Technical data

13773-001
28-00
Page 1
FUEL
1. GENERAL
This chapter contains information on storage, distribution, and indicating components of the fuel sys-
tem. The engine is supplied with fuel drawn out of the left or right integral fuel tank (depending on the
fuel selector valve position). Fuel flows through a flapper assembly (swing check valve), integral col-
lector tank, selector valve, electric auxiliary fuel pump, gascolator, engine-driven fuel pump, fuel-flow
transducer, throttle body, fuel injection manifold (spider), and is then distributed to the fuel nozzles. All
fittings installed in the cabin area of the fuselage are enclosed in a vented and drained enclosure.
Refer to Chapter 73 for information on servicing of the engine-driven fuel pump, fuel flow transducer
and fuel nozzles. (See Figure 28-001), (See Figure 28-002)
2. TROUBLESHOOTING
Trouble Probable Cause Remedy
Filler cap leaks Filler cap improperly installed Install filler cap properly
Seal improperly installed Replace fuel cap seal
Deteriorated seal Replace fuel cap seal
Improperly tightened cap fuel nuts Tighten or loosen fuel cap nuts as
required
Fuel connector(s) leak Loose connector(s) Inspect and tighten connector(s)
Defective seals Replace seals
Defective thread Replace threaded component
Insufficient fuel flow Restricted fuel filter/screen
Defective mechanical fuel pump
Defective fuel pressure sensor or
insufficient voltage supplied
Cracked fuel line
Clean filter or screen
Replace pump
Replace pressure sensor
Find voltage problem
Replace line
Fuel quantity indicator reading
incorrect
Defective fuel sensor
Defective fuel quantity indicator
Incorrectly adjusted fuel sensor
Faulty fuel system wiring
Replace sensor
Replace indicator
Adjust sensor
Repair/Replace wire(s)
No fuel flow to engine driven fuel
pump
Fuel selector valve not in the on
position
Fuel tanks empty
Fuel line disconnected or broken
Fuel tank screen plugged
Defective fuel selector valve
Plugged gascolator
Fuel line plugged
Frozen fuel line
Turn selector valve on
Fill tanks
Repair or replace line
Clean or replace screen
Replace selector valve
Clean or replace gascolator
Remove obstruction
Thaw and drain complete fuel sys-
tem
30 Nov 2000