Boeing’s worker instructions criticized for complexity and confusion.

Boeing Co.’s quality management system came under intense scrutiny during a hearing investigating a January 5 incident involving a 737 Max 9 aircraft. A representative for Boeing workers criticized the company's processes as overly complex and difficult to follow.

Lloyd Catlin, a business representative for the International Association of Machinists and Aerospace Workers, which represents thousands of Boeing employees, stated, "The company’s system is very complicated. The procedures and instructions have undergone numerous changes, especially over the last decade, making them ambiguous and open to misinterpretation."

These concerns were highlighted during the second day of an extensive hearing held by the U.S. National Transportation Safety Board (NTSB). The hearing aimed to investigate why a panel, known as a door plug, detached from a nearly-new Boeing 737 Max 9 aircraft in January. Since the incident, Boeing has reportedly made efforts to address quality issues at its factories, including simplifying instructions for workers.

The hearing addressed various topics, including the manufacturing of the 737 Max, the events leading to the door plug falling off mid-flight, Boeing’s safety and quality management systems, and the Federal Aviation Administration’s (FAA) oversight of the planemaker.

Boeing’s factory processes have faced intense scrutiny from regulators and safety inspectors since the accident. Earlier this year, the FAA released a critical report faulting Boeing for unclear processes, noting that workers are not always aware of senior management's demands.

Catlin pointed out that changes in procedural terms have caused confusion. For instance, inspections were renamed verifications and later conformance decisions. These changes, though seemingly minor, significantly impact who performs the work.

"They appear to be slight changes, but they are dramatic changes," Catlin said during the hearing.

Hector Silva, vice president of regulatory compliance and core quality for Boeing’s commercial airplane division, acknowledged Catlin’s concerns. Silva stated that Boeing is working to improve communication about the reasons behind certain changes and is seeking more feedback from shop floor workers who interact with these processes daily.