APU
non bypassable
What allows current to flow in only one direction?
Power diode
What is the maximum turn in degrees allowed with the nose wheel and column assembly?
60 degrees
What is the Pounds Per Minute (PPM) rating for each of the air conditioners?
90 PPM
All fuel tanks may be fueled individually by means of over-the-wing fueling except the which tanks?
Auxiliary tanks
What controls the flow of bleed air from the APU?
Load control valve
What component steps 28 VDC to 8 VDC?
Low voltage power supplies
What component controls hydraulic fluid flow to the steering cylinders?
The steering control valve
What temperature does the underfloor heat temperature control valve modulate to maintain?
73 degrees
How many U. S. gallons does the outboard vent collector tank hold?
8 US gallons
Where is the APU starter mounted?
on the accessory gearbox
What prevents power transients and power interruptions to essential and main DC buses when transferring from external power to aircraft power?
Time delay relay
What components serve as downlocks, preventing MLG from retracting when the aircraft is on the ground?
Friction Washers
What are the two hard panels to control air conditioning?
AIR COND and PRESSURIZATION control panels
How do you turn the boost pump on and what are the PSI limit?
Engine start switch to run/ 15-24 PSI
What component actuates and sends a signal to the MC via BAU when the APU door is not fully closed?
APU door open switch
Where are generator contactors located?
Mounted on upper main AC panel
To what pressure in PSI does the aileron pressure reducer reduce the aileron booster output pressure?
2,050 (+/-) 50 PSI
When the pressurization is selected to MAN and the MANUAL VALVE CONTROL rocker is manipulated, what valve is the operator controlling?
the outflow valve
Where is the fuel pressure transducer located?
Number 3 dry bay
What switch closes the fuel shutoff solenoid valve to shut down the APU in the event of a low oil pressure?
Oil pressure sequencing switch
What are the six DC buses?
Main, Essential, Isolated, Avionics, AV Battery, Utility Battery
Where is the parking brake valve located?
Overhead tension tie in cargo compartment just forward of the center wing box
What percent of moisture does the water separator remove?
70% to 85%
How many fuel quantity probes are located in the inboard an outboard tanks?
Inboard: 4
Outboard: 5