When a DROP PANTOGRAPH INSTRUCTION FORM D is in effect, prior to entering the limits specified what must be done?

• A. All Pantographs will be tested; when any Pantograph fails to operate properly, or Drop Pantograph Instruction cannot be complied with, the equipment must be stopped immediately and condition reported to the Train Dispatcher.
• B. Only a subset of pantographs require testing.
• C. All Pantographs will be tested; when any Pantograph fails to operate properly, or Drop Pantograph Instruction cannot be complied with, the equipment must be stopped immediately and condition reported to the Train Dispatcher.
• D. No testing is required.

Answer: (C)

When a Drop Pantograph Instruction Form D is in effect, every pantograph must be checked before you enter the defined limits. The main idea is that you don’t risk moving into restricted airspace with a pantograph that might not function correctly, which could cause loss of power pickup or damage to the overhead system.

So, prior to entering the limits, you test all pantographs. If any pantograph does not operate properly, or if you cannot comply with the Drop Pantograph Instruction, you must stop the equipment immediately and report the condition to the Train Dispatcher. This keeps the system safe and ensures any issues are addressed before traction power is heard or used.

Choosing only a subset of pantographs to test would miss potential failures on other units, and skipping testing altogether would be unsafe, so the required full check is essential.