ASN Wikibase Occurrence # 314544
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| Date: | Sunday 16 January 2011 |
| Time: | 15:00 LT |
| Type: |  Mitsubishi MU-2B-20 |
| Owner/operator: | |
| Registration: | N52CD |
| MSN: | 174 |
| Year of manufacture: | 1969 |
| Total airframe hrs: | 8125 hours |
| Engine model: | Airesearch TPE331 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Walterboro, South Carolina -
 United States of America
|
| Phase: | Standing |
| Nature: | Private |
| Departure airport: | Edenton Municipal Airport, NC (EDE/KEDE) |
| Walterboro Municipal Airport, SC (RBW/KRBW) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported hearing a 'popâ sound from the nose gear area when the gear was extended for the landing. Toward the end of the landing roll, the nose gear collapsed. A postaccident examination of the nose gear revealed that the bolt that holds the downlock drag brace joint link to the airframe structure had fractured. A metallurgical examination revealed that the bolt failed in reverse bending fatigue, which is associated with the bolt having insufficient clamping pressure (looseness). The airplane's last required inspection was about 70 flight hours and 40 gear cycles before the nose gear collapsing, and the nose gear downlock system rigging should have been inspected at that time.
Probable Cause: The inadequate inspection and rigging of the nose landing gear downlock mechanism by maintenance personnel, which resulted in the failure of a bolt and the subsequent collapse of the nose gear during the landing roll.
Accident investigation:
 |
|
Sources:
NTSB ERA11IA172
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Jun-2023 18:32 | ASN Update Bot | Added |
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