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Section 3051 ENGINE FAILURES D. UNFEATHERING PROCEDURE 1. During flight tests when the outside air temperature is below 40° F., the propeller should not be allowed to remain in the feathered position for a period in excess of one-half hour if it is to be unfeathered and the engine used in the air prior to landing. 2. Before unfeathering the engine the First Officer shall set tank selector valve for feathered engine to a tank containing fuel. Gr-1820G-102 R-1830-92 3. No firewall shut-offs Open firewall shut-off valve to feathered engine. 4. Peace mixture control Turn ignition switch for for feathered engine in feathered engine to "Both" "Full Rich" position. 5. When the Captain gives the order to unfeather, the First Officer shall: Rotate the "yellow Depress the "Red unfeathering Valve", for feathering Button" for the the engine to be engine to be unfeathered, unfeathered approximately holding it in against two turns open. spring tension. 6. The Captain will watch the tachometer and propeller. When rotation has positively started on G-102 engines, he will turn on the ignition to that engine. Allowing the engine to start rotation before turning the ignition on will prevent possible backfire in G-102 engine which might cause a fire in the carburetor. 7. As the engine speed increases the Captain will place the propeller control at approximately cruising position and be ready to advance the throttle slightly for warming up of the engine after it has started. 8. As soon as the engine RPM As soon as the engine RPM has reached 500, the has reached 800, the First Captain will order the Officer shall release the First Officer to close the feathering button, and unfeathering valve. It is place the mixture control important that the valve be in "Auto Rich". If the closed as soon as possible feathering button should to prevent excess loss of stick, it will be hydraulic fluid and necessary to pull the dilution of engine oil. button out manually to discontinue the feathering pump operation. 9. If the engine has been stopped a sufficient length of time for the head temperature to drop below 200° F. (94°C.) or the oil temperature to drop below 100° F. (38°C) the engine should be operated at about 20'' boost and 1200-1400 RPM until the head temperature is above 200° F and oil temperature is up to 100° F. 2/1/47 DC-3 EMERGENCY PROCEDURES