PPRuNe Forums - View Single Post - B777 difference between APU to Packs and Packs off T/O
Old 14th Jun 2016, 08:36
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VNAV PATH
 
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APU to pack takeoff configuration (when selested on Take off FMC page):

• left engine bleed valve is closed : L ENG OFF light is illuminated

• APU provides air to ADP C1 and to left pack

• center bleed isolation valve is closed

• the right engine provides bleed air to ADP C2

• the right pack valve is closed, and the R PACK OFF light is illuminated


Should have written : When APU to Pack is used there is only one engine bleed AND one pack



Sad I cannot find a good schematics dispaly from my doc.

Last edited by VNAV PATH; 14th Jun 2016 at 08:43. Reason: editing my initial message
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