IO-390-D Series Engine Maintenance Manual
© 2020 Avco Corporation. All Rights Reserved
05-00
March 2020
Page 3
IO-390-D Series Engine Maintenance Manual
5.
Safety Precautions - Before Engine Maintenance
WARNING
BEFORE THE START OF ANY SERVICE OR MAINTENANCE ON AN
INSTALLED ENGINE OR AN ENGINE ON A TEST STAND CONNECTED
TO POWER, ENSURE THE IGNITION SWITCH IS TURNED OFF AND
DISABLE/DISCONNECT ALL POWER TO THE ENGINE TO PREVENT
ACCIDENTAL ENGINE START-UP. FAILURE TO DISABLE POWER
COULD CAUSE ACCIDENTAL ENGINE START-UP, INJURY, OR DEATH.
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.
IF IT IS NECESSARY TO COMPLETE OPERATIONAL TESTS ON THE
ENGINE WITH POWER ON, KEEP ALL PERSONNEL AWAY FROM THE
ROTATIONAL RADIUS OF THE PROPELLER TO PREVENT INJURY OR
DEATH ON ENGINE START-UP.
A.
Disconnect the battery.
B.
Remove access panel(s), cowling(s) and/or baffles for access to areas.
6.
Maintenance Practices
A.
Obey all safety precautions.
B.
Do not reuse a gasket, O-ring, or seal. Install a new gasket, O-ring, or seal during component
installation where a gasket, O-ring, or seal was removed.
C.
If maintenance is done that could cause contamination of the internal components of the
engine, complete the “Oil Change Procedure” in Chapter 12-10.
D.
Remove all traces of dirt, dust, debris and accumulated matter from parts. All parts must be
clean before they are installed on the engine. For specific cleaning guidelines, refer to
Chapter 05-30.
E.
If adhesive tape has been applied to any part, remove the tape and all residue. Clean the part
completely.
F.
Hardware
(1)
All cotter pins that are removed must be discarded and not reused. Install a new cotter pin
where a cotter pin was removed.
(2)
All safety wire and cotter pins must be made of corrosion-resistant steel and installed as a
snug fit in holes in studs and bolts for correct locking.
(3)
If safety wire or safety cable was removed during component removal, be sure to install
new safety wire or safety cable during component installation.
(4)
All safety cable installed on the engine must meet or exceed specifications in the latest
revision of AS3510. Safety cable must be installed per the safety cable manufacturer’s
instructions and in accordance with specifications in the latest revisions of AS4536 and
AS567 and the latest revision of Service Instruction No. SI-1566.
