ASN Wikibase Occurrence # 294414
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| Date: | Thursday 7 October 2004 |
| Time: | 17:30 LT |
| Type: |  Piper PA-18-150 |
| Owner/operator: | Private |
| Registration: | N5760D |
| MSN: | 18-5262 |
| Year of manufacture: | 1956 |
| Total airframe hrs: | 2735 hours |
| Engine model: | Lycoming O-320 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Anchorage, Alaska -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Kenai Airport, AK (ENA/PAEN) |
| Anchorage-Merrill Field, AK (MRI/PAMR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The private pilot reported he made a hard landing on a paved runway in his tail wheel and tundra tire equipped airplane, and that the left main landing gear assembly subsequently collapsed. The airplane sustained structural damage to the left wing when it struck the runway. An inspection of the main landing gear (MLG) assembly by the NTSB investigator-in-charge and FAA certification engineers, disclosed that the MLG was not an approved component, although it had been stamped "PMA" for Primary Manufacturing Authority, indicating it was an approved part. Further research and analysis of the gear assembly revealed that it had fractured at the shock strut attachment lugs, and that the lugs were approximately one-half strength of the original factory equipment. The MLG assembly has been available for several years, and may be retro-fitted to the entire Piper Cub series airplanes. The FAA aircraft certification branch and the manufacturer are presently conducting a review of the design and have indicated that a manufacturer's Service Bulletin will be published offering a strengthened version of the MLG, and that the FAA will issue either a Special Airworthiness Information Bulletin, or an Airworthiness Directive.
Probable Cause: The inadequate and unapproved design of the main landing gear assembly by the manufacturer, which resulted in a failure of the main landing gear during landing, and structural damage to the airplane. A factor in the accident was the pilot's misjudged flare.
Accident investigation:
 |
|
Sources:
NTSB ANC05LA001
History of this aircraft
Other occurrences involving this aircraft
| 14 May 1996 | N5760D | Private | 0 | Big Lake, AK | |
sub |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Oct-2022 17:54 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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