IHI Corp. said Friday it will boost steps to ensure product safety after an inspection scandal revealed that jet engines and parts it made had been given improper inspections for a decade.

The supplier to aviation giants Boeing Co. and Airbus S.A.S said one of the causes of the improper inspections had been traced to its priority of meeting delivery deadlines at a time when its jet engine business was expanding, a decision that led to a lack of safety awareness.

IHI submitted the preventive measures to the transport ministry, which issued a business improvement order to it in April.