Ch 2 (Systems) (Part 1) Flashcards
Up to page 2-61.
The AH 64D is a ___-___ main rotor system with ___ lead-lag dampeners.
Fully articulated
Elastomeric
The AH 64D tail rotor is a ___-___ design.
Semi rigid.
What is the diameter of the main rotor?
48 feet
How long is the AH 64D from the back tip of the tail rotor to the forward tip of the main rotor?
58 feet, 1 inch
How tall is the AH 64D from the ground to the top of the whip antenna?
17 feet, 6 inches
What is the turning radius of the AH 64D?
37 feet, 6 inches
During canopy jettison, how far can fragments travel?
Up to 50 feet.
What height should the seats be adjusted to during all flight operations? Why?
Boresight level for MPD viewing angles
The shoulder harness lock will engage with an accelerative force of __ Gs. If the webbing is exposed to an acceleration of __ Gs, the harnesses will remain locked until the lock is moved from the forward to aft position again.
6, 2.5
Should polarized sunglasses be worn in the A/C?
No, makes shit appear black.
When on the APU and power levers OFF, the MPDs will enter a screen-saving function if no buttons have been pressed within the preceding ___ minutes.
5 minutes.
Changing the map scale on the TSD page affects only the control and display of the map scale on that MPD (T/F)
True
When either MPD is in MONO mode, labels which are shown in red or yellow are depicted how?
Bold
What does a white triangle next to a button selection on an MPD mean?
That a command failed.
If data is invalid or missing on an MPD, what symbol (and color) will appear?
White question mark.
What page does the helicopter default to when there is a warning with an audio message?
Engine page
What are the two conditions where the ENG page will not autopage to the left MPD?
When an ENG page is on the right MPD
When there is a FLT page on the left MPD
What pages are displayed when the following actions are taken:
EMERG HYD button
Sight Select FCR
ENG start
ENG
FCR
ENG
What is a way to quickly move your cursor from one MPD to another?
Double-bumping
When will the cursor be automatically stowed in the lower left hand side of the MPD?
After 3 minutes
Selecting MASTER OFF on the COM -> INIT -> MSN page will turn off what components ?
FCR, TADS and PNVS to OFF
IDM and DTU to STBY
Mode 4 codes will be dropped after how long without power? Following the selection of the button, how long must the A/C be in the air before the button must be selected again?
20 seconds, 60 seconds
What is the purpose of IDM INHIBIT?
Prevent automatic message transmits
How many characters can be stored on one line of the keyboard unit (scratch pad)?
44 total, 22 displayed on the KU at one time
How do you reset the timer on the EUFD?
By holding the timer button by more than 2 seconds.
What are the four sections of the engine?
Hot, Cold, Accessory, Powertrain
What components are mounted on the Cold section of the ENG?
DECU, history recorder, ignition system
What components are mounted to the Powertrain section of the ENG?
The thermocouple harness, TQ and overspeed sensor, and Np sensor.
How does the engine remove particles from the air as it passes through the Cold section?
The swirl frame swirling action uses centrifugal force. Those particles are then dumped out of a nozzle.
When will the ENG anti-ice system be manually selected ON?
When there is visible moisture and the FAT is less than +5*C
What type of fuel pump exists on the ENGs?
Suction
When you see ENG ## FUEL BYPASS, what does that mean?
The filter element detects differential pressure, which indicates impending bypass.
What is the purpose of the HMU? What are the overspeed parameters?
Meter the fuel to the combustor to control Ng speed. 110%, plus or minus 2. It cuts off fuel flow to the cumbustor, which causes the engine to shut down.
What kind of inputs does the HMU respond to?
Mechanical inputs from the Power Available and Load Demand spindles.
What is the purpose of the ODV?
Responds to a signal from the DECU, which causes a solenoid to close, thus routing fuel back to the HMU. The engine will NOT automatically restart.
What functions does the DECU provide?
Load sharing / Tq matching (contingency power enabled below 51%)
Torque spike suppression below 35% Np
Alternate power from the opposite engine’s alternator or by GEN power.
Hot start prevention (TGT greater than 900*C)
Max TQ Rate Attenuator
TGT Limiting
Fault Code validation
What spindles does the Alternator provide?
What indication will be lost when the Alternator is lost?
- Ng
- Ignition
- DECU
Ng will be lost.
How long will the ENG be able to provide emergency oil lubrication? Where does the oil come from?
30 seconds at 75% Ng
The oil comes from sump A & B and are pushed to engine bearings by air jets.
What is the purpose of the liquid-to-liquid cooler?
Transfers heat from the oil to the fuel
What type of chip detector gives you the ENG ## CHIPS caution?
Integral magnet and a electrical connector