2.17.2 Air Conditioning System

Question 1

Where does preconditioned ground source air enter the air conditioning system?

Answer 1

Mix manifold

Question 2

The air conditioning system provides temperature-controlled air from what sources?

Answer 2

Bleed air from engines, APU, or a ground air source in the air conditioning packs

Question 3

Caution regarding BAT switch when air conditioning is being operated from a ground pneumatic cart

Answer 3

The BAT switch shall always be on when air conditioning is being operated
from a ground pneumatic cart since the protective circuits are dc. This
ensures protection against damage to the air conditioning distribution system
in the event of loss of ac power.
-From ‘A1-P8AAA-NFM-000,’ page 315

Question 4

The APU is capable of supplying bleed air for ____ PACK(s) on the ground, and ___ PACK(s) in flight.
-From ‘A1-P8AAA-NFM-000,’ page 317

Answer 4

The APU is capable of supplying bleed air for two PACKs on the ground, and one PACK in flight.
-From ‘A1-P8AAA-NFM-000,’ page 317

Question 5

Note regarding APU as the only bleed air source during ground operations

Answer 5

With the APU as the only bleed air source
during ground operations, maximum airflow
may be provided to the flight deck and cabin
with the APU BLEED switch ON and either or
both PACK switches in HIGH.
-From ‘A1-P8AAA-NFM-000,’ page 319

Question 6

Where does conditioned air for the cabin come from?

Answer 6

Either the aircraft air conditioning system or preconditioned ground source