Q and A Learjet 60 (Pneumatics/Air conditioning/Pressurization) Flashcards
High Press (HP) bleed air is used for ______. (4)
Press jet pump
Windshield Alcohol
Cab Temp control
Wing anti-ice
Low Press (LP) bleed air is used for _________. (4)
Windshield anti-ice
Wing anti-ice
Cabin Pressurization and Control
Hyd reservoir press
The bleed air sw controls ________. (3)
HP shutoff valve
BA shutoff valve
EMER press valve
With DC failure, (EMER press Valves / Bleed Air SOV / HP SOV) fail _________.
Closed
Open
Open
Bleed Air sw in EMER ( Bleed Air SOV / EMER Press valve / HP SOV) is _________.
Closed
Open
Closed
Bleed air sw in ON, ( Bleed Air SOV / Emer press Valve / HP SOV) is _________.
Open
Closed
Open
Bleed air sw in OFF, the ( Bleed air SOV, EMER press valve / HP SOV) is __________.
Closed
Closed
Open
Bleed air sw ON, EMER press activates automatically at ________.
9500’ or 14 500’ Cabin altitude depending on the controller setting
For EMER press not to occur until 14 500 cab alt, _______. (3)
Landing altitude set at > than 8000’
Descent of at least 1000’ from cruise
Below FL250
With EMER press, crew and cab Temp are ________.
INOP,unconditioned hot air flows in the Cabin
The (low (9500) / high (14500)) aneroids will reset at _____.
8300
13 300
The CAB AIR sw controls the _______.
Flow control valve
The Flow Control Valve fails to _________.
Open Position
To dampen surges in engine bleed air the flow control valve_________ when Open.
modulates
Cabin Air consists of _____ conditioned by _____ thru ______.
LP Bleed Air
Ram Air
an air-to-air HT exchanger
Cabin and crew Temp controls control __________.
Separate torque motors for hot-cold air mixing control
In a DUCT overheat condition _________. (2)
Duct Temp limiters de-energize torque motors
Temp control valves Close
With Cabin temp control valves open, the Freon syst ______.
Will not work !
Control of the Cabin Temp. by pax uses ________.
The Cab control panel with the Cab Temp Contol in Cabin
All environmental indicators are powered by _______.
28 VDC
The conditions for FREON system to are ____________. (5)
on the ground 1 GEN or GPU in-flight 2 GEN no lights Cab Temp control at OFF Stab-wing OFF No Starter engaged