PIQ C-17 Systems and Procedures Review Flashcards Preview

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Flashcards in PIQ C-17 Systems and Procedures Review Deck (49):

What does W/S DEFOG do? (-1, 1)

Electrically heats inner panes of all cockpit windows to prevent moisture from condensing on the inner surfaces, and to enhance impact resistance.


What does W/S ANTI-ICE do? (-1, 1)

Electrically heats the pilot's and copilot's windshield outer panels to prevent external condensation or ice buildup.


Is the windshield anti-ice normally on or off? (-1, 1)



When do you turn windshield anti-ice on? (-1, 2 & -1, 7)

Anytime after engine start and before engine shutdown when icing conditions are present. Temperature is 10C or below and any of the following are true:
- Visible moisture (rain, snow, sleet or ice crystals).
- Temperature and dew point are within 3C of each other, or the dew point is unavailable.
- Ramps, taxiways, and/or runways have slush/standing water on them which may impinge and freeze on exterior surfaces.

Prior to takeoff in icing conditions. If they cannot be activated during takeoff, turn them on as soon as possible once airborne and prior to entering icing conditions in the climb.

Prior to entering icing conditions. Enroute in-flight icing conditions exist when TAT is 10C (50F) or below and any of the following conditions are present:
- Visible moisture (rain, snow, sleet or ice crystals).
- Ice buildup on edges of the windshield and other visible portions of the aircraft.
- ICE message annunciated on the WAP.

If any doubt exists regarding potential for icing, should be turned on.

In decent if icing conditions are expected, turn on at least 10,000 feet above the expected icing level to provide adequate warmup time.


When would you turn on engine anti-ice immediately after engine start? In flight? (-1, 7)

When icing conditions exist. Temperature is 10C or below and any of the following are true:
- Visible moisture (rain, snow, sleet or ice crystals).
- Temperature and dew point are within 3C of each other, or the dew point is unavailable.
- Ramps, taxiways, and/or runways have slush/standing water on them which may impinge and freeze on exterior surfaces.


What does engine anti-ice do? (-1, 1)

Engine bleed air warms the inlet leading edge (the spinner is continuously warmed by internal engine air, and the blades are not anti-iced).


What constitutes visible moisture? (-1, 2)

Rain, snow, sleet or ice crystals


How does the wing anti-ice system work? What areas are heated? (-1, 1)

Bleed air is taken from the crosswing pneumatic manifold and routed through telescoping ducting to the mid and outer wing slats. The wing leading edges are not anti-iced. On the ground, an electrical interlock prevents the wing ice protection shutoff valves from opening regardless of the WING anti-ice switch position.


Describe the APU start procedure (-1, 2)

Select "RUN" and very RPM zero for 2 seconds
Select "START" and release to RUN. RPM indicator may flash value around 85% once or twice. If indicator flashes repeatedly, perform abnormal start procedure. HOT and HIGH lights may flash momentarily.

Ignition occurs at 7% RPM. As RPM passes 50% a steady decrease in EGT to approximately 375C should be seen. Ignition is de-energized at 95%.


What makes the "LOW" light on the APU control panel go out? (-1, 2)

Turning on a #3 boost pump


What does the "OFF/ARM" switch do? (-1, 1)

Press to arm the agent discharge switch and shut down the APU (if not already accomplished)


What do you do for an APU fire? (-1, 3)

ARM the ARM switch, discharge the agent, Ground Evac checklist as required.


What is the required pneumatic supply pressure for starting engines from an APU? (-1, 2)

20 PSI recommended (starter button engaged). There is no minimum main manifold pressure required.


If the APU automatically shuts down, when can it NOT be overridden? (-1, 1)

In case of indicated fire or overspeed.


If the APU is started after auto shutdown (you have overridden the APU), when do you shut down the APU? (-1, 1)

After a single engine is started. (1-168)


What does the APU override switch do? (-1, 1)

Signals the APU ECU to override all automatic shutdown protection, except indicated fire and overspeed, and illuminates the light.


What do you do if the APU Door circuit breaker is collared? (-1, 2)

Talk to MX?


How long do you wait before a restart attempt? (-1, 5)

5 minutes between start attempts


How many starts are permitted in one hour? (-1, 5)

Three start attempts per rolling one hour cycle


What makes the APU automatically shut off? (-1, 1)

Indicated fire
Loss of DC power
No acceleration
Inlet door closes
High EGT
ECU failure
Low oil pressure
Clogged oil filter
Slow start
High oil temperature
High generator oil temperature
Loss of a critical sensor


After starting the APU, what is required before turning the APU Bleed Air Switch ON?

