ASN Wikibase Occurrence # 315006
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| Date: | Thursday 1 June 2023 |
| Time: | 13:30 LT |
| Type: |  Piper PA-28-181 Archer II |
| Owner/operator: | |
| Registration: | N4376H |
| MSN: | 28-8490110 |
| Year of manufacture: | 1984 |
| Total airframe hrs: | 4452 hours |
| Engine model: | Lycoming O-360-A4M |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Pellston Regional/Emmet County Airport (PLN/KPLN), Pellston, MI -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Harbor Springs Airport, MI (KMGN) |
| Pellston, MI | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor and student pilot had completed two touch and go landings. On takeoff after the second landing, they heard an unusual thumping sound or a bang. Due to the unusual noise, the flight instructor elected to perform a precautionary landing. During the approach for a precautionary landing, the airport manager observed that the left main landing gear wheel assembly was hanging from the landing gear strut by the brake line and advised the flight instructor via radio not to land. The flight instructor then diverted to another airport due to the availability of increased airport fire and rescue services. The airplane landed on the runway centerline with the partially separated left main landing gear assembly and sustained substantial damage to the left wing.
Postaccident examination revealed the landing gear strut housing and clevises were fractured at the upper torque link connection. Metallurgical examination revealed the strut and clevises fractured from fatigue cracks that had initiated along the radius of the clevis arms within the inner machined surface. These cracks initiated at multiple casting solidification voids and silicon-rich phases. The cracks propagated through the clevis cross-sections until the remaining cross-sections fractured from overstress.
Probable Cause: The failure of the left main landing gear strut and clevises due to fatigue cracks that initiated at multiple casting solidification voids.
Accident investigation:
 |
|
Sources:
NTSB CEN23LA217
https://flightaware.com/live/flight/N4376H
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Jun-2023 20:29 | Captain Adam | Added |
| 09-Jun-2023 01:35 | RobertMB | Updated |
| 09-Jun-2023 11:12 | Captain Adam | Updated |
| 28-Apr-2024 09:40 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Destination airport, Source, Narrative] |
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