Heavy machinery maker IHI Corp. said Friday it has found 211 cases in which airplane engines were improperly inspected over the past two years, including by uncertified workers.

It has also found cases where qualified workers did not follow the prescribed order in conducting maintenance work and where inspectors falsified the inspection dates, according to an interim report released Friday.

The supplier of Boeing Co. and Airbus S.A.S. said a shortage of inspectors and other factors led to misconduct that began in January 2017, at the latest, in a Tokyo factory where IHI provides maintenance for around 100 to 150 engines a year.

IHI first admitted to the misconduct on Tuesday.

There are no problems in the capability and performance of the affected engines, the company said.

IHI is the latest major manufacturer to become embroiled in a scandal over quality control. Subaru Corp. and Nissan Motor Co. revealed some of their vehicles had been inspected by unqualified workers, while Kobe Steel Ltd. and Mitsubishi Materials Corp. admitted to fabricating product data.

Source: ANNnewsCH