F 30 VALVE, CHECK BLEED AIR DOOR SEAL SYSTEM 31 VALVE. SOLENOID A & B. H.P. VALVE CONTROL 32 SWITCH. BLEED AIR OVERTEMP (550O F) LEGEND BLEED AIR & AIR COND. DISTRIBUTION LINES PNEUMATIC CONTROL SYSTEM ELECTRICAL LINES 31256C00 Pneumatics System Block Diagram Key Figure 3 PRODUCTION AIRCRAFT SYSTEM