Pneumatics Flashcards
How would the bleeds and packs be configured for take off using ATL-TO if the crew elects to shut down the APU prior to takeoff?
Engine Bleeds: OPEN
APU Bleed: CLOSED
XBLEED: AUTO
PACKS 1 &2: ON
How would the bleeds and packs be configured for an Icing T/O?
Engine Bleeds: OPEN
APU Bleed: CLOSED
XBLEED: AUTO
PACKS 1 &2: ON
How wold the bleeds and packs be configured for a takeoff using T/O or E-T/O thrust in non-icing conditions if the crew wants to ensure the PACKS operate during takeoff?
Engine Bleeds: CLOSED
APU Bleed: OPEN
XBLEED: OPEN
PACKS 1 & 2: ON
With the XBLEED knob in the AUTO position, when will the XBLEED valve open automatically
When an engine is being started using a pneumatic source from the other side
Regarding the priority logic of the available bleed sources, if the APU Bleed was selected open, what would occur after opening the engine 1 bleed valve
The APU bleed valve would close
What is the indication of a bleed leak?
A red “LEAK” inscription appears over the button of the affected bleed and a “BLD 1(2) LEAK master warning on the EICAS
What indications would be visible on the APU bleed valve button if the APU is OFF and the bleed valve is selected OPEN
White line only
For non-icing takeoffs using T/O or E-T/O thrust, is it mandatory that the APU be used as a pneumatic source for the PACKs during the take off
No
an APU off Take off can be flown
While taxiing in icing conditions, is it possible for the APU bleed to be used on the ground for the PACKs while simultaneously using engine lip anti-ice protection?
Yes the bleed air for Lip A/I does not require the engine bleed valve to be open
What is the procedure for a cross bleed engine start
Operating Engine Bleed:OPEN APU Bleed: CLOSED XBLEED: OPEN (or AUTO) Increase operating N2 to 83% Start stop on starting Engine Run(2 sec), Start, Run
