IO-390-D Series Engine Maintenance Manual
05-20
© 2020 Avco Corporation. All Rights Reserved
Page 10
March 2020
IO-390-D Series Engine Maintenance Manual
Visual Inspection Checklist for IO-390-D Series Engines
Engine Model Number___________________
Engine Serial Number:___________________
Engine Time:___________________________
Date Inspection Done:____________________
Inspection done by:______________________________
Item
Comments
Findings/
Corrective Action
Done
Engine Compartment
Look for and remove unwanted dirt,
dust, sand, or particles on the engine
and in its compartment.
If the engine has been exposed to
volcanic ash, remove the volcanic
ash and particulate contamination.
Refer to the section
“Volcanic Ash
Removal” in Chapter 05-
30.
Examine all hoses, lines,
connections, wiring, fittings, and
baffles for loose connections and
any damage.
Tighten any loose
hardware as per the
Standard Torque Tables
in the latest revision of
the
Service Table of
Limits - SSP-1776.
Replace field serviceable
damaged components.
Otherwise, send the
engine to Lycoming
Engines for repair.
Examine the cowling and baffles for
damage and correct installation
Replace damaged
cowling or baffles in
accordance with aircraft
Original Equipment
Manufacturer (OEM)
procedures.
Examine the cowling, engine and its
compartment for evidence of fluid
leaks, residues, or discoloration.
Identify and correct the
cause of any leak,
residue or discoloration.
Examine the intercylinder baffles for
damage or looseness.
Replace a damaged or
loose intercylinder
baffle. Refer to the
“Intercylinder Baffle
Removal” procedure in
Chapter 72-30.
