IO-390-D Series Engine Maintenance Manual
© 2020 Avco Corporation. All Rights Reserved
05-20
March 2020
Page 31
IO-390-D Series Engine Maintenance Manual
9.
1000-Hour Engine Inspection for IO-390-D Series Engines
The purpose of this inspection is to examine the exhaust valves and guides on the engine cylinders.
A.
Complete the 1000-Hour Engine Inspection after every 1000 hours of operation since the
engine has been in service.
NOTICE:
If valve sticking is a problem, this inspection must be done. Refer to the section
“Corrective Action for Valve Sticking” in Chapter 72-30.
If this 1000-hour inspection is completed prior to the scheduled 1000-hour
inspection it must be completed 1000 hours from the time of inspection.
B.
Copy and complete the 1000-Hour Engine Inspection Checklist for IO-390-D Series Engines
as a record of engine service. Record the engine hours.
WARNING
BEFORE ANY ENGINE INSPECTION OR SERVICE PROCEDURE,
MAKE SURE THE IGNITION SWITCH IS SET TO OFF AND THAT ALL
POWER TO THE ENGINE IS DISCONNECTED. ENSURE ALL
OBJECTS/PERSONNEL ARE CLEAR OF THE PROPELLER’S
ROTATIONAL ARC. IF POWER IS ON, A LOOSE OR BROKEN WIRE
CAN CAUSE THE ENGINE TO START AND THE PROPELLER TO
TURN WHICH CAN LEAD TO DEATH OR SERIOUS INJURY OR A
PROPELLER STRIKE.
1000-Hour Engine Inspection Checklist for IO-390-D Series Engines
Engine Model Number___________________
Engine Serial Number:___________________
Engine Time:___________________________
Date Inspection Done:____________________
Inspection done by:______________________________
Inspection Item
Comments
Results/Notes
Done
Complete the 500-Hour Engine
Inspection Checklist.
Refer to the section “500-
Hour Engine Inspection for
IO-390-D Series Engines”
in this chapter.
Complete the “Exhaust Valve and Guide Inspection” procedure in Chapter 72-30. Record the results
for each cylinder below.
Exhaust Valve and Guide Inspection
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
