Chapter Four Fuel Supply System

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

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

List the components of the fuel supply system.

State all operating limits of the fuel supply system.

Discuss the fuel distribution.

State the purpose of the fuel annunciator lights.

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

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