Global 7500 Practice Flashcards - File 3

Vocabulary-style flashcards covering fuel systems, engine limitations, oil management, and APU operations for the Global 7500.

Center Tank to Wing Inner Tank Fuel Transfer

Begins when inner wing tank quantities decrease to about $14,000\,lb$ and continues until they reach approximately $15,000\,lb$.

Aft Tank to Wing Inner Tank Fuel Transfer

Begins when either wing inner tank quantity decreases to $6,800\,lb$.

Wing Outer to Inner Tank Depletion Threshold

The wing outer tanks deplete into the wing inner tanks when inner tank quantities decrease to about $10,850\,lb$.

APU Fuel Source

Normally provided by the Right wing collector tank.

Longitudinal CG Control Inhibition Factors

CG control is inhibited if the CG CTRL PBA is pressed, if wing-to-wing transfer is active, or if wing inner tank fuel reaches $10,850\,lb$.

Manual Wing-to-Wing Transfer Monitoring

Required because there is no automatic shutdown or overfill protection provided for the manual system.

Refuel/Defuel Panel Power Source

MAIN BATT BUS; this allows refueling without requiring external or airplane-generated power.

SOV FAIL Message (Refuel Pre-test)

Indicates that fuel flow will not stop automatically when the tank is full.

Global 7500 Engine Model

General Electric (GE) Passport 20-19BB1A.

Maximum ITT Limits

$750ºC$ for Ground starts, $875ºC$ for Air starts, and $975ºC$ for Quick Windmill Relight.

Takeoff Thrust Limitations

Limited to $5$ minutes with all engines operating and $10$ minutes with one engine inoperative.

Max Starter Engagement RPM

$56\%\,N2$; engagement above this value is not possible due to the starter clutch design.

Starter Duty Cycles (1-2)

$5$ minutes ON, followed by a $5$ minute cool down between starts.

Starter Duty Cycles (3-10)

$5$ minutes ON, followed by a $15$ minute cool down between starts.

Minimum Engine Start Oil Temperature

$-40°C$, indicated when the value turns GREEN.

TO Power Oil Temperature Requirement

Minimum of $+43ºC$ before selection, indicated when the value turns GREEN.

Maximum Continuous Oil Temperature

$160°C$, indicated when the value turns RED.

Sea Level Engine Thrust Rating

$18,920\,lb$ at sea level up to $30ºC$ (ISA+$15ºC$).

FADEC Power Sources

The Permanent Magnet Alternator (PMA) is the primary source; aircraft power is used during starting or PMA failure.

Maximum Engine Oil Consumption

$0.31\,\text{US quarts/hour}$ ($0.29\,\text{liters/hour}$).

Engine Oil Replenishment Requirements

Engines OFF on ground, between $15$ and $60$ minutes after shutdown, OAT higher than $-12°C$, and ORS reservoir GREEN.

Oil Replenishment Tank Location

Aft equipment bay.

Oil Replenishment Reservoir Capacity

$6.0\,\text{U.S. quarts}$ ($5.7\,\text{liters}$).

Engine Oil Cooling System

Utilizes $2$ Fuel/Oil and $2$ Air/Oil heat exchangers.

Usable Engine Oil Tank Capacity

$11.6\,\text{U.S. quarts}$ ($10.9\,\text{liters}$).

Engine Run Switch OFF Action

Closes the HPSOV within the fuel metering unit.

Approach Idle Criteria

In flight, Gear down and locked OR SLAT/FLAP $2$ (flaps set $\geq 5º$), provided Steep Approach Mode is not selected.

Auto Start Air Envelopes

ATS ENVELOPE ($0\,\text{kt}$ CAS) and WINDMILL ENVELOPE ($> 250\,kt$ and $N2 > 7.5\%$).

Engine Quick Relight Function

If the ENGINE RUN switch is toggled OFF then ON, the FADEC recovers power settings with adapted fuel schedules and ITT limits.

ENG FLAMEOUT Message Trigger

Appears when $N2$ reduces abnormally and an automatic relight attempt has failed.

Airborne Engine Start Altitude Limits

Maximum of $30,000\,ft$ for standard airborne start and $23,000\,ft$ for APU-assisted start.

Thrust Reverser Limitations

Must not be selected in flight, not permitted for touch-and-go landings, and may not be used to back up the airplane.

Thrust Reverser Actuation Power

Actuated by the respective engine hydraulic system and only operates when the associated engine-driven hydraulic pump is pressurized.

Thrust Reverser Unlocked Indications

Red Master Warning, 'L (or R) REVERSER UNLOCKED' aural alert, red REV icon in N1, and FADEC thrust limit to idle.

APU Model

SPU300.

Maximum APU RPM

$105\%$, though the FADEC normally governs it to $100\%$.

APU Operational Altitude Limits

$51,000\,ft$ for generator ops, $45,000\,ft$ for starting in flight, and $25,000\,ft$ for bleed air extraction.

Minimum Cold Soaked APU Start Temperature

$-40°C$ on the ground.

APU Start Attempt Limit

$3$ attempts per hour.

APU Bleed Air OAT Ground Limit

Maximum $48°C$ for air conditioning operations.

APU Load Ratings

$60\,KVA$ up to $45,000\,ft$; reduced to $40\,KVA$ above $45,000\,ft$.

APU BCV Manual Operation Restrictions

Inhibited if Anti-Ice is active, LH engine PRV is manually opened, or RH engine PRV and crossbleed valve are manually opened.

APU Door Failed Open Dispatch

Permitted with restrictions, primarily to manage the APU windmilling without lubrication (windmill limit $7\%$).