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REGULATIONS 

Section 3051                               ENGINE FAILURES 

C. FEATHERING PROCEDURES (CONT'D.)

4. As soon as the engine to be feathered has stopped rotating, the First Officer shall:

Close the "Red Feathering Valve". If the feathering relief fvalve should stick, hydraulic fluid will continue to be supplied to the propeller and it will unfeather.

Be prepared to pull the feathering button out manually. If it fails to pop out automatically, the feathering pump will continue to operate, and the propeller will unfeather. 

5. Close throttle on dead engine just enough to keep from operating warning horn. 

6. Close oil cooler shutters and cowl flaps on applicable engines to maintain head and oil temperatures as high as possible during period that engines are inoperative. This is especially important when operating at low temperatures.

7. Turn off fuel valve to appropriate engine. 

8. See that hydraulic pump and vacuum selector valves are set to live engine pumps. 

9. Operate firewall shut-off valve for feathered engine. 

10. If propeller or carburetor anti-icing is necessary, sot control valves accordingly to prevent feedingalcohol to dead engine. As it is not possible to isolate alcohol flow to either engine on DC-3D airplanes, pilot should use carburetor and propeller alcoho cautiously when flying single engine under icing conditions. 

11. Propellers on G-102 engines feather from the hydraulic system pressure and each time a propeller is feathered or unfeathered, approximately 3/4 of a gallon of Sperry oil passes into engine oil. There is a supply of oil in the hydraulic system sufficient to operate one propeller through two feathering and unfeathering cycles. In any event there will remain a supply of hydraulic fluid adequate for hand pump operation of flaps, landing gear and brakes. In the event that an engine propeller is feathered,  it will be necessary to unfeather the propeller and change the oil in that engine when it reaches the next scheduled stop. On the ground the propeller will unfeather without rotating when the correct unfeathering valve is opened, even though the engine is dead. If the dead engine cannot be operated further, drainage will, of course, be accomplished when engines are changed. It is essential that any feathering or unfeathering done in the air be reported to maintenance immediately upon landing so that steps may be taken to change the oil. 

As propellers on 1830-92 engines feather using oil fro the engine oil supply and a external pump to develop required pressure, no hydraulic considerations are necessary. It is also unnecessary to report to maintenance any feathering and unfeathering accomplished solely for training.

2/1/47                              DC-3 EMERGENCY PROCEDURE