Specific Service Bulletins (e.g., SB 73-0122) define approved CIS fuels and additives, often requiring specialized inspection if not using standard fuel. 3. Operational Improvements (7B Series)
Enhancements to sensor systems to prevent engine stalls, specifically addressing T12 sensing circuits. CFM56-73.rar
Enhancements implemented for increased efficiency and reliability. Specific Service Bulletins (e
Working Together Team (WTT) meetings in 2017 focused on fan blade repairs, HPT blade inspections, and addressing fuel leaks. 4. Maintenance Planning & Support Specific Service Bulletins (e.g.
Service bulletins under chapter 73 typically cover Engine Fuel and Control.