Unscheduled maintenance is located in chapters 3 through 24. The
PMCS and troubleshooting tables often reference you to these procedures. When you perform maintenance,
look over the entire procedure before starting. Make sure you have the necessary tools and materials at
hand. Always follow the WARNINGS and CAUTIONS.
FOLLOW THESE GUIDELINES WHEN USING THIS MANUAL:
Become familiar with the entire maintenance procedure before beginning a maintenance task.
before performing any procedures.