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YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
(21) Use a crane or overhead hoist (with a minimum load of 750 lb (340 kg)) to increase the
tension in the lifting cable until there is enough tension to hold the weight of the engine.
(22) Remove the nuts and bolts from the engine mounts that are supplied by the airframe
manufacturer.
NOTICE: Do not remove the engine-mounting brackets. They are crating and packing tie-
down points for shipping. Also, an overhaul facility will use the brackets to
mount the engine in an overhaul stand.
(23) Lift the engine from the airframe.
(24) Carefully lift the engine slowly out of the airframe.
(25) Put the engine on an engine stand, transport dolly, or engine shipping container base.
(26) Install protective covers over any open lines.
(27) To prevent delays on engine re-installation, have materials and new spare parts on hand.
Refer to the YO-233-B2A Series Engine Illustrated Parts Catalog.
3. Engine Installation Preparation Requirements
To prevent delays on engine re-installation, have the following materials and new spare parts
available (YO-233-B2A Series Engine Illustrated Parts Catalog) to replace any of these parts:
A. Gaskets, seals, and packing - make sure the new parts are not brittle, torn, cut, or cracked and
do not have flashings, deterioration/wear or deformities.
B. Before installing a part, complete a check of the shelf-life of a part as per the latest revision
of Service Letter No. L247.
C. Any parts that were found damaged and cannot be repaired.
D. Lockwire.
E. Lock washers, lock nuts, tab locks, tab washers, and cotter pins.
F. Oil per specifications in Appendix A of the YO-233-B2A Engine Installation and Operation
Manual.
G. Fuel per specifications in Appendix A of the YO-233-B2A Engine Installation and
Operation Manual.
H. Cleaning materials.
© 2021 Avco Corporation. All Rights Reserved
February 2021
MAKE SURE THE AREA IS CLEAR WHEN LIFTING THE ENGINE.
DO NOT ALLOW THE FRONT, REAR, SIDES OR BOTTOM OF THE
ENGINE TO BUMP OR STRIKE ANY OBJECTS TO PREVENT
DAMAGE TO THE ENGINE OR ITS COMPONENTS.
DO NOT PUT TAPE OR INSERT PLUGS INSIDE OPEN LINES OR
FITTINGS.
LOCKWIRE (SAFETY WIRE), LOCK WASHERS, LOCK NUTS, TAB
LOCKS, TAB WASHERS, AND COTTER PINS ARE TO BE
DISCARDED, NEVER TO BE RE-USED OR RE-INSTALLED ON AN
ENGINE. DURING ENGINE INSTALLATION, ALWAYS USE NEW
LOCKWIRE, LOCK WASHERS, LOCK NUTS, TAB LOCKS, TAB
WASHERS, AND COTTER PINS.
72-00
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