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REGULATIONS

Section 3039    GROUND CHECK PRIOR TO TAKE-OFF

A. PERFORMANCE CHECK

1. Just prior to take off, the airplane should be headed into the wind and a short run up of each engine made to check fuel and oil pressures, carburetor heat, magneto operation, and propeller governing action.

GR-1820G-102    R-1830-92

2. Set manifold pressure to 25 "Hg.    Set manifold pressure to 25 "Hg.

3. Check fuel pressure for 5-6 psi.    Check fuel pressure for 14-16 psi.

4. Check oil pressure for 60-65 psi.    Check oil pressure for 80-100 psi.

5. "Left" and "Right" magneto operation should be checked on each engine noting RPM drop and smoothness of operation on individual magnetos.

6. Operate propeller controls through their full range of travel noting smoothness of governing action, speed of pitch change and movement through full range of RPM travel.

7. Check gyro suction 4 in. ___1/2 in. & turn & bank 2 in.___2/10 in.

8. Move carburetor heat control to full "Hot" position.

Mixture air temperature should rise to at least 80°F.    Carburetor air temperature should rise to at least 90°F.

9. A check of the power developed by the engine can be made by opening throttles to 30" Hg. manifold pressure.

10. Approximately 1950 RPM should be obtained.    Approximately 2300 RPM should be obtained.

11. The RPM developed will vary with atmospheric conditions, giving higher values than stated when the air temperature is below 60°F. or when the field elevation at which the run-up is being made is above sea level. There will also be a noticeable increase in RPM if the run-up is made with the airplane headed into an appreciable wind.

B. POSITION OF CONTROLS

1. Oil temperature control "cold" (unless oil temp. is below 120° F.)    No control (except 86547)

1/15/46    DC-3 GROUND OPERATION