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ASN Wikibase Occurrence # 200588
Last updated: 8 March 2020
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Date:26-SEP-2016
Time:14:20
Type:Silhouette image of generic COUR model; specific model in this crash may look slightly different
Helio H-250 Courier
Owner/operator:Private
Registration: N6324V
C/n / msn: 2538
Fatalities:Fatalities: 0 / Occupants: 1
Aircraft damage: Substantial
Category:Accident
Location:Anchorage, AK -   United States of America
Phase: Unknown
Nature:Private
Departure airport:Igiugig, AK (None)
Destination airport:Anchorage, AK (LHD)
Investigating agency: NTSB
Narrative:
The commercial pilot reported that, after an uneventful touchdown on the dry, gravel-surface runway, he felt a medium vibration as he applied the brakes. As the airplane continued the landing roll, both main landing gear (MLG) legs sheared off. The propeller impacted the runway, and the airplane came to rest on the bottom of the fuselage, which sustained substantial damage.
A postaccident examination of the airplane revealed that both MLG legs failed due to fatigue cracking. The fatigue cracks were extended by intermittent overstress until the legs separated. The overstress extensions likely occurred during the accident landing or immediately before it because there was no corrosion of the crack surfaces.

Probable Cause: The fatigue fracture failure of both main landing gear (MLG) legs during the landing roll, which resulted in the collapse and separation of both MLG legs.
 

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20160928X65756&key=1


Revision history:

Date/timeContributorUpdates
26-Oct-2017 19:50 ASN Update Bot Added

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