N686JM Michael Moneyhan Magnum accident

NTSB SEA06CA010 · 2005-10-22 · Cougar, WA

Docket — crew, injuries and powerplant

Summary

The pilot made two passes over the sand bar looking for a good place to land. Observing an area with ATV tracks, which didn't appear to be too deep, the pilot made his approach and touched down. While rolling out the pilot observed deep swales in front of him, which he failed to see from the air due to the sunglare. After applying full power in an attempt to go around the airplane impacted three swales, resulting in the main landing gear separating and the airplane nosing over before coming to rest inverted.

Full narrative

On October 22, 2005, approximately 1300 Pacific daylight time, a Michael Moneyhan Magnum, single-engine airplane, N686JM, sustained substantial damage after impacting terrain and nosing over near Cougar, Washington. The airplane was registered to and operated by a private individual. The certificated private pilot and his sole passenger sustained minor injuries. Visual meteorological conditions prevailed at the time of the accident, which was operated in accordance with 14 CFR Part 91, and a flight plan was not filed. At 1200 the local flight departed the Walter Sutton Private Airstrip (WA79), Amboy, Washington.

In a written statement the pilot reported that after making two low approaches over the sand bar looking for a good place to land, "...I thought I had picked out a nice flat and hard place; there were All Terrain Vehicle (ATV) tracks on it and they appeared not to be very deep and the area looked flat." The pilot further reported that after he had touched down and was rolling out, "...deep swales appeared in front of me that could not be seen from the air. I applied full power to go around, but was unable to get flying speed before I could avoid hitting the first one." The pilot stated that the airplane bounced and hit terrain with its right wing tip and flaperon, before closing the throttle. The pilot reported that as he was pulling the mixture to full lean the airplane hit a third swale, resulting in both main landing gear separating from the airplane before nosing over and coming to rest in an inverted position. The pilot stated that the swales were not visible to him due to the "bright, sunny day." The pilot reported that damage to the airplane included the left wing and both wing struts being bent, the propeller and propeller spinner destroyed, the rudder bent, and the right wing damaged.

Probable cause

The pilot's inadequate in-flight decision to land on the uneven terrain, which resulted in the airplane nosing over. Factors contributing to the accident included the uneven terrain and the sunglare condition. The National Transportation Safety Board determined the probable cause of this accident.

Circumstances

Event type
Accident
Highest injury
Minor
Weather conditions
Visual Meteorological Cond
Light condition
Day
Ceiling (ft)
0
Wind direction
0
Distance from field
0.0

Aircraft

RegistrationMakeModelDamageFAR part
N686JM Michael Moneyhan Magnum SUBS 091

Sequence of events

#OccurrencePhase
1 230 Cruise
2 300 Cruise

Findings

Finding
19200
19200 factor
20100 factor
24010 cause