IO-390-D Series Engine Maintenance Manual
© 2020 Avco Corporation. All Rights Reserved
05-20
March 2020
Page 25
IO-390-D Series Engine Maintenance Manual
100-Hour or Annual Engine Inspection Checklist for IO-390-D Series Engines (Cont.)
Inspection Item
Comments
Results/Notes
Done
Fuel System
Complete the Fuel System
Inspection.
Refer to the section "Fuel
System Inspection” procedure in
Chapter 73-10.
CAUTION
DO NOT ATTEMPT TO REPAIR A DAMAGED FUEL LINE. REPLACE
ANY FUEL LINE THAT IS CRACKED, DENTED, OR KINKED; CRACKS
CAN DEVELOP AT THE SIDE OF SHARP BENDS OR KINKS.
Examine fuel lines for correct
routing, damage, leaks, dents,
pits, nicks, kinks, stains caused
by fuel leaks, cracks, brittleness,
or chafing.
Refer to the "Fuel Line
Inspection” section in Chapter
73-10.
Fuel Line 1
Fuel Line 2
Fuel Line 3
Fuel Line 4
Make sure fuel lines are held
securely in place using clamps
with cushions.
If no clamps are attached to the
fuel line that was in service,
replace the fuel line per
instructions in Chapter 73-10.
If cushions on clamps are
deteriorated or missing, replace
the clamps.
If the clamps are loose, replace
the fuel line.
NOTICE:
Plastic tie straps are
not an acceptable substitute for
clamps.
Examine the fuel injectors for
leaks and correct installation.
Refer to the section “Fuel
Injector Leak Check” in Chapter
73-10.
Examine the fuel injector nozzle
line attachments for secure
connection.
Tighten any loose connections
per torque values in the latest
revision of the
Service Table of
Limits - SSP-1776
Examine each fuel line between
the fuel manifold and the nozzles
for any evidence of physical
damage and for stains caused by
fuel leakage.
Replace damaged or worn fuel
lines.*
