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CHAPTER FOUR
FUEL SUPPLY SYSTEM
400. INTRODUCTION
This chapter discusses the T-1A fuel supply system. The information is designed to provide you
with an understanding of the Fuel Supply system construction and operation. The fuel supply
system provides an independent fuel supply for each of the aircraft's engines and is designed to
operate between sea level and 41,000 feet, within the temperature range between -40-50 degrees
C.
Fuel flows from the left engine feed tank to the left engine and from the right engine feed tank to
the right engine. Two transfer jet pumps (in each engine feed tank) transfer fuel from wing tanks
to the engine feed tanks.
During normal operation, the primary jet pump provides fuel feed to their respective engine. The
engine driven fuel pump supplies motive flow for the primary jet pump. The boost pump is used
during engine starting, fuel crossfeed, wing tank to feed tank fuel transfer, and as a backup for
the primary jet pump. The boost pump energizes automatically during engine starting. After
engine starting, the boost pump automatically stops.
401. ENABLING OBJECTIVE
Recall the basic description, related components, and function of the fuel supply system.
402. ENABLING STEPS
1.
List the components of the fuel supply system.
2.
State all operating limits of the fuel supply system.
3.
Discuss the fuel distribution.
4.
State the purpose of the fuel annunciator lights.
5.
State the function of the ENGINE FUEL SHUTOFF VALVE switchlights.
403. FUEL STORAGE SUBSYSTEM
The fuel storage subsystem consists of six primary fuel tanks, three surge/vent tanks, and
associated lines, valves, pumps, controls, indicators, and annunciators.
Fuel Tanks
The fuel tanks are located in three fuselage areas and on both wings. An aft cabin tank and aft
fuselage tank are located in tandem on either side of the aft pressure bulkhead. Two mid tanks
FUEL SUPPLY SYSTEM
4-1


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