ATA 85 relates to which topic?

ATA 85 relates to which topic?

• A. Fuel Cell Systems
• B. Charts
• C. Oil
• D. Starting

Answer: (A)

In ATA practice, chapters map to specific aircraft systems, so each number points you to the area you’ll find related maintenance data for. The number 85 is the chapter dedicated to fuel cell systems, so ATA 85 covers procedures, troubleshooting, and maintenance for the fuel cell power system, including the stack, fuel supply, cooling, control electronics, and safety considerations. That’s why fuel cell systems is the best fit for this code. The other topics listed don’t fall under this chapter. Charts relate to documentation or navigation materials, oil covers lubrication and oil-system servicing, and starting deals with engine starting systems. They belong to different ATA chapters, not the 85 series.

In ATA practice, chapters map to specific aircraft systems, so each number points you to the area you’ll find related maintenance data for. The number 85 is the chapter dedicated to fuel cell systems, so ATA 85 covers procedures, troubleshooting, and maintenance for the fuel cell power system, including the stack, fuel supply, cooling, control electronics, and safety considerations. That’s why fuel cell systems is the best fit for this code.

The other topics listed don’t fall under this chapter. Charts relate to documentation or navigation materials, oil covers lubrication and oil-system servicing, and starting deals with engine starting systems. They belong to different ATA chapters, not the 85 series.