Systems 3 - IVHMS

Question 1

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.

Answer 1

HUMS-E REC

Question 2

How is IVHMS data transferred from the aircraft to the ground station?

Answer 2

PCMCIA card

Question 3

What starts/ stops the recording of the CVR/FDR (Cockpit Voice Recorder/ Flight Data Recorder)?

Answer 3

DCU’s

Question 4

Which IVHMS main menu would a pilot need to access to perform a HIT check?

Answer 4

Power Checks

Question 5

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 _______.

Answer 5

Cockpit Voice Recorder/ Flight Data Recorder

Question 6

IVHMS is comprised of:

Answer 6

• 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

Question 7

Functions of the IVHMS On Board System include (but are not limited to):

Answer 7

• 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

Question 8

The 29+ accelerometers monitor what?

Answer 8

1. Temperature.
2. Vibration.
3. Pulse input interfaces.
4. Timing references.
5. General frequency input interfaces.

Question 9

_____ of the accelerometers is critical to their functional accuracy.

Answer 9

Orientation

Question 10

What are the four external audio recording interfaces?

Answer 10

1. Area microphone (cockpit instrument panel).
2. Pilot headset audio.
3. Copilot headset audio.
4. Composite audio (LH gunner, RH gunner, troop commander)

Question 11

HUMS and CVR/FDR data downloading are _____ of one another

Answer 11

independent

Question 12

The _____ manage the start-stop of the CVR / FDR Control

Answer 12

DCUs

Question 13

In the event of inertia switch activation, it stops the _____, and prevents data from being _____ in the event of an incapacitating incident.

Answer 13

recording process

overwritten

Question 14

CVR / FDR START Recording criteria:

Answer 14

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)

Question 15

CVR / FDR STOP Recording criteria:

Answer 15

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)

Question 16

What are the 3 types of Usage Monitoring with regards to HUMS Functions

Answer 16

Operational Usage

Exceedance Monitoring

Regime Recognition

Question 17

What does Regieme Recognition do?

Answer 17

Breaks each flight down into time spent in different flight maneuvers or regimes

Question 18

What are the 4 types of Health Monotoring with regards to HUMS Functions

Answer 18

• Rotor Track and Balance
• Engine Vibe Monitoring
• Mechanical Diagnostics
• Bearing Monitoring

Question 19

Mechanical Diagnostics can be acquired in what three modes:

Answer 19

Automatic

Prompted

Forced

Question 20

The IVHMU will record data from what sources 9?

Answer 20

1. Rotor Track and Balance (RTB).
2. Engine Monitoring.
3. High Speed Shaft Sensor.
4. Mechanical Diagnostic Sensors.
5. Bearing Monitor Sensors.
6. Position Sensors.
7. Event Switches.
8. Exceedance Monitoring.
9. Administration data.

Question 21

Between a startup and shutdown you can capture up to ___ I Events

Answer 21

5