Narrative:

I received a standard preflight briefing by phone from FSS and filed a flight plan. I did a preflight noted that my hydraulic pressure was around 900 psi and fueled my aircraft. I then did a run according to my lake preflight check list noting no abnormalities. The take off and climb was normal. The duration of flight was approximately one hour. Upon reaching my destination I was vectored by ATC for a visual approach. At approximately 2-3 miles out I deployed my landing gear and noted that I had a gear down indication and hydraulic pressure was in the normal range at about 1;000 psi. I verified that all three gear where down by visually looking into my mirrors I have mounted on my plane. I then selected flaps down and verified I had a flaps down indicator light. I rechecked the hydraulic pressure and it was in the normal range. I proceeded on final with a normal approach and touch down at approximately 70 mph. I was on the runway center line for approximately 3 seconds; the airplane was going about 60mph. I then felt the aircraft tilt to the right and felt the airplane thump and heard a scraping noise until the airplane came to a complete stop. Realizing what had occurred I checked my hydraulic pressure and noted it was normal at 1;000 psi. I shut the airplane down and radioed the tower of my condition and requested assistance. Standing outside my aircraft I noticed that the left landing gear was down and locked; the right side landing gear was retracted back half way up and had been dragged down the runway; scraping the sidewall of the tire and back corner of the brake caliper. The right sponson (float) had made contact with the ground but received only minor scrapes on the bottom. The nose gear had also collapsed half way up; it kept the nose of the aircraft from making contact with the runway. The aircraft had moved only about 10 feet off the center line to the right. I estimate the aircraft slid about 400 feet after the right side gear and nose wheel collapsed. The emergency equipment; police; airport operations officer and FBO maintenance was sent to my aid. They assisted in lifting the right wing up. When the wing was lifted up the right landing gear moved itself to the fully extended and locked down position. I then lifted the nose of the plane up at which time the nose gear fully extended itself to the down and locked position. As a precaution the right gear was collared by the mechanic to make sure it would not involuntarily collapse as I taxied the airplane under its own power off the runway and then to the maintenance shop for inspection. The mechanic then put the aircraft up on jack stands and did a visual inspection and cycled the gear up and down three times and lubricated all the pivot points as a precaution as they found no problems. The FAA inspector came out and looked over the plane and made a report. The mechanic made a log book entry and released the plane back to me at which time I flew the plane back to its home base one hour away. The plane made a normal flight and landing. The hydraulic pressure was normal during its flight and post landing. I fueled the airplane and returned it to its hangar. The aircraft is going to be returned to the repair facility where it received its last annual inspection for further investigation and minor repairs.

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Original NASA ASRS Text

Title: The Pilot of a Lake amphibian suffered a collapse of the right main and nose gears upon landing.

Narrative: I received a standard preflight briefing by phone from FSS and filed a flight plan. I did a preflight noted that my hydraulic pressure was around 900 psi and fueled my aircraft. I then did a run according to my Lake preflight check list noting no abnormalities. The take off and climb was normal. The duration of flight was approximately one hour. Upon reaching my destination I was vectored by ATC for a visual approach. At approximately 2-3 miles out I deployed my landing gear and noted that I had a gear down indication and hydraulic pressure was in the normal range at about 1;000 psi. I verified that all three gear where down by visually looking into my mirrors I have mounted on my plane. I then selected flaps down and verified I had a flaps down indicator light. I rechecked the hydraulic pressure and it was in the normal range. I proceeded on final with a normal approach and touch down at approximately 70 mph. I was on the runway center line for approximately 3 seconds; the airplane was going about 60mph. I then felt the aircraft tilt to the right and felt the airplane thump and heard a scraping noise until the airplane came to a complete stop. Realizing what had occurred I checked my hydraulic pressure and noted it was normal at 1;000 psi. I shut the airplane down and radioed the tower of my condition and requested assistance. Standing outside my aircraft I noticed that the left landing gear was down and locked; the right side landing gear was retracted back half way up and had been dragged down the runway; scraping the sidewall of the tire and back corner of the brake caliper. The right sponson (float) had made contact with the ground but received only minor scrapes on the bottom. The nose gear had also collapsed half way up; it kept the nose of the aircraft from making contact with the runway. The aircraft had moved only about 10 feet off the center line to the right. I estimate the aircraft slid about 400 feet after the right side gear and nose wheel collapsed. The emergency equipment; police; airport operations officer and FBO maintenance was sent to my aid. They assisted in lifting the right wing up. When the wing was lifted up the right landing gear moved itself to the fully extended and locked down position. I then lifted the nose of the plane up at which time the nose gear fully extended itself to the down and locked position. As a precaution the right gear was collared by the mechanic to make sure it would not involuntarily collapse as I taxied the airplane under its own power off the runway and then to the maintenance shop for inspection. The mechanic then put the aircraft up on jack stands and did a visual inspection and cycled the gear up and down three times and lubricated all the pivot points as a precaution as they found no problems. The FAA Inspector came out and looked over the plane and made a report. The mechanic made a log book entry and released the plane back to me at which time I flew the plane back to its home base one hour away. The plane made a normal flight and landing. The hydraulic pressure was normal during its flight and post landing. I fueled the airplane and returned it to its hangar. The aircraft is going to be returned to the repair facility where it received its last annual inspection for further investigation and minor repairs.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.