Handling pressurized air from the engines or APU.
| Control | Normal | Function | |---------|--------|----------| | AUTO/STBY | AUTO | Dual auto controllers | | FLT ALT | Set cruise FL | e.g., FL350 → 350 | | LAND ALT | Set destination field elevation | | | CABIN RATE | 300–500 fpm typical | Climb/descent rate | | AUTO FAIL Light | OFF | Pressurization auto fail | boeing 737800 overhead panel pdf new
| Switch/Indicator | Normal | Notes | |----------------|--------|-------| | BATTERY (switch) | ON | Connects battery to hot bus | | STANDBY POWER | AUTO | Auto selects source for standby bus | | GEN 1 / GEN 2 | ON | IDG (Integrated Drive Generator) | | APU GEN | OFF (ON if APU running) | | | BUS TRANSFER | AUTO | Auto bus tie operation | | DC METER / AC METER | Selector to TR/APU/GEN | For voltage/current monitoring | Handling pressurized air from the engines or APU
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