ASN Wikibase Occurrence # 285492
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| Date: | Saturday 1 November 2008 |
| Time: | 15:30 LT |
| Type: |  Piper PA-44-180 Seminole |
| Owner/operator: | Flight School Of Gwinnett Inc |
| Registration: | N2214N |
| MSN: | 44-7995226 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 7802 hours |
| Engine model: | Lycoming O-360 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lawrenceville, Georgia -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Lawrenceville-Gwinnett County Briscoe Field, GA (LZU/KLZU) |
| Lawrenceville-Gwinnett County Briscoe Field, GA (LZU/KLZU) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During touchdown following a practice ILS approach, the nose gear collapsed, resulting in structural damage to the airplane. Examination of the nose gear assembly revealed that the nose gear drag link bolt failed. The bolt was installed on the airplane approximately 441 flight hours prior to the accident, and Piper Service Bulletin (SB) 1156 requires operators to replace the bolt at 500-hour intervals due to a history of fatigue failures. Examination of the failed bolt revealed that it met design specifications for hardness, surface roughness, and microstructure. Further examination indicated that the bolt failed from reversed bending fatigue. The failure mode was atypical of the failure mode that prompted issuance of the SB.
Probable Cause: The failure of the nose gear drag link bolt due to reversed bending fatigue.
Sources:
NTSB ERA09LA050
Accident investigation:
 |
|
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Oct-2022 10:28 | ASN Update Bot | Added |
| 17-Nov-2022 19:53 | Ron Averes | Updated [Aircraft type, Narrative] |
Corrections or additions? ... Edit this accident description
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