Vedeneyev M-14P, Maintenance Manual

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TO M-14P M.S. TASK CARD No. 203
M.S. ITEM procedure: Engine Shutdown
OPERATIONS AND TECHNICAL REQUIREMENTS CORRECTIVE ACTIONS CHECKED
BY
1. Prior to shutdown, cool the engine as follows: (1) Fully open the cowling and oil cooler
shutters.
(2) Decrease engine speed to 28 to 34 % (800 to 1000 r/min) (the airscrew is in the LOW
PITCH and run the engine at this rating till cylinder head temperature drops to 140 to 150 °C.
CAUTION: 1. IT IS ALLOWED TO SHUT DOWN THE ENGINE AT A CYLINDER HEAD
TEMPERATURE OF UP TO 170 °C AS READ BY THE INDICATOR IN THE PILOT'S CABIN IF
THEY CANNOT BE COOLED DOWN TO 140 TO 150 °C. THE NUMBER OP SHUTDOWNS AT
ELEVATED CYLINDER HEAD TEMPERATURES SHOULD BE INDICATED IN THE ENGINE
LOG BOOK.
2. IT IS PROHIBITED TO RUN THE ENGINE IDLE FOR A LONG TIME BEFORE
SHUTDOWN, OTHERWISE SPARK PLUG FOULING, OVERFILLING OF CRANKCASE WITH
OIL MAY RESULT, WHICH IN TURN MAY LEAD TO HYDRAULIC SHOCK AT SUBSEQUENT
STARTING.
2. After cooling down the cylinder heads, increase engine rotational speed to 65 to 68 %
(1900 to 2000 r/min) by the carburetor throttle control lever.
3. Fire the spark plugs at a speed of 65 to 68 % (1900 to 2000 r/min) during 20 to 30 s.
4. Decrease the rotational speed to 28 to 34 % (800 to 1000 r/min), turn off the ignition
and smoothly open fully the carburetor throttle.