TER. BLEED AIR/COWL PRESSURE 26 FILTER. CABIN/COCKPIT OZONE 27 NIPPLE. EXTERNAL AIR 28 SWITCH. COWL ANTI-ICE DUCT OVERHEAT (675° F) 29 VALVE, COWL ANTI-ICE PRESSURE REGULATOR & SHUTOFF 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 A