Tuesday, September 27, 2016

Helio H-250 Courier, N6324V: Accident occurred September 26, 2016 in Anchorage, Alaska


FAA Flight Standards District Office: FAA Anchorage FSDO-03

NTSB Identification: ANC16LA072
14 CFR Part 91: General Aviation
Accident occurred Monday, September 26, 2016 in Anchorage, AK
Aircraft: HELIO H-250, registration: N6324V
Injuries: 1 Uninjured.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

On September 26, 2016, about 1420 Alaska daylight time, a tailwheel-equipped Helio Courier H-250 airplane, N6324V, sustained substantial damage during the landing roll at the Lake Hood Seaplane Base, Anchorage, Alaska. The certificated commercial pilot sustained no injury. The airplane was registered to, and operated by, a private individual as a visual flight rules (VFR) flight under the provisions of 14 Code of Federal Regulations (CFR) Part 91. Visual meteorological conditions prevailed at the time of the accident, and a VFR flight plan had been filed. The flight originated from a private airstrip near Igiugig, Alaska, about 1200. 

During a telephone interview with the National Transportation Safety Board (NTSB) investigator-in-charge on September 26, the pilot stated that after an uneventful touchdown on the dry and gravel surface of runway 32, a medium vibration was felt as the pilot applied the brakes. As the airplane continued the landing roll, he released the brakes and both of the main landing gear leg assemblies sheared off. The propeller impacted the runway, and the airplane came to rest on the bottom of the fuselage without further incident. 

The airplane sustained substantial damage to the fuselage. A postaccident inspection revealed that the main landing gear leg assemblies on both sides sheared off below a support bracket located at the intersection of the tubular steel structure of the fuselage attachment points. The main landing gear leg assemblies (left side, part number 250-040-451-50 and right side, part number 250-040-451-1) are constructed of 1/8-inch steel, which is molded and welded to form a 2-inch-square steel tube. The main landing gear legs are covered by a contoured fairing assembly. The two main landing gear leg assemblies were secured and transported to the NTSB Materials Laboratory in Washington, D.C., for further examination. 

The closest weather reporting facility was the Lake Hood Seaplane Base. At 1353, an Aviation Routine Weather Report (METAR) was reporting in part: wind from 310 degrees at 5 knots; visibility 10 statute miles; sky condition, overcast 5,500 feet; temperature 46 degrees F; dew point 36 degrees F; altimeter 29.89 inHg.

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