Why OEM-Approved Chemistry Doesn’t Guarantee Audit Success

In the aerospace and manufacturing sectors, using OEM-approved cleaning chemistry is often seen as a golden ticket to passing audits. While these approvals confirm that a cleaning product is compatible with specific materials and processes, they do not ensure consistent operational success. Understanding the nuances behind this reality is key for engineers aiming to maintain compliance and operational efficiency.

The Limits of OEM Approval

OEM approvals, including those from major players like Rolls-Royce, Airbus, and Boeing, validate that a particular chemistry is suitable for use in cleaning aerospace components. However, approvals alone do not guarantee that the cleaning process will yield desired results. Variability in cleaning outcomes can still occur due to several critical factors.

Common Issues Leading to Audit Failures

• Using an OEM cleaning product at incorrect concentrations can lead to residues or ineffective cleaning.
  
  
• Solution: Always follow dilution guidelines closely and conduct tests to confirm effectiveness.

• Inconsistent rinse quality can lead to contamination and increase the likelihood of audit failures.
  
  
• Key Practice: Regularly monitor rinse water quality, focusing on conductivity to ensure thorough removal of cleaning agents.

• Even approved chemistries can become ineffective if cleaning baths are contaminated. Repeated use without proper filtration or management can degrade cleaning performance.
  
  
• Recommendation: Implement a robust management system for cleaning baths, including regular checks for contaminants.

• Without ongoing parameter monitoring, fluctuations in cleaning parameters (such as temperature and time) can compromise compliance.
  
  
• Best Practice: Maintain rigorous parameter tracking and calibration for all cleaning systems to ensure they operate within established limits.

The Auditor's Perspective

NADCAP and AS9100 auditors expect complete transparency and reliability in your cleaning processes. They assess not just the chemistry used but also the control measures in place to ensure consistency. A robust documentation system that captures all cleaning actions will support audit readiness.

Key Elements Auditors Focus On:

• Documentation Integrity: Accurate records of cleaning procedures, including dilution ratios and cycle times.
  
  
• Traceability and Control Measures: Can the cleaning process be traced back to specific materials and handled properly?

Confidence in Process Control

While OEM approvals are vital, they should be part of a more comprehensive approach to process control and compliance. Engineers should not rely solely on these certifications; rather, they must maintain robust cleaning protocols and systems that support stability and repeatability.

Final Takeaway

OEM-approved cleaning products are essential, but they are not a standalone solution for audit success. By addressing common issues such as dilution errors, rinse quality, bath contamination, and parameter monitoring, engineers can enhance the reliability of their cleaning processes.

If you're using OEM-approved cleaning chemistry but still facing audit issues, our technical team can help assess your process and improve consistency.

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