PDU OPERATION

TM 5-3740-218-13&P Groundperson 2 and Helicopter Crew Chief: WARNING Ground personnel must be aware of their position in relation to helicopter at all times to prevent personal injury. Ground personnel involved in ground operation of PDU and/or helicopter shall wear protective head gear for ears and eyes to prevent personal injury. a. Using appropriate hand signals (figure 2-13), signal helicopter pilot that area is clear for takeoff. b. Direct pilot in vertical liftoff until PDU clears ground. 2-13. PDU OPERATION a Make sure SYSTEM switch is set to OFF. b. Set POWER switch to ON. Check that POWER indicator lights. c. Start engine with ENGINE START switch. Check that ENGINE indicator lights. NOTE Note time that dispersal begins and ends since application rate can only be determined if dispersal time is known. d. When ready to disperse pesticide, set SYSTEM switch to ON. Check that EMPTY indicator is not lit. Note time. CAUTION Shut down hydraulic system immediately when EMPTY indicator lights, or damage to pump could occur. e. When EMPTY indicator lights, set SYSTEM switch to OFF, ENGINE switch to OFF, and POWER switch to OFF. Note time. 2-45