ASN Wikibase Occurrence # 145681
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| Date: | Friday 27 April 2012 |
| Time: | 16:20 |
| Type: |  Piper PA-18-150 Super Cub |
| Owner/operator: | State Of Alaska Department Of Public Safety |
| Registration: | N7059 |
| MSN: | 18-8043 |
| Year of manufacture: | 1963 |
| Total airframe hrs: | 11575 hours |
| Engine model: | Lycoming O-320 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Frozen snow covered lake about 28 miles west of Paxon, AK -
 United States of America
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | Anchorage, AK (LHD) |
| Paxon, AK | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot said he was landing a ski-equipped airplane on a remote, frozen and snow-covered lake. He said that as the skis contacted the flat and smooth snow-covered ice, the airplane pitched forward violently, then to the right, and then back to the left. A postaccident examination revealed that the right main landing gear had collapsed and subsequently folded under the airplane. An examination of the right main landing gear revealed a fractured suspension strut that had fractured laterally across a bored and threaded area of the suspension tube. The fractured tube was examined under magnification and there was no evidence of external corrosion. The tube had a long radius bend adjacent to the internal threads. The fracture had a clean, evenly colored fracture surface, and no evidence of repeated fracturing (beach marking). The fracture appearance is consistent with an overstress fracture. The pilot noted that, other than the fractured main landing suspension strut, there were no preaccident mechanical anomalies with the airplane.
Probable Cause: A separation of the right main landing gear suspension strut assembly due to overstress, which resulted in the collapse of the main landing gear while landing.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: https://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20120430X35846&key=1
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=7059&x=27&y=9
http://jetphotos.net/viewphoto.php?id=5780072&nseq=36
History of this aircraft
Other occurrences involving this aircraft
| 22 June 2000 | N7059 | State Of Alaska-public Safety | 0 | QUINHAGAK, Alaska | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-May-2012 19:29 | Geno | Added |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 20:37 | ASN Update Bot | Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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