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[[logo]]COLONIAL[[/logo]] REGULATIONS [[logo]]COLONIAL[[/logo]]
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Section 3034               GROUND TESTING ENGINES
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A. WARM-UP

1. A thorough warm-up is recommended. During warm-up the carburetor heat controls should remain in the same position as for starting. Manually controlled oil cooler shutters (G-102 Engine only) should remain in the CLOSED (FULL HOT) position until the oil reaches a satisfactory operating temperature. Open shutters as required.

GR-1820 G-102                     

2. Propellers should be in low pitch position for all checks and ground running. Check following at 1000-1200 RPM, allowing oil temp. to make at least a 10°F. rise before increasing engine RPM.

R-1830-92
Operate engines at 1000 RPM until oil temp. reaches at least 104°F and cylinder heads have reached at least 250°F. Caution: Do not attempt to warm engines with cowl flaps closed. Cowl flaps should be "full open" for all ground operation.

3. Place manifodl [[manifold]] pressure cross-over valve in the "bleed position".

4. Wind clock and obtain time check and altimeter setting (see Radio Ramp check Procedure Section 5001 of Operations Manual.)

5. Check both right and left ignition switches for each engine by turning the switch to the "left" and "right" segments to check for possible completely dead "left" and "right" magnetos, then turn switch to the "off" position momentarily to see that the switch is properly hooked up and that ground wires are properly connected so that the engine will stop when the switch is "off".

6. Check landing gear pressure on both landing gear pressure gauge and hydraulic system gauge. Both gauges should indicate approximately 750 lbs. on one hydraulic pump. Then lower pressure by operating flaps up and down. When pressure has been reduced to approximately 500 lbs. (cut in pressure of the regulator) pressure build up should occur. Place pump selector in alternate pump position during pressure buildup. Alternate pump should continue to build up pressure to 750 lbs.

7. Check operation of elevator, rudder and aileron flettner controls through their full range of travel, then return to neutral.

8. Turn wing and tail deicers to "ON" position and allow them to operate during warm up.

9. Turn on propeller deicers and with rheostat turned to full speed, check fluid being sprayed on propeller blade.

10. Turn on windshield deicer fluid valve. Check pump operation cautiously allowing fluid to bubble from discharge lines without spraying onto windshield. This prevents unnecessarily smearing the windshield.

                                                                    DC-3 GROUND OPERATION
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