Oral Prep Air Bleed Flashcards
What does a Fault light indicate?
Bleed valve disagreement
Associated bleed valves auto close when?
Overheat
Overpressure (>80psi)
Leak
Fire Handle Pulled
Uptrim triggered on one of the engines
Prop brake on (Eng 1 Bleed valve close)
What causes an OVHT light
Either bleed duct temp thermal switch +274c
What causes a Leak light?
Activates when temperature detected by bleed loop exceeds 156c.
after 1 sec follow valves auto close
bleed
hp
pack
GND X FEED
WHEN A LEAK LIGHT ILLUMINATES WHAT VALVES CLOSE?
after 1 sec follow valves auto close
bleed
hp
pack
GND X FEED
ENG 1/2 BLEED PB FACTS
PB CONTROLS BOTH THE HP AND BLEEP VALVES
VALUE IS ELECTRONICALLY CONTROLLED AND PNEUMATICALLY OPERATED
SPRING LOADED CLOSED
VALUE IS INHIBITED DURING ENGINE START
WHAT CAUSES A FAULT ON EITHER PACK VALVE
PACK VALUE DISAGREEMENT WITH PB
OVHT DOWNSTREAM OF ACK COMPRESSER IS >204C
TO OPEN A GRD X FLOW THE AIRCRAFT MUST?
BE ON THE GROUND!
WHAT IS THE COMPT TEMP FLOW BUTTON NORM AND HIGH PSI
NORM 22PSI
HIGH 30PSI
DUCT TEMP PAST THE MIXING CHAMBER IS LIMITED HOW?
WHEN DUCT TEMPERATURE DWNSTREAM OF MIXING CHAMBER IS >88C, THE PNEUMATIC TEMP LIMITER CLOSES THE TEMPT CONTROL VALVE
OVHT ON TEMP SEL PB
DUCT OVERHEAT >92C
FAULT LIGHT ON RECIRC FAN 1/2
FAN LOW SPEED OR MOTOR OVERHEAT
NO AUTO DESELCTED
AVIONICS VENT GAURDED SWITCH IS NORMALLY IN
AUTO
UNDER WHAT CONDITIONS CAN YOU SELECT FULL OPEN ON AVIONICS VENT IN FLIGHT
IN EMERGENCY, THE FULL OPEN POSITION IS POSSIBLE ONLY IF THE DELTA P IS <1
WHAT CAUSE AVIONICS VENT FAULT
OVBD VALVE IN DISAGREEMENT WITH OVBD VALUE SW POSITION
