Performance testing of aerial devices should be performed at least how often?

• A. At least annually or after major repair or overhaul
• B. Every 5 years
• C. Only during manufacture
• D. Only after an accident

Answer: (D)

Performance testing confirms that an aerial device can perform its intended functions safely and within the manufacturer’s specifications under normal operating conditions. The key idea is to verify that all critical capabilities—movement of the boom (extension, elevation, rotation), stabilizers, and control interlocks—still operate correctly and that there are no leaks, abnormal sounds, or excessive wear that could compromise performance. Because equipment ages, accumulates wear, and can be altered by major repairs or component replacements, testing should be done at least once a year and again after any major repair or overhaul to verify that the device still meets required tolerances and safety criteria. Relying solely on after-accident checks can miss gradual wear or subtle changes that develop over time, so regular annual testing plus post-maintenance verification helps ensure reliability and safety in real deployments.