Fuel System Flashcards
The APU is suppled fuel from the ____ tank only.
No. 1 Tank (Left)
Main tanks are built to withstand ballistic hits from the ____ & ____.
Bottom & SIde
____ valves provide an automatic seal to prevent fuel leaks reduce possibility of fire during a helicopter crash or malfunction.
Breakaway valves
Submerged fuel boost pump output pressure is approximately ___ - ___ PSI.
25 - 27
When the No. 1 or No. 2 FUEL LOW caution light illuminates approximately ___lbs of fuel remain in the tank.
172lbs
Fuel in the AUX tanks can ONLY be transferred to ____.
The Main Tanks.
The ____ valves automatically stop refueling when the tank is full to prevent over-pressurization.
High Level Shutoff Valves
An ____ sensor detects fuel being vented overboard and illuminates an ____ light on the Fuel Management Panel.
Overflow Sensor/OVERFLOW caution light
What happens if the transfer pumps run dry?
If the transfer pumps run dry, they will fail
The Fuel Prime Boost Pump is located on top of which main tank?
No. 1 Main Tank
The fuel dump system dumps fuel at a rate of ___ Pounds Per Minute
800 PPM
Fuel dumping stops when the dump switch is placed in OFF or when the main tanks decrease to ___lbs.
172lbs
The Fuel Quantity Indicator displays fuel quantity in YELLOW strips at ___lbs and below.
200lbs
The ____ system indicates the total amount of fuel in all tanks.
Enhanced Fuel Quantity System (EFQI)
The Engine Fuel Selector Levers shutoff fuel flow to the engines at the ____.
Fuel Selector Valve
AUX FUEL or NO FUEL XFER caution light illuminates when either main fuel tank quantity drops below ____.
550lbs +/- 55
The Fuel Management Panel is located on the ____ console.
AFT
The Prime Boost Pump primes all fuel lines IF prime is lost and also acts as the ___ boost pump.
APU boost pump
Power to operate the the fuel boost pumps is provided from the _____, respectively.
No. 1 and No. 2 AC Primary Buses, respectively.
What are the three Fuel Selector Levers positions?
OFF - control valves closed
DIR - selector valves open providing fuel to each engine from it’s individual fuel tank
XFD - Connects engine to the crossfeed system
The fuel filter is located on the forward left side of the ____.
Engine accessory gear box.
An impending bypass warning is incorporated on the filter housing in the form of a button that pops at ____ psid.
6 psid
Power to operate the Prime Boost System is from the ____ bus through a circuit breaker marker FUEL PRIME BOOST.
Battery Bus
CAUTION: Excessive helicopter maneuvering with the refueling probe extended could result in ________. Also, flying with the refueling probe extended causes excessive wear on the internal parts.
inadvertent main rotor blade contact with the refueling probe.
CAUTION: Dry running the transfer pumps in ____ may cause transfer pump failure.
Manual Mode.
