WIXLIB

Engine FCU Manual Override Red lever located on aft cockpitskin on pilot’s left hand side Used to modulate engine powerif Fuel Control Pneumatic Systemmalfunctions Intended for Emergency use onlyand MUST BE OFF for normaloperations In case of emergency the Powerlever must be in maximum forwardthrust position to enable manualmodulating of power via FCUmanual override lever1-14FCU overrideleverAir Tractor 402/502/504/602 Pilot Training CourseCAUTIONThe fuel control manualoverride does not duplicatethe normal fuel controlfunctions and is not to beused as an optional meansof controlling the engine. Itis intended for emergencyuse only. Using the manualoverride lever results inoverriding of all automaticcontrol features associatedwith the normal usage ofthe power control lever.28

EngineStart switchIgnitor RSTART1-15Battery switch(MASTER)Air Tractor 402/502/504/602 Pilot Training Course29

Propeller andGovernor Hartzell Constant Speed 3, 4, and 5 bladed propellers Aluminum 102”-115.2” diameter depending on engine Constant Speed with Reverse and Full Featheringcapability Woodward Over-speed Governor Engages 4% over primary governor in the event ofprimary failure Test function reduces rpm by 50 - 75( /- 60)1-16Air Tractor 402/502/504/602 Pilot Training Course30

Propeller andGovernorSpinnerback rweightsAir Tractor 402/502/504/602 Pilot Training CoursePropeller lowpitch stop31

Fuel System 2 wet wing tanks: 120 -290 gallons depending on model and options Optional additional wing tanks Both tanks feed into a common header tank Fuel valve: MAIN and OFF on left side of cockpit forward of throttle quadrant (cannot select individual tanks) 2 Fuel gauges (If equipped with MVP-50, all indications are on the one digital screen along with fuel flow) Note: Half a tank remaining is not half of the gauge 4 Gallons in each wing tank ungaugeable Strainers in each tank, main fuel filter located forward side of firewall Fuel Filter Warning light will illuminate in the event of a clogged firewall fuel filter (the is a bypass on this filter that willallow fuel to continue to the FCU, but if the FCU filter clogs, flameout can occur) Single electrical airframe mounted fuel pump and engine driven fuel pump both capable of delivering fuelto the fuel control pump at a minimum of 15 psi The engine driven pump operates continuously while the electrical boost pump is only used to pressurize the lines priorto starting and as a back-up to the engine driven boost pump. The Fuel Control Unit (FCU) has its own fuel pump as well that is capable of providing fuel to the engine withunrestricted operation up to 10,000 ft (402/502) and 12,500 ft (602) msl. Fueled via over wing fuel caps Optional single point refueling common on a lot of aircraft. Relocates fueling port to lower left aft side of fuselage.1-18Air Tractor 402/502/504/602 Pilot Training Course32

Fuel SystemLocated on lower left side offuselage.FIREWALLFuel FilterWarningLightNo longer used1-19Air Tractor 402/502/504/602 Pilot Training Course33

Fuel SystemFuel Selector ValveAirframemounted fuelboost pump(electrical)1-20Header tankAir Tractor 402/502/504/602 Pilot Training Course34

Electrical 24 volt 250 amp system 1-21Lucas 250-Amp 28-Volt starter generator (SG)Generator Control Unit (GCU) - mounted R/H side below cockpit floorLine Contractor Relay (LCR) – right side of firewallStart Relay – right side of firewallStart Switch – Lower instrument panelGenerator Switch – Lower instrument panelPilot’s Panel Voltmeter – Lower instrument panelLow Voltage Warning Light – Upper instrument panel15 amp GCU Circuit Breaker – Lower instrument panelAir Tractor 402/502/504/602 Pilot Training Course35

ElectricalPanel Layout will vary depending onmodel and owner preferenceFlightInstrumentsand HopperQuantityDisplayMVP 50EngineMonitoringSystemDispersal Monitoringsystem: displays hopperquantity and boompressureFuel Systemmonitoring andCaution/WarningLightsAC and Blower OperationUpper: Landing/Working LightsLower: Dispersal SystemUpper: FlightLights/Gyros/Flaps (CBs)Lower: Engine Operation1-22Air Tractor 402/502/504/602 Pilot Training Course36

ElectricalFlightInstrumentsand HopperQuantityDisplayMVP 50EngineMonitoringSystemDispersalMonitoring system:displays hopperquantity and boompressureFuel Systemmonitoring andCaution/WarningLights1-22AC andBlowerOperationAir Tractor 402/502/504/602 Pilot Training Course37

