Lou and other 707-fans,

According the Boeing 707 operations manual, section pneumatics systems, the engine bleed valve (1, 2, 3, 4.) allows hot bleed air for wing anti-ice.

Is this correct ? Why not using the wing valves for wing anti-ice ?

According the Boeing 707 operations manual, section pneumatics systems, the wing valves (1, 2, 3, 4.) allows hot bleed air for air conditioning and crew and main cabin temp control.

Is this correct ? Why not useing engine bleed air for ACM and temp control ?

According the Boeing 707 operations manual, section pneumatics systems, the engine bleed valve must be closed if the associated air compressor is operating.

Is this correct ? Could you explain this matter. Looks like a controdiciton.

Thanks 707-friends :D

Jan Koppen
www.oldjets.net