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Accidents · NTSB GAA18CA569 · Final report

Maule M7 accident near Grass Valley, Oregon, September 16, 2018

On September 16, 2018 at about 1:00 am local time, a 2012 Maule M7, registered N760AC, was substantially damaged in an accident during landing near Grass Valley, Oregon. It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).

The NTSB's probable cause their words, unchanged

The pilot’s failure to maintain directional control during the landing roll.

Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
September 16, 2018 · about 1:00 am local time
Place
Grass Valley, Oregon · map
Type
Accident
Injuries
No one was hurt; 1 person was on board or involved.
Weather
visual conditions (good weather)
Aircraft
Maule M7 260C, built 2012 · all M7s on the register
Registration
N760AC · no longer on the register · serial 30052C
Damage
Substantial damage
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

The pilot of the tailwheel-equipped airplane reported that, during the second approach to the unimproved canyon airstrip in moderate turbulence, he felt that the groundspeed was faster than normal and that he there was a tailwind, but he reduced power to idle and landed the airplane. About 300 ft into the ground roll, at 35 mph, the airplane veered left. He applied right rudder and moderate braking, but the airplane exited the airstrip to the left, and its left main landing gear struck a pile of rocks that were painted white and used to mark the edge of the runway. The left main landing gear separated from the airplane. The airplane sustained substantial damage to the fuselage, left wing, and left aileron. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. An automated weather observation system about 16 nautical miles from the accident site reported that, about the time of the accident, the wind was from 290° at 13 knots, gusting to 16 knots. The pilot was landing to the south.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.

The factual record from the NTSB's investigation tables, in plain English

What happened, in order

  1. Other weather encounter during landing
  2. Loss of control on ground during landing defining event
  3. Attempted remediation/recovery during landing
  4. Runway excursion during landing
  5. Collision with terrain or object (not controlled flight into terrain) during landing
  6. Part(s) separation from AC during landing

The NTSB's findings

  • cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Directional control › Not attained/maintained
  • cause Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
  • Environmental issues › Conditions/weather/phenomena › Wind › Tailwind › Effect on operation
  • Environmental issues › Conditions/weather/phenomena › Wind › Gusts › Effect on operation

Pilot

  • Certificate: private
  • Ratings: single-engine land
  • Flight time: 1,315 hours in all; 1,120 in this make and model; 59 in the last 90 days; 12 in the last 30 days; 1,315 as pilot in command
  • Last flight review: October 10, 2016
  • Medical certificate: Class 3 (without waivers/limitations)
  • Seat: left
  • Injury: no injuries

The aircraft

  • Airframe total time: 969 hours
  • Last inspection: annual inspection, August 27, 2018
  • Maximum gross weight: 2,500 lb
  • Seats: 4
  • Landing gear: fixed
  • Engine: Lycoming IO-540 (piston); 969 hours total

The flight

  • Departed from: 4S2 Hood River OR
  • Destination: Grass Valley OR
  • Flight plan: none

Weather at the time

  • Light: daylight
  • Wind: from 290° at 13 knots, gusting 16
  • Visibility: 10 statute miles
  • Sky: clear
  • Temperature: 66°F (19°C), dew point 43°F (6°C)
  • Altimeter: 29.81 inHg

Injuries

FatalSeriousMinorNone
Flight crew1

Documents from the investigation the NTSB's docket: the evidence folder behind the report

2 documents, released by the NTSB on December 12, 2018. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.

The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.

Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.