Fuel Line Replacement - Lycoming IO-390-D Series Maintenance Manual

IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
Inspection Item
Examine the cushion on clamps for
deterioration. If cushions are
deteriorated or missing, replace the
fuel line and the clamp with a new
clamp with the cushion intact.
Examine solder joints at the end of
each fuel line for cracks. Replace the
fuel line if a crack is found at a solder
joint.
Operate the engine and look for fuel
leaks. Identify and correct the cause of
any fuel leak or malfunction. Operate
the engine again to make sure it is
operating correctly and there is no
leak anywhere.
Tighten any loose fasteners, fittings,
or connections.*
* Per the Standard Torque Tables in the latest revision of the Service Table of Limits - SSP-1776.
NOTICE: Review any applicable warranty information relative to replacement of a fuel
component as per the latest revision of Service Letters L221 and L253.

4. Fuel Line Replacement

WARNING
DO NOT SMOKE OR HAVE AN OPEN FIRE/FLAME OR USE ANY
DEVICES THAT CAN MAKE SPARKS DURING THIS REPLACEMENT
PROCEDURE. FLAMES OR SPARKS CAN CAUSE FUEL IGNITION
WHICH CAN CAUSE BURNS, SERIOUS INJURY, OR DEATH.
© 2020 Avco Corporation. All Rights Reserved
March 2020
Fuel System Inspection Checklist (Cont.)
Fuel Line or
Injection Nozzle
1
2
3
4
1
2
3
4
N/A
N/A
Corrective Action
Findings
Taken
73-10
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