Fuelish Decisions
This is where each fuel tank is located on the aircraft.
Left, right, and center.
These are the primary flight controls.
This section of the turbofan engine produces the majority of the thrust on the 737-300.
N1.
This system automatically sends OUT, OFF, ON, and IN times to the company.
This system lets the landing gear drop even if hydraulic power is lost.
Manual gear extension system.
These 2 AC-powered devices live in each tank and keep fuel moving to the engines.
AC-powered fuel boost pumps.
These are the names of the three independent hydraulic systems on the 737-300.
Hydraulic systems A, B, and standby.
This is the high-pressure rotating assembly in the 737-300.
This cockpit unit is the pilot’s primary interface for entering flight plans into the FMS.
This annunciator warns the crew when a system parameter is out of limits and requires pilot attention.
MASTER CAUTION light.
This pump in the center tank works to reduce unusable fuel by sending leftovers to the main tanks.
Center tank scavenge pump.
This is how many hydraulic pumps the aircraft has.
Five hydraulic pumps.
This system provides compressed air for engine starting, air-conditioning, and pressurization.
Bleed air.
This system computes aircraft position using accelerometers and gyros, even with no external signals.
IRS.
This cockpit control instantly kills electrical power to the engines’ igniters and fuel flow.
Engine start lever to CUTOFF.
This valve, when opened, allows fuel from either side of the aircraft to supply both engines.
Fuel crossfeed valve.
Deployed in flight, these devices help you descend without touching the brakes.
Speed breaks / Spoilers.
During engine start, this valve opens to admit pneumatic air into the starter.
Start valve.
This stored dataset inside the FMS determines available procedures like SIDs, STARs, and approaches.
Navigation database.
This device records cockpit audio for accident investigation but overwrites itself continuously.
CVR.
Two low-pressure lights illuminate for the same tank. The FUEL and MASTER CAUTION lights come on. The QRH says to do this first.
Turn the fuel pumps off.
This hydraulic system provides backup power to the rudder if System A or B pressure is lost.
Standby hydraulic system.
This cockpit indication rising above normal during takeoff power suggests an engine is not producing adequate thrust.
High EGT.
This ACARS function allows dispatch to uplink an amended release or reroute to the aircraft in flight.
Flight plan uplink.
This system deploys automatically on landing to dump lift and improve braking effectiveness.
Speedbrakes in auto-deploy mode.