Primary finding
Probable cause
Main landing gear collapse as a result of the failure of a landing gear hydraulic pump seal.
Investigator assessment
Analysis narrative
The pilot was making pattern approach for landing. He stated that he visually confirmed the landing gear was down. During landing rollout both main landing gear collapsed. The investigation revealed that a seal on the landing gear hydraulic pump had ruptured resulting in loss of system fluid.
Source record
Factual narrative
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