NTSB Identification: SEA05LA141.
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Nonscheduled 14 CFR
Accident occurred Friday, July 08, 2005 in Stuart Island, WA
Probable Cause Approval Date: 10/27/2005
Aircraft: Cessna 206E, registration: N9428G
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
Due to the restrictions created by marginal VFR conditions, the pilot entered the pattern on a close-in dogleg to final for a landing to the west. Just as he was starting to turn final, he heard another pilot broadcast that he was departing Stuart Island to the east. The pilot then transmitted, "Aircraft close in, landing to the west, Stuart". He then prepared to execute a go-around. But, as he rounded the corner of the island and rolled out on final, the pilot saw an aircraft pull off of the runway to the grassy area to its south. He therefore decided to continue his approach to a full-stop landing. Upon touchdown on the 2,000 foot runway, the aircraft encountered a significant amount of standing water, and the pilot immediately retracted the flaps in order to get more weight on the wheels for braking. Because of the amount of standing water, the aircraft began to hydroplane, and as it neared the end of the runway, it still had not come to a stop. In an attempt to keep the aircraft from going off the far end of the runway, the pilot intentionally executed a sharp turn to the right. Just after the turn was initiated, the left main gear and the nose gear dug into the soft muddy surface, resulting in the aircraft tipping up on its left side and the left wing contacting the runway surface. During the investigation it was determined that a heavy rain shower had passed through the area about 15 minutes prior to the landing, and that there was still a significant portion of the runway surface that had standing water on it. During a post-accident interview, the pilot started that he did not realize that there was so much standing water on the runway until after he touched down and it started spraying up on the bottom of the wing and onto the windshield. He further stated that if he had realized that the potential for hydroplaning was so great, he would have slowed his approach speed to compensate for the overly-wet conditions.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot's excessive airspeed on final for the current runway surface conditions, and the intentional obstruction avoidance maneuver he executed when it became clear the aircraft was about to go off the end of the runway. Factors include the pilot's improper decision to land on a surface that he had not first inspected from the air, clouds and rain in the area, and a wet, muddy landing surface. Full narrative available
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