Which ATA chapter number corresponds to Bleed Air?

Which ATA chapter number corresponds to Bleed Air?

• A. ATA 73
• B. ATA 75
• C. ATA 70
• D. ATA 72

Answer: (B)

Bleed air is the high‑pressure air taken from engines or an APU and used to power the pneumatic systems that run environmental control, cabin pressurization, and anti-ice. In ATA documentation, these pneumatic and environmental control functions are grouped under a single chapter, numbered 75. That makes ATA 75 the best match for bleed air, since it directly covers the bleed-air/pneumatic system. The other chapter numbers correspond to different systems and don’t specifically address bleed air.

Bleed air is the high‑pressure air taken from engines or an APU and used to power the pneumatic systems that run environmental control, cabin pressurization, and anti-ice. In ATA documentation, these pneumatic and environmental control functions are grouped under a single chapter, numbered 75. That makes ATA 75 the best match for bleed air, since it directly covers the bleed-air/pneumatic system. The other chapter numbers correspond to different systems and don’t specifically address bleed air.