Fault Phenomenon: Sinoboom GTBZ58 telescopic boom aerial work platform an obvious crack is found at the boom root, posing a fracture risk.

Troubleshooting Process:
– Checked weld: weld cracked.
– Checked operation records: history of overload or impact.
– Checked fatigue: long-term high-load fatigue.
– Checked material: material defect.

Root Cause: The boom root developed a fatigue crack due to long-term alternating stress.

Required Parts: Professional welding repair or boom section replacement.