49 - Airborne Auxiliary Power Unit System (APU)
Sub-chapters
- 49-00 - General
- 49-10 - APU Assembly and Cowl Power Plant
- 49-20 - APU Core Engine
- 49-30 - APU Engine Fuel and Oil Control
- 49-40 - APU Fire Protection Start/Ignition System
- 49-50 - APU Bleed Air System Indicating/Monitoring
- 49-60 - APU Engine Controls
- 49-70 - APU Indicating System
- 49-80 - APU Exhaust System
- 49-90 - APU Oil System
- 49-97 - Apu System Wiring