Systems 3 - IVHMS Flashcards
If the pilot or co-pilot feel unusual vibrations or hear unusual noises, they can use the _________ (Intermittent event) switch to obtain a snapshot of the aircraft flight condition, vibration, and cockpit noise.
HUMS-E REC
How is IVHMS data transferred from the aircraft to the ground station?
PCMCIA card
What starts/ stops the recording of the CVR/FDR (Cockpit Voice Recorder/ Flight Data Recorder)?
DCU’s
Which IVHMS main menu would a pilot need to access to perform a HIT check?
Power Checks
The Integrated Vehicle Health Management Unit (IVHMU) integrates the following helicopter health and safety capabilities: Underwater acoustic locating device, Health and Usage Monitoring System (HUMS), and _______.
Cockpit Voice Recorder/ Flight Data Recorder
IVHMS is comprised of:
- An on board system
- The Integrated Vehicle Health Management Unit (IVHMU).
- Ground Station (GS) and software for displaying, viewing, and extracting helicopter health and safety information
Functions of the IVHMS On Board System include (but are not limited to):
- Power Checks
- Main Rotor Track and Balance
- Tail Rotor Track and Balance
- Engine Output Shaft Testing and Balance
- Oil Cooler Testing and Balance
- Maintenance Card Recording
- Isolating Irregular/Unusual Vibrations
- Mechanical Diagnostics
The 29+ accelerometers monitor what?
- Temperature.
- Vibration.
- Pulse input interfaces.
- Timing references.
- General frequency input interfaces.
_____ of the accelerometers is critical to their functional accuracy.
Orientation
What are the four external audio recording interfaces?
- Area microphone (cockpit instrument panel).
- Pilot headset audio.
- Copilot headset audio.
- Composite audio (LH gunner, RH gunner, troop commander)
HUMS and CVR/FDR data downloading are _____ of one another
independent
The _____ manage the start-stop of the CVR / FDR Control
DCUs
In the event of inertia switch activation, it stops the _____, and prevents data from being _____ in the event of an incapacitating incident.
recording process
overwritten
CVR / FDR START Recording criteria:
The DCUs monitor inputs and provide an open circuit to the CVR/FDR when ANY of the following conditions exist:
a. No. 1 ENG ON (NG1 greater than 55%)
b. No. 2 ENG ON (NG2 greater than 55%)
c. Main XMSN OP greater than 20 PSI
d. WOW switch equals false (In flight condition)
CVR / FDR STOP Recording criteria:
The DCUs monitor inputs and provide a ground to the CVR/FDR when ALL of the following conditions exist:
a. No. 1 ENG OFF (NG1 less than 55%)
b. No. 2 ENG OFF (NG2 less than 55%)
c. Main XMSN OP less than 20 PSI
d. WOW switch equals true (on ground condition)
What are the 3 types of Usage Monitoring with regards to HUMS Functions
Operational Usage
Exceedance Monitoring
Regime Recognition
What does Regieme Recognition do?
Breaks each flight down into time spent in different flight maneuvers or regimes
What are the 4 types of Health Monotoring with regards to HUMS Functions
- Rotor Track and Balance
- Engine Vibe Monitoring
- Mechanical Diagnostics
- Bearing Monitoring
Mechanical Diagnostics can be acquired in what three modes:
Automatic
Prompted
Forced
The IVHMU will record data from what sources 9?
- Rotor Track and Balance (RTB).
- Engine Monitoring.
- High Speed Shaft Sensor.
- Mechanical Diagnostic Sensors.
- Bearing Monitor Sensors.
- Position Sensors.
- Event Switches.
- Exceedance Monitoring.
- Administration data.
Between a startup and shutdown you can capture up to ___ I Events
5
