In ATA-100 maintenance documentation, where would you find instructions for inspecting and servicing an airborne APU engine?

In ATA-100 maintenance documentation, where would you find instructions for inspecting and servicing an airborne APU engine?

• A. In the flight crew operating manual.
• B. In the general aircraft maintenance section.
• C. In section 49-20.
• D. In the engine overhaul manual.

Answer: (C)

In ATA-100 documentation, maintenance data are organized by system, with specific procedures for each component placed in the section that covers that system and its accessories. For inspecting and servicing an airborne APU engine, you look in the part of the manual that deals with powerplant systems and their accessories, under the subsection dedicated to the APU. That’s where routine inspection intervals, servicing steps, lubrication, and checks for the APU are documented. The flight crew operating manual is about flight operations and limitations, not maintenance procedures. The general aircraft maintenance section is too broad and wouldn’t include the precise APU servicing instructions. The engine overhaul manual covers major overhaul work, not routine inspection and servicing. So the correct place is the APU maintenance procedures within the powerplant section of ATA-100.

In ATA-100 documentation, maintenance data are organized by system, with specific procedures for each component placed in the section that covers that system and its accessories. For inspecting and servicing an airborne APU engine, you look in the part of the manual that deals with powerplant systems and their accessories, under the subsection dedicated to the APU. That’s where routine inspection intervals, servicing steps, lubrication, and checks for the APU are documented.

The flight crew operating manual is about flight operations and limitations, not maintenance procedures. The general aircraft maintenance section is too broad and wouldn’t include the precise APU servicing instructions. The engine overhaul manual covers major overhaul work, not routine inspection and servicing. So the correct place is the APU maintenance procedures within the powerplant section of ATA-100.