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YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
72-00 - RECIPROCATING ENGINE – REMOVAL/OPERATIONAL GROUND CHECK
1. Engine Removal Prerequisites
BEFORE ENGINE REMOVAL, BE SURE TO DISCONNECT ALL POWER
TO THE ENGINE. IF THE POWER IS NOT TURNED OFF, A LOOSE OR
BROKEN WIRE COULD CAUSE THE ENGINE TO START AND THE
PROPELLER TO ROTATE. AS A PRECAUTION, DO NOT STAND OR
ALLOW ANYONE ELSE TO STAND WITHIN THE ARC RADIUS OF THE
PROPELLER.
Before engine removal from the airframe:
A.
— Disconnect electrical power to the engine.
— Remove the propeller in accordance with the airframe manufacturer's instructions.
2. Engine Removal Procedure
A. Remove the engine as follows:
(1) Complete the prerequisites in the section "Engine Removal Prerequisites."
(2) If the engine is to be put back into service at a later date, complete the engine
preservation procedure before engine removal. Refer to instructions in the YO-233-B2A
Engine Installation and Operation Manual.
(3) Make sure that all electrical switches, circuit breakers, Ignition Switch, and the Fuel
Selector Valve are in the OFF position.
(4) In accordance with the airframe manufacturer's instructions, remove all cowling,
baffling and nacelle access panels that prevent engine removal.
(5) Apply a cap to lines and connections to prevent fuel spillage and debris from entering the
engine.
(6) Apply tags and identify ports, clips, tubes, wires, etc. for reference to make correct
connections during engine installation. Identify the location of each part during removal.
Tag unserviceable parts and units for investigation and possible repair.
(7) Disconnect any relays, gages, or other indicating devices following the airframe
manufacturer's procedure.
(8) During removal of tubes or engine parts, look for indications of scoring, burning or other
unacceptable conditions.
(9) Disconnect the ground terminal of the battery.
© 2021 Avco Corporation. All Rights Reserved
February 2021
USE CARE TO PREVENT DUST, DIRT, LOCKWIRE, NUTS,
WASHERS OR OTHER FOREIGN MATTER FROM ENTERING
THE ENGINE. DURING ENGINE REMOVAL, IF ITEMS
ACCIDENTALLY FALL INTO THE ENGINE, STOP UNTIL THE
DROPPED ARTICLES ARE FOUND AND REMOVED. USE
CORRECT PLUGS, CAPS, AND OTHER COVERING TO COVER
EXPOSED OPENINGS. DUST CAPS MUST BE INSTALLED
OVER, NOT IN, TUBE ENDS.
72-00
Page 87
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