SV Air Systems Flashcards
757/767 if the pack automatic control system failed, what would be indicated
The INOP light only
757/767 the AUTO RATE knob sets limit … index mark establishes approximately ___ FPM climb and ___ FPM descent limit
500,300
757/767 the FWD cab compartment temperature inop light is illuminated. What is a possible cause
Fault or overheat in the zone temperature controller
767 the right engine bleed air overheat light is illuminated. What does this indicate
An engine bleed air overheat
757/767 the auto inop light is illuminated, what could cause this?
Both auto controllers have failed
757 the two cargo compartments are heated by discharge air… supplemental heating is accomplished by
An electric heater in the duct downstream of the fan
757/767 the R pack has shut down due to the compressor temperature exceedance … is that the correct indication
Yes the inop and pack off lights should be illuminated
767 eicas advisory message fwd eqpt smoke displays and ____
The smoke light illuminates
767 the equipment cooling system NO COOLING light is illuminated. What position is the switch in
OVRD
757/767 On the ground when does the pressurization system begin pressurizing the aircraft
When the throttles are advanced for takeoff
757 the right engine bleed air off light is illuminated what is the position of the right engine bleed air valve
Closed
757/767 on the cabin altitude control panel, the auto inop light is illuminated
MODE SELECT switch is in MAN
757/767 what will occur if the selected auto 1/2 controller fails
Control is automatically switched to the other controller
757 757: Air is circulated through the forward E/E racks by one of two supply fans. If the operating fan fails, what starts the alternate fan?
Pressing the EQUIP COOLING switch to the ALTN position
757: The right engine BLEED light is illuminated. What does this indicate?
The right engine bleed air temperature is excessive
757/767: What will the pack do when both the INOP and PACK OFF lights illuminate?
Shut down
757/767: If there were to be excessive pack outlet temperature, which lights) would illuminate?
INOP only
757/767: On the ground, what would cause the high flow schedule to be automatically activated for both packs during single-engine taxi?
APU supplying air to both packs
767: The equipment cooling system OVHT light is illuminated. What caused it’s illumination?
There is low airflow or high temperature sensed
757/767: The engine bleed air valves (pressure regulating and shut off valve [PRSOV) are
Electrically controlled and pressure actuated
757/767: The pressurization system is in the automatic mode when the cabin altitude mode selector is set to AUTO 1 or AUTO 2. According to the graphic, what would the pressurization system do if the AUTO 2 controller were to fail?
Control is automatically switched to the AUTO 1 controller
767: The equipment cooling system VALVE light is illuminated. What is a possible cause for it’s illumination?
One or more forward equipment cooling supply or exhaust valves are not in their commanded position after engines are started
757/767: The high flow schedule is automatically activated to provide higher-than-normal air flow when
One pack is inoperative
757: High flow to the opposite pack is inhibited when:
The RPM of either engine falls below a preset value
757: The APU BLEED AIR VALVE light is illuminated and EICAS advisory message APU BLEED VAL is displayed. What does this indicate?
The APU bleed air valve is not in the commanded position
757: The ISOLATION VALVE light is illuminated. What does this indicate?
The isolation valve is not in the commanded position
757: The left engine HI STAGE light is illuminated. What does this indicate?
The left engine bleed system pressure is excessive and the engine high pressure bleed air valve is automatically locked closed
753/767: The aircraft is divided into temperature zones.
4
757/767: If a return to the departure airport is necessary, how must the crew set the pressurization
The landing altitude must be roset for return to the departure airport
757/767: If you position one of the compartment temperature control knobs to the OFF position, what will happen?
The associated compartment INOP light will illuminate
757: The right DUCT LEAK light is illuminated. What does this indicate?
A high temperature bleed air leak is detected
