What is the first thing required for inspecting an igniter from an APU?

• A. Remove fuel line
• B. Ground the igniter plug after removal
• C. Clean with solvent
• D. Check continuity

Answer: (B)

Ground the igniter plug after removal to discharge any stored energy and prevent shock, arcing, or accidental ignition during handling. Ignition components can hold a charge in capacitors, so establishing a solid ground path ensures a safe, accurate inspection and prepares you for any subsequent electrical tests like continuity checks. Removing a fuel line isn't part of the ignition inspection and can create a fuel leakage risk; cleaning with solvent isn't the first step because it can leave residues or be inappropriate for energized hardware; and checking continuity is done after ensuring the component is de-energized and grounded.