Bleed Air/AC/Press. Flashcards
The APU provides bleed air to the ____ (L/R) duct
Left side of the system
A high pressure external air connection provides bleed air to the ____ (L/R) side of the system
Right
Bleed air is used for: (6 options)
Engine starting
Engine anti ice
Wing anti ice
Air conditioning and pressurization
Water tank pressurization
Hydraulic reservoir pressurization
The ___ Stage, or ____ pressure stage, is the primary source of bleed air from the engine
5th stage or low pressure stage
When the ___ (#) stage air is insufficient for bleed system requirements, the ____ (high/low) stage valve in the ___ (#) stage, modulates open to maintain adequate pressure
5th
High
9th
T/F
When the engine is not running the bleed valve automatically closes.
True
The normal position of the engine bleed air switch is in the ____ position
ON
What does an illuminated BLEED TRIP OFF light mean?
The pressure regulating shutoff valve (PRSOV) has exceeded a predetermined limit for pressure/temperature and the engine bleed valve has closed automatically.
The TRIP RESET button on the bleed air panel does what?
Resets the pressure regulating shutoff valve (PRSOV) when the over pressure or over temperature condition has dissipated
With the ISOLATION VALVE in AUTO, what causes the valve to close?
Both engine bleed air switches on
Both pack switches in AUTO or HIGH
With the ISOLATION VALVE in AUTO, what causes the valve to open?
Placing any one of the pack or engine bleed air switches to OFF
The isolation valve position is not affected by the ______ or _____
APU BLEED switch
Ground high pressure air supply
The isolation valve is ____ (AC/DC) operated
AC
The APU can provide bleed air for ___ packs on the ground? In flight?
Two packs on the ground
One pack in flight
APU bleed air is available up to an altitude of ____
17,000 ft
After the APU has been started, when can bleed air be supplied?
One minute after APU GEN OFF BUS light has illuminated
What does the DUAL BLEED light indicate?
What causes it to illuminate?
It illuminates to remind you that a back pressure of air to the APU is possible
It illuminates based off switch position and is independent of engine operation. Caused by two conditions:
- APU bleed air valve is open and the engine 1 bleed air switch is ON
- APU bleed air valve is open, the engine 2 bleed air switch is ON, and the isolation valve is open
With the DUAL BLEED light illuminated after engine start, the crew should not ___
Operate the engines above idle thrust