737 Flight Crew Operations Manual
Supplementary Procedures -
Air Systems
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
SP.2.2 D6-27370-866-EGP
APU BLEED air switch ........................................................... ON
APU supplies left pack and external air source supplies right
pack.
Ground Conditioned Air Use
Before connecting ground conditioned air:
PACK switches .......................................................................OFF
Packs can be damaged if they are operated while ground
conditioned air is connected.
After disconnecting ground conditioned air:
PACK switches ............................................................. As needed
Isolated Pack Operation during Engine Start
To improve cabin air quality between starting the first and second engine:
CAUTION: Moving engine BLEED air switches while a starter is
engaged can damage the starter.
Engine No. 2 .....................................................................................Start
After engine No. 2 stabilized:
ISOLATION VALVE switch............................................. CLOSE
Right PACK switch .............................................................AUTO
Duct pressure .................................................................Stabilized
Engine No. 1 .....................................................................................Start
After engine No. 1 stabilized:
ISOLATION VALVE switch...............................................AUTO
Pressurization System Manual Mode Test
PACK switches ..................................................................................OFF
Pressurization mode selector ...........................................................MAN
AUTO FAIL and ALTN lights – extinguished.
MANUAL light – illuminated.
September 24, 2015
To Next Page
Loading...
