Its unknown which direction the airplane was departing.

Aircraft

Registration
N81818
Reported as
Maule M 7 (235)
Category
Airplane
Serial number
4047C
Built
1987
Airframe hours
3,434
Engine
Lycoming O-540-33A5, 235 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · September 4, 2017
Departed
DLG · Dillingham, AK
Destination
Manokatak, AK
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
36
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
September 5, 2017
Seat
Left
Flight hours
8,450 as pilot in command · 125 in the last 90 days · 75 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
40° at 11 knots, gusting 18
Visibility
8 statute miles
Lowest ceiling
1,700 ft broken
Temperature
37 °F, dew point 37 °F
Altimeter
29.70 inHg
Observed at
PAMB, 18 nm away

Docket · 2

The files NTSB released with the investigation on March 28, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.1 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 N81818 · 1

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