Hydraulic Power Flashcards
What services operate on the number 1 hydraulic system?
FAIRP - Flaps, Anti-Skid, Inboard Roll Spoilers, Rudder Actuater (lower), PTU
What services operate on the number 2 hydraulic system?
LONER - Landing Gear, Outboard Roll Spoilers, Nose Wheel Steering, Emergency Brakes, Rudder Actuator (upper)
Primary pressure is supplied to the hydraulic system through?
Engine driven pumps
Secondary pressure is supplied to the hydraulic system through?
Electric secondary pumps
What does the standby pump operate?
When the switches are set to 1 and 2: #1 - automatically operates when the flaps are selected greater than zero degrees #2 - automatically operates when the flaps are greater than zero degrees or loss of #2 hydraulic system pressure in flight, or #2 condition lever selected to FUEL OFF in flight
What is the PTU?
Power Transfer Unit
What is the purpose of the PTU?
To assist in raising the landing gear if the #2 engine fails at take-off
When does the PTU operate automatically?
2 engine fails, landing gear selector is in the up position, sensed that the #2 engine oil pressure is dropping below 40 psi
When should the PTU be used manually?
Lower the landing gear when the #2 engine is shut down or the #2 engine driven pump fails and there is hydraulic fluid in the #2 system
What would be the indication if the hydraulic quantity guage lost electrical power?
Last reading of the gage remains on the gage and the red dots appear.
What is the minimum dispatch quantity for the #1 & #2 systems?
1 is 1.5 quarts and the #2 is 3 quarts
What is the ARPS (MOD 1893 aircraft)?
Relocation of the #2 standby pump to the tail of the aircraft and the isolation of the hydraulic system in the tail so that the rudder actuator continues to operate
How and when does the ARPS operate (MOD 1893 aircraft)?
Automatically with the loss of the #2 EDP or #2 Engine failure
When do the isloation valves close (MOD 1893 aircraft)?
Fluid volume in the related reservoir drops below a minimum quantity
