BLACK SHEEP AVIATION LLC CCX-1865 near Big Creek Ranger Station, ID — 2023-06-28

Probable cause

The pilot’s failure to identify the wet landing surface and his subsequent inability to maintain directional control and stop during landing on the unimproved grass runway, which resulted in a runway excursion and unintentional ground loop.

NTSB narrative

The pilot of the tailwheel-equipped airplane reported that he conducted multiple passes over the landing area to assess the landing conditions and did not see that the grass surface was wet. Upon touchdown, he noticed the airplane did not decelerate as expected due to wet tires, and the brakes had little effect. The airplane veered off its intended path, heading toward steep downhill terrain. To prevent continuing uncontrollably downhill, the pilot attempted an intentional ground loop by applying full right rudder and power. Subsequently, the airplane tipped left and stopped before reaching the steeper terrain, resulting in substantial damage to the left aileron and left elevator. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

NTSB coding

• Loss of control on ground · Landing-landing roll

Evidence available

• Photos
• 2 docket documents

Docket documents2

• PILOT/OPERATOR AIRCRAFT ACCIDENT REPORT, NTSB FORM 6120.1form
• PHOTOSphotos

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