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34 Cards in this Set
- Front
- Back
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How many seconds must you wait between attempted APU starts? |
(maximum of 3 attempts, if 3rd attempt fails you must wait 55 minutes for start motor cool down) |
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During a wing/APU fire on the ground, after you have verified a fire with the fire guard, your next step should be to_________.
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Execute Emergency Shutdown |
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If the APU system SBIT indicates a FAULT what will you see on the MFD WRA TEST status page?
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component |
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Electrical operating power for the APU engine system consists of ________. |
28 Volts Direct Current (VDC) |
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What are the five EMERGENCY SHUTDOWN steps? (this question is go/no go)
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2. APU STOP (as required) 3. Battery OFF 4. Egress (as required) 5. Ground Control ALERTED |
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What components are driven by the MWGB during APU operations?
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No. 3 Hydraulic pump, Oil Cooler Blower, Shaft Driven Compressor (SDC) |
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________ shall not be selected for normal operation of the APU, damage to the ACFT may occur.
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Emergency Run/Engage |
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T/F. APU is limited to ground operations?
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True |
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During APU crank mode a time-out feature limits this operation to _________. |
30 seconds maximum |
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T/F. The APU can only be started with external power applied?
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False |
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T/F. The APU system interfaces with the MWGB to provide electrical, hydraulic, pneumatic power?
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True
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Automatic shutdown protection is not provided for which situation?
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Low fuel pressure. |
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DISABLED if any wing/midwing panels are removed? |
True |
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Fuel is supplied to the APU from the _______? |
RH feed tank. |
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If the APU fails to start after 3 attempts, the APU start motor shall be allowed to cool for _____ minutes before next attempt. |
55 minutes minimum |
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The APU is labeled, ______, ______, ______, ______, and ______. |
Run/Disengage Emergency Run/Engage Crank STOP |
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T/F. A maintenance/VSLED download is required after every APU run?
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False |
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The #3 hydraulic system pressure should read between ____ - ____.
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4600-5250 psi |
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detection/protection is available? |
True |
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When the APU is started which generator(s) is/are on-line?
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Constant Frequency Generator (CFG) #1 |
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The WFPS is located on which PDP? |
PDP 3 |
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The first step of the APU checklist is ______. |
Aircraft safe for maintenance. |
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During Run/Disengage mode the APU will preform the same function as Run/Engage mode except the ______. |
Clutch |
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At what temperature must the APU clutch be preheated for 15-30 minutes? |
- 25 Degrees F and below |
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Pertaining to APU operations, what is not checked for servicing at the GRDP?
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CFG #1 |
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When operating the APU in CRANK mode, how long will the APU motor?
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30 seconds. |
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The APU engage ASI will show up on the ______.
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CDU |
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What is the minimum battery voltage required for APU start? |
23.5 Volts |
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What is the first step in the wing/APU fire checklist? |
Verify APU fire with fireguard
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T/F. To prevent inadvertent actuation, the NAC CONT DSBL switches shall be selected to DSBL anytime nacelles are in flight ready?
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True |
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The APU ignition is initiated with two igniters which receive _______ volts from the ignition exciter.
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5000 |
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Once the APU has started, the fuel system will maintain what constant turbine speed?
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98%-102% |
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percent of the APU self-sustaining speed of 100%? |
50% |
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What is the last step of a wing/APU fire on the ground?
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Alert Ground Control |