For OBIGGS II w/o ASM ALERT faults, check for WCC-OBGxxxx faults on the MCD NON-AVIONIC FAULT LIST


What does selecting the APU Mode Sel switch to ALERT do? (-1, 1)

Selects the quick reaction APU start switch at the crew entrance door. The APU start control switch must be in the RUN position.


When the APU Alert Start feature is used, will there be any fire protection or detection? (-1, 1)

Not until the battery bus is powered.


What do you do if the APU PWR AVAIL light on the electrical panel does not illuminate immediately after the APU has been started? (-1, 2)

Momentarily hold the APU power switch in the reset position, return APU PWR switch to ON, and observe that the APU PWR AVAIL light illuminates.


What is the normal configuration for the Electrical system? (-1, 1)

Split parallel


What are the other possible modes for the Electrical system? (-1, 1)

All IDG parallel
IDG isolated


How would you recognize a generator failure in the "Split Parallel" mode? (-1, 1)

ELECT cue on the WAP, MASTER CAUTION light. The load of the failed IDG is assumed by the remaining generator on the same side.


How would you recognize a generator failure in the "isolated" mode? (-1, 1)

ELECT cue on the WAP, MC light, and loss of components on the associated generator bus.


How many channels can one engine generator power? (-1, 1)



Which is the most important electrical bus/channel?

Two, as it is the normal power source for the AC Emergency Bus.


Which engine should be started first using Battery Start procedures? (-1, 2)

Two. Will allow hydraulic transfer pump to supply pressure for the No 3 engine start.


How many buses can be powered with battery power only? What are their names? (-1, 1)

1 Battery Direct bus. Battery Bus can be powered by any TR.


What bus is always powered? (-1, 1)

Battery Direct bus


Discuss generator bus priority with one engine generator working. (-1, 1)

1st preference for all generators is generator bus 2 as the normal power source for the AC Emergency Bus.


The batteries provide emergency power for _______ __________ (-1, 1)

? The battery direct bus, battery bus, AC/DC emergency buses (if EMERG PWR switch is ON, through static inverter on DC emerg bus) for up to 1/2 hour.
Also, single point refueling in absence of APU or external power.


How long does it take to recharge a fully discharged aircraft battery? (-1, 1)

1.5 hours


Why is there a light for the DC XFER bus fail, but not for the AC XFER bus? (-1, 1)

AC XFER BUS illuminates on the WAP, but if the DC XFER bus fails, the WAP is not powered.


What does a TR (transformer rectifier) do? (-1, 1)

Converts AC to 28 VDC power.


How do you know if you've lost one TR? (-1, 1)

You don't. Loss of a single TR poses no significant in-flight hazard and is not announced on the WAP.


What would your indications be for an electrical fire? (-1, 3-105)

? Smoke cue, failed electric components? Yellow/acrid smoke/fumes ?


What are you checking for after the battery switch is placed in the "ON" position (big picture)? (-1, 2)

Cockpit annunciators and switchlights come on at full bright intensity.


What is the primary AC electrical channel? (-1, 1)

2. Normal source of power for AC Emergency bus


What is the primary DC electrical channel? (-1, 1)

3? DC Bus 3, AV Bus 3, DC XFER BUS, DC EMER BUS. Shares battery bus with 2.


What are the sources of power for the EMER AC bus?

Either Gen Bus 2 or 3, or through an inverter powered by the batteries.


(Interior Inspection) Describe what is being checked as the emergency power system is being powered up. (-1, 2)

EMERG PWR IN USE, BDHIs not powered. DME windows blank.
Checking if batteries are powering Emergency Buses when they are the only source of power. Illuminates when batteries are powering the AC Emrgency Bus, via static inverter, or the DC Emergency Bus directly.


What is the purpose of the avionics bus switches? (-1, 1)

No function in-flight. OFF position removes power from the buses with WOW and no engine running to preclude an overheat. AUTO engages temperature sensor which would preclude overheat. ORIDE keeps them running on the ground, overriding temperature sensor. May be used when operational necessity dictates.


What does the static inverter do? (-1, 1)

Converts DC to AC power supplying the AC Emergency bus. Static inverter is not powered in normal operations.


What is important about not de-powering the transfer buses immediately during the Loss of All Generators checklist? (-1, 3)

Reversion of flight controls to mechanical mode. Need to get to FL200 or below and in stabilized flight, with speed less than 290 KCAS. Will also lose redundant copilot navigation and communications.


How do you know if an external power unit is compatible with the C-17? (-1, 1)

External Power AVIL Light illuminates on the ESCP and External Power Control Panel if voltage, frequency, and phase sequence are acceptable.