H-34 Choctaw/Normal Procedures

SECTION 6. NORMAL PROCEDURES

1 General

This section describes the procedures necessary to safely and efficiently operate your aircraft. A basic understanding of helicopter flight techniques is assumed.

3 Normal Start-Up

3.1 Prestart

1. Rotor Brake – ON
2. Anti-collision lights – AS REQUIRED
3. Cabin lights – AS REQUIRED
4. All Light Rheostats - AS REQUIRED
5. Cabin Heater Switch - OFF
6. Fan Switch - OFF
7. Pitot Heater Switch - OFF
8. Windshield Wiper Rotary Switch - OFF
9. Crew Alarm Bell - TEST
10. Hoist Master Switch - OFF
11. Radio Master Switch - RADIO MASTER
12. Circuit Breakers - IN
13. Stick Trim Switch – ON
14. Fuel Shutoff Valve - Open
15. Mixture Control Lever - IDLE CUT-OFF
16. Carburetor Air Lever - DIRECT
17. Clutch Pump Switch - OFF
18. Servo Switch – ON
19. Parking Brake Handle - RESET
20. Tail Wheel - LOCKED
21. Radios, Radar Altimeter, IFF - OFF
22. Ignition Switch - OFF
23. Fuel Booster Pump Switch - OFF
24. External Power - ON (voltage checked)
25. Battery-Generator Switch - BATT ONLY (voltage checked)
    Note: When starting without external power, the battery-generator switch must be in the BATT ONLY position to energize the starter relay and engine primer which are connected to the secondary bus.
26. Fuel Pressure – Check
    1. Fuel Shut-Off Switch - CLOSED
    2. Fuel Pressure Gage - ZERO PSI
    3. Fuel Shut-Off Switch - OPEN
    4. Fuel Pressure Gage - Check for Fuel Pressure Increase
    5. Fuel Booster Switch- FUEL BSTR PUMP
27. Clutch Pump Warning Light - TEST
28. Instr. Pwr. Failure Warning Lights - TEST
29. Fuel Low Level Warning Light - TEST
30. Rotor Brake Warning Light - TEST
31. Generator Warning Light - TEST
32. Collective - DOWN
33. Throttle – CLOSED

3.2 Starting Engine

1. Starter Button – DEPRESS
2. Ignition Switch – BOTH (after engine has cranked for approximately 5 sec.)
3. Primer Button – DEPRESS
   NOTE: If engine fails to start after 30 seconds, allow the starter to cool and then repeat starting procedure
4. Mixture Control Lever – RICH
5. Engine – Verify running smoothly
   NOTE: Do not allow the engine to exceed 1400 RPM on starting.
   CAUTION: To prevent possible engine damage, if oil pressure does not register within 10 sec. or reach 40psi within 20 sec., stop engine and investigate.
6. Starter and Primer – OFF
7. Idle Engine at 1000 +- 100 rpm until oil pressure has stabilized
8. Aux. Hyd. Press. - 1300 to 1600 psi