Electrical 2 Gill 24-volt batteries (63 amp-hrs) wired in parallel for high cranking power,mounted at the base of the firewall (502A -60AG/-65AG and 602 are 3 batterysystems) Ground start receptacle on lower left side of cowling Should be used if less than 24 volts in the batteries to prevent a hot startGround PowerReceptacleBattery Box drainvalve (Caution:Corrosive)24 Volt Gill Batteries1-23Air Tractor 402/502/504/602 Pilot Training Course38

Air Conditioning Gas-cycle system allows for outside ram air,re-circulated cockpit air, or a combination Ram-air lever: aft wall of cockpit, right sideIf runningrecirculating air;Fresh Air lever – OFF,Cockpit Air Door OPEN The air conditioner compressor is enginedriven from a splined drive pad on theaccessory gear box (AGB). A machined brassquill shaft (designed as a shear point in theevent of compressor failure) connects theAir Conditioningengine AGB to the compressor drive belt.The quill shaft will fail in torsion, preventing Drive Pulley andthe failure loads from being transmitted into Serpentine Beltthe engine AGB.If while running the air conditioning for an extended period of timeyou start to notice the air temperature increasing, turn of the A/Cbecause the evaporator coil has started to freeze up (often caused bythe cockpit recirc door either not open, or blocked). Allow it to warmup and thaw out, then continue normal operation.1-24Machined brass quillshaftAir Tractor 402/502/504/602 Pilot Training Course39

Air Conditioning Air Conditioning master switch (BLOWER ONLY/OFF/AIR COND.):allows for blower forced air circulation without air conditioning Blower Switch (HIGH/MED/LOW): blower is ON anytime the A/CSwitch is not OFFA/C SwitchUP – Blower Fan only (ambient air)CENTER – OFFDOWN – Air Condition (Cool air being supplied fromcompressor on engine accessory case)Fan Operation:Basic Low, Medium, and Hi speeds1-25Air Tractor 402/502/504/602 Pilot Training Course40

Heating Bleed air off compressor section of the turbine routed to an ON-OFFvalve on the left-hand side of the fuselage just forward of the cockpit. Actuated by pulling a cable on the left side of the pilot’s seat.Be advised, the bleed air can get very hot in this aircraft if left unattended. It has been known to melt plastic parts when operated at full power.Bleed Air off of compressorBleed Air muffler under leftside of cockpit floorboards.Diffusor in cockpit floor.Vernier type control knob1-26Air Tractor 402/502/504/602 Pilot Training Course41

Flight Controls Ailerons and Elevator: push-pull tubes through bell cranks to thecontrol surface Rudder: stainless steel cables Flaps: Fowler type electrically driven by jack screw to a torque tube Can be stopped anywhere between 0 and 30 degrees of travelControlled by toggle switch mounted just aft of throttle quadrant10 deg increment markings on left wing appear as flaps are extendedOn 402, 502, and 602 series, the ailerons droop with the flapsThe flap motor goes through a lot of heavy operation on Air Tractors. So be aware of when your flaps reach a fully retracted position anddon’t try to continue to operate them beyond that. A limit switch is installed to stop them at full up, but if this fails or is set slightlywrong can could be applying a high amount of increased stress on the flap torque tubes.1-27Air Tractor 402/502/504/602 Pilot Training Course42

Flight ControlsFowler style Flaps withincrement marking on leftflap. (small fiberglass fairingcontains a light for nightillumination)Large spanailerons withcontrol assistservo tabsprovide goodroll control.1-28Air Tractor 402/502/504/602 Pilot Training CourseConventionalrudder andelevator controls43

Flight ControlsTrimPitch TrimRoll TrimYaw TrimAT-402A/BCockpit controlledleverGround adjustable –bendable tabsGround adjustable –hinged tab andpushrodAT-502B & 504Cockpit controlledleverGround adjustable –bendable tabsGround adjustable –hinged tab andpushrodAT-502A, 502XPCockpit controlledleverGround adjustable –bendable tabsCockpit controlled wheelAT-602Cockpit controlledleverCockpit controlled,electric servo tab(L/H) and bendabletab (R/H)Cockpit controlled wheel1-29Air Tractor 402/502/504/602 Pilot Training Course44

Rinse and SmokeDispersal Systems Rinse System: 18 gallon tank mounted forward ofthe firewall on the top side of the engine mount.Used to rinse chemical out of the hopper afteruse. Controlled by spring loaded switch on lowerleft instrument panel. Smoke System: 2 gallon tank with electric pumpmotor on the box Smoke oil tank located just aft of cockpit on left side. Fillport is on the left side of fuselage just aft of the door at thebase of the cockpit canopy. Total quantity is approximately 2 gallons and is pumped intothe right exhaust stack Activation is via a press and hold button on the controlstick.1-33Air Tractor 402/502/504/602 Pilot Training Course45

Dispersal Systems400 – 600 Gallon single piecefiberglass hopper depending onmodelAgriculturalHopper quantitygaugeAir tight lid with overcenter latches1-34Air Tractor 402/502/504/602 Pilot Training Course46

AgriculturalDispersal Systems Components 2.5 in. stainless or aluminum plumbing and streamlined extruded stainless oraluminum booms 48 nozzles (drilled and tapped for an additional 48 if desired) Spray Pump; Agrinuatics 3 in. capacity Fan: Lane Electric Brake (Weath-Aero, a less common option) Control Valve Strainer Gate Box Hopper Vent Flow Meter1-35Air Tractor 402/502/504/602 Pilot Training Course47

Dispersal SystemsAgriculturalHopper Vent(Open end points aft for wetchemical, forward for dry)Dual filler ports (optional,common setup is just one)Spray PumpHopper Gate BoxSpray Nozzle1-36Air Tractor 402/502/504/602 Pilot Training Course48

Dispersal SystemsAgriculturalLane Elect Pump Brake andFanControl Valve andspray handle(“money handle”)for normal sprayoperationEmergencyDump Gate1-37Air Tractor 402/502/504/602 Pilot Training Course49

Dispersal SystemsAgricultural Switching from liquid to dry material Remove only the pump and booms For extended fertilizer use, the center boom assembly and control valve should beremoved to prevent fertilizer from getting into the valve assembly Can be accomplished in a few minutes by removing stainless T-pins that support the centerboom assembly and removing the bolts that attach the valve to the stainless bracket The hopper vent tube is welded 3” stainless steel tubing inside the hopper. The vent tube protruding from the side of the adapter box is aluminum and pointsbackwards when liquid material is being used, the slight negative pressure preventsfumes from escaping around the lid. It must be rotated forward to provide positivepressure inside the hopper when dry material is used. This allows for a smaller gateopening for a given poundage which reduces the blockage effects of the door openinginto the slipstream. Various optional spreaders and gateboxes are available1-38Air Tractor 402/502/504/602 Pilot Training Course50

LightingAircraft Systems Exterior Lights Dual taxi/nose lights on engine cowling, Nav andAnti Collision lights on wingtips Retractable forward facing landing lights Work Lights Detachable turn lights (must beattached/detached prior to flight)Upper: Landing/ Working LightsLower: Dispersal System(May also be attached to a small toggle switch on the controlstick)1-39Air Tractor 402/502/504/602 Pilot Training Course51

Aircraft Systems Airframe construction Engine Propeller Fuel System Electrical Heating and Air Conditioning Flight Controls Dispersal Systems LightingAir Tractor 402/502/504/602 Pilot Training Course52

Section 2NORMAL OPERATIONS Preflight Inspection Before Engine Starting Engine Start (Battery) Before Taxi Before Takeoff (Runup) Takeoff Climb2-1 CruiseDescentBefore LandingApproachBalked LandingShutdown and SecuringAir Tractor 402/502/504/602 Pilot Training Course53

NORMAL OPERATIONSPreflight InspectionCockpit Check1)2)3)4)5)6)7)8)2-2Control Lock - STOWParking Brake – OFF (Take terrain into account)Battery – ONVoltmeter – 24 Volts min for battery startFuel Quantity Gauges – CheckFlaps – EXTENDBattery – OFFPower, Prop, Start Levers - AFTAir Tractor 402/502/504/602 Pilot Training Course54

NORMAL OPERATIONSPreflight InspectionExterior Check1) Baggage Door – CLOSED and FASTENED2) Booms, Spray Nozzles, and Fittings – CHECK for leaksand secure3) Flaps – CHECK secure4) Aileron – CHECK secure, no slop, servo arm movesopposite of aileron, and trim tab secure5) Wing Tip – NO Damage, NAV/Anti Collision lights secure,turning light fully stowed6) Fuel Vent Tube – Clear no obstructions7) Pitot Tube – Lift cover and check clear8) L/H Fuel Cap – Visually check secure9) Left Wing Fuel Sump – Drain and check for debris/water10) Header Tank Sump – Drain and check for debris/water2-3Air Tractor 402/502/504/602 Pilot Training Course55

NORMAL OPERATIONSPreflight InspectionExterior Check (Drain locