The verification of airworthiness compliance for aero-engines ingesting birds is a comprehensive test of engine performance and safety. Due to inexperience, issues with automatic engine shutdown arose during these tests. To address this, cause analysis and improvement measures were implemented. By examining key test parameters, changes before and after bird ingestion, test recordings, engine inspections, and simulation analyses, the cause of the shutdown is identified. It is found that the high-pressure compressor surge caused by the first bird ingestion led to abnormal casing deformation near the booster stator, resulting in axial locking and excessive rotor friction. This friction caused the rotor to gradually slow down and eventually stop. Improvements include extending the casing’s positioning surface by 4 mm in the turbocharging stage to prevent abnormal rubbing. Additionally, the bird-ingestion requirement from the 1988 CCAR 33.77 clause is deemed the applicable standard for this engine type.