Hydraulics Flashcards
(16 cards)
Enroute DAL-ABQ and the following lights illuminate:
1. MASTER CAUTION
2. FLT CONTROL A LOW PRESSURE
3. HYD PUMPS ENG 1 LOW PRESSURE
4. HYD PUMPS ELEC 2 LOW PRESSURE
What is your assessment of the issue?
What other indications can help you confirm this is the situation?
Which checklist is applicable?
Loss of System A hydraulics.
Hydraulic quantity/ pressure indications on the MFD. Autopilot A disconnected if in use.
Use LOSS OF SYSTEM A non-normal checklist
What major systems are affected with a loss of hydraulic system A?
- AUtopilot A
- Normal Landing Gear extension/retraction
- Ground spoilers
- Engine 1 TR normal hydraulic pressure
- Normal Nose wheel steering
What does PWB take into account when computing performance data with a loss of system A?
PWB Landing Module allows performance corrections based on the specific non-normal condition that impacts performance. Non-normal conditions are grouped by system, appear in the same order as the QRH, and are titled the same in the QRH.
With the loss of hydraulic system A, can you continue to your desitination?
Yes, unless you lose another hydraulic system.
With a loss of hydraulic system A, what should you consider when in the terminal area?
When the gear has been lowered manually, it cannot be retracted. The drag penalty with gear extended may make it impossible to reach an alternate field.
MDW to DEN FL340. The following lights illuminate:
1. MASTER CAUTION
2. FLT CONTROL B LOW PRESSURE
3. HYD PUMPS ENG 2 LOW PRESSURE
4. HYD PUMPS ELEC 1 LOW PRESSURE
What is your assessment of the problem?
Loss of system B hydraulics
With a loss of hydraulic system B, what major systems are affected?
- B autopilot
- Yaw damper
- Trailing edge flaps and leading edge devices normal hydraulic pressure
- Autobrake
- Normal Brakes
- Engine 2 TR normal hydraulic pressure
- 2 spoilers on each wing
Why would you plan a flaps 15 landing with a loss of hydraulic system B?
To improve go-around capabilities
What would you do if you had a STANDBY HYD LOW QUANTITY as well as a loss of system B?
Plan to land at the nearest suitable airport
With a loss of system B, what should you consider prior to extending the flaps?
Leading edge devices cannot be retracted after extension with alternate flap extension system. The drag penalty with leading edge devices extended may make it impossible to reach an alternate field.
Before pushback, which hydraulic system must be depressurized (both pumps OFF and LOW PRESSURE lights illuminated)?
System A
The aircraft must not be towed forward unless both engines are shut down and which hydraulic system is depressurized?
System A
How can the standby hydraulic pump be activated?
Manually: by moving either FLT CONTROL switch to STBY RUD or ALTERNATE FLAPS master switch to ARM
- Automatically: in flight or on the ground with a loss of system A or B, flaps extended, and airborne (or wheel speed greater than 60 knots).
- or Force Fight Monitor activation (the FFM detects opposing pressure between A and B actuators. this may happen if either system A or B input is disconnected).
What is the significant difference in capability between an engine driven hydraulic pump and an AC electric motor driven hydraulic pump?
An engine driven pump supplies 6 times the fluid volume than the related electric motor driven hydraulic pump.
What does an illuminated OVERHEAT light on the electric hydraulic pump indicate?
the associated electric motor driven pump is overheated, OR the hydraulic fluid used to cool and lubricate the corresponding electric motor driven pump is overheated.
For which components does the standby hydraulic system provide backup for systems A and or B?
- Thrust reversers
- rudder
- leading edge flaps and slats (extend only)
- standby yaw damper
