Incident: Faulty Parts on Boeing 737 Planes: Inspection and Replacement Required

Published Date: 2019-06-03

Postmortem Analysis
Timeline 1. The software failure incident involving faulty parts on Boeing 737 planes, including 737 Max aircraft, happened in June 2019 as reported in Article 85690.
System 1. Slat track assemblies on Boeing 737 Max and NG aircraft [85690]
Responsible Organization 1. Boeing [85690]
Impacted Organization 1. Airlines operating Boeing 737 planes [85690]
Software Causes unknown
Non-software Causes 1. Faulty parts on the wings of the Boeing 737 planes, including the 737 Max aircraft, specifically related to the slat track assemblies [85690].
Impacts 1. The faulty parts on the wings of Boeing 737 planes, including the 737 Max aircraft, could fail prematurely or crack, potentially leading to damage to the aircraft while in flight [85690]. 2. The discovery of the faulty parts led to Boeing advising airlines to inspect and repair the slat track assemblies within a specified timeframe, impacting the operational schedules of the affected planes [85690]. 3. The grounding of the 737 Max aircraft worldwide following the fatal crashes in Ethiopia and Indonesia was a significant impact of the software failure incident, affecting Boeing's reputation and financial performance [85690].
Preventions 1. Implementing stricter quality control measures during the manufacturing process to ensure all parts, including the slat track assemblies, meet the required standards [85690]. 2. Conducting more thorough inspections and testing of the parts before installation on the aircraft to catch any potential defects or issues early on [85690]. 3. Enhancing communication and collaboration between Boeing and its parts suppliers to ensure all components meet safety and quality standards before being integrated into the aircraft [85690].
Fixes 1. Inspecting and repairing the faulty slat track assemblies on the 737 planes, as advised by Boeing and the FAA [85690].
References 1. Boeing 2. Federal Aviation Administration (FAA) 3. Parts supplier 4. Kevin McAllister, CEO of Boeing Commercial Airplanes 5. CNN's Aaron Cooper, Curt Devine, and Drew Griffin [85690]

Software Taxonomy of Faults

Category Option Rationale
Recurring one_organization (a) The software failure incident related to faulty parts on Boeing 737 planes, including the 737 Max aircraft, is an issue that has happened again within the same organization. This incident adds to the series of problems Boeing has faced with its 737 Max planes, including the grounding of the aircraft worldwide after fatal crashes in Ethiopia and Indonesia. The newly discovered issue with the faulty slat track assemblies is another setback for Boeing as it works to address safety concerns and get the 737 Max back in the air [85690].
Phase (Design/Operation) unknown The provided article does not mention any software failure incident related to the development phases of design or operation. Therefore, the information about the software failure incident related to these specific development phases is unknown.
Boundary (Internal/External) within_system (a) within_system: The software failure incident related to the faulty parts on Boeing 737 planes, specifically the slat track assemblies, originated from within the system. Boeing discovered the problem during a meeting with the parts supplier when employees noticed that some parts were not heat treated, indicating a potential safety issue [85690]. This indicates an internal manufacturing or quality control issue within Boeing's processes that led to the identification of the faulty parts.
Nature (Human/Non-human) non-human_actions (a) The software failure incident in this case is not related to non-human actions but rather to faulty parts on the wings of Boeing 737 planes. The issue was discovered during a meeting with the parts supplier when Boeing employees noticed that some parts were not heat treated, indicating a potential safety issue [85690]. This indicates that the failure was due to a manufacturing defect rather than non-human actions. (b) The software failure incident in this case is not related to human actions but rather to a manufacturing issue with the slat track assemblies on Boeing 737 planes. Boeing and the FAA advised airlines to inspect and repair the faulty parts, indicating that the failure was due to a manufacturing defect rather than human actions [85690].
Dimension (Hardware/Software) hardware (a) The software failure incident in this case is related to hardware. Boeing identified faulty parts on the wings of some of its 737 planes, including the 737 Max aircraft, specifically the slat track assemblies. The issue was discovered during a meeting with the parts supplier when Boeing employees noticed that some parts were not heat treated, indicating a potential safety issue [85690].
Objective (Malicious/Non-malicious) non-malicious The software failure incident reported in the article does not involve a malicious software failure. The issue with faulty parts on the wings of Boeing 737 planes, specifically the slat track assemblies, was due to a manufacturing defect where some of the parts were not heat treated, leading to potential safety concerns. This falls under the category of a non-malicious failure as it was not caused by intentional harm but rather by a mistake in the manufacturing process [85690].
Intent (Poor/Accidental Decisions) unknown The software failure incident reported in the article does not relate to poor or accidental decisions. Instead, it is related to faulty parts on the wings of Boeing 737 planes, specifically the slat track assemblies, which were found to not meet manufacturing standards and may need to be replaced to prevent potential failures or cracks [85690].
Capability (Incompetence/Accidental) accidental (a) The software failure incident related to development incompetence is not mentioned in the provided article [85690]. (b) The software failure incident related to an accidental factor is mentioned in the article [85690]. Boeing discovered the problem with faulty parts during a meeting with the parts supplier when employees noticed that some parts were not heat treated, leading them to believe there might be a safety issue. This indicates that the issue was accidental and not intentional [85690].
Duration unknown The software failure incident reported in the article does not directly relate to a permanent or temporary software failure. The issue mentioned in the article pertains to faulty parts on Boeing 737 planes, specifically the slat track assemblies, which are physical components of the aircraft's wings. This incident does not involve software failure but rather a manufacturing defect in the physical parts of the aircraft. Therefore, the concept of permanent or temporary software failure does not apply in this context.
Behaviour omission, other (a) crash: The article does not mention any software crash as the cause of the failure incident. [85690] (b) omission: The faulty parts on the wings of the Boeing 737 planes were identified as not meeting manufacturing standards, which could lead to premature failure or cracking. This omission in meeting the standards could result in the system omitting to perform its intended functions of maintaining the structural integrity of the aircraft wings. [85690] (c) timing: The issue with the faulty parts on the wings of the Boeing 737 planes does not seem to be related to timing issues where the system performs its intended functions but at incorrect times. [85690] (d) value: The software failure incident is not directly related to the system performing its intended functions incorrectly. The issue lies more in the manufacturing defect of the parts rather than the software itself. [85690] (e) byzantine: The article does not mention any byzantine behavior of the software system in this failure incident. [85690] (f) other: The other behavior in this case could be categorized as a failure due to a manufacturing defect in the parts used in the aircraft, specifically the slat track assemblies on the wings. This manufacturing flaw could lead to potential safety issues with the aircraft, highlighting the importance of quality control in the production process. [85690]

IoT System Layer

Layer Option Rationale
Perception None None
Communication None None
Application None None

Other Details

Category Option Rationale
Consequence theoretical_consequence (a) death: The software failure incident related to the faulty parts on Boeing 737 planes did not directly result in any deaths. The grounding of the 737 Max aircraft was due to other fatal crashes that were potentially linked to different issues with the aircraft, not specifically related to the faulty parts mentioned in this incident [85690].
Domain transportation, manufacturing The software failure incident reported in the article [85690] is related to the manufacturing industry. Specifically, the issue pertains to Boeing's 737 planes, including the 737 Max aircraft, which were found to have faulty parts on their wings. Boeing, a major player in the aerospace manufacturing industry, faced challenges with the slat track assemblies on these aircraft, leading to safety concerns and the need for inspections and potential replacements of defective parts.

Sources

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