If the side of the aerial is short jacked, you should

• A. Never operate
• B. Operate the aerial
• C. Check fluid levels
• D. Lock the controls

Answer: (A)

Stability and proper leveling are essential before using an aerial device. If a side jack is short, the base isn’t fully supported and the machine won’t be level. Raising the boom in that condition changes the center of gravity and can cause tipping or sudden movement, especially under load or wind.

The safest action is to never operate until the jacks are correctly extended and the machine sits solidly on a firm, level surface. Lower the boom if raised, reposition on stable ground, and have the jack issue inspected or repaired before use. Checking fluid levels doesn’t address the stabilization problem, and locking the controls wouldn’t fix the unstable setup.