1. Purpose

This procedure ensures proper cleanout of the drone spray system to prevent chemicals from gumming up or corroding system components, and to eliminate chemical traces that could carry over to non-target crops.

2. Scope

This procedure applies to all drone models equipped with spray systems. It must be performed daily by the Drone Operator or Field Technician after any spray application.

3. Roles and Responsibilities

4. Safety and Compliance

⚠️ Chemical Hazard: Avoid direct skin contact with tank cleaner solution and other chemicals. Always wear required PPE.

⚠️ Environmental Protection: Do not rinse the drone spray system near water sources such as streams, ponds, or other sensitive water bodies. Dispose of rinse water and chemical waste according to local environmental regulations.

5. Materials and Equipment

• Tank cleaner solution (for spray system flush)
• Drone cleaner (for atomizer nozzles)
• Electrical contact cleaner (for battery terminals)
• Gloves (required PPE)
• Goggles (required PPE)
• Soft bristle brush
• Cleanout log (for recording completion)

6. Procedure

All steps in this procedure are performed by the Drone Operator or Field Technician.

1. Fill the drone tank completely with water.

2. Run water through the spray system using the drone’s clean hose process.

3. Fill the tank again with water and tank cleaner solution.

4. Run the water and tank cleaner solution through the spray system.

5. Fill the tank a third time with clean water only and rinse the spray system completely.

6. Remove the tank strainer and inspect for caked-on residue.

   • If residue is present: Clean the strainer with a soft bristle brush until clean.
   • If no residue is present: Reinstall the strainer.

7. Inspect the atomizer nozzles.

   • If nozzles show debris or blockage: Clean with drone cleaner and a soft bristled brush.
   • If nozzles are clear: Proceed to step 8.

8. Inspect battery terminals for corrosion.

   • If corrosion is present: Clean battery terminals with electrical contact cleaner.
   • If no corrosion is present: Proceed to step 9.

9. Perform a complete visual inspection of the drone.

   • Check for any broken parts, cracked hoses, or broken wires.
   • If damage is found: Document the damage and remove the drone from service until repairs are completed.
   • If no damage is found: Proceed to step 10.

10. Log the completed cleanout in the cleanout log with the date, time, and operator name.

7. Revision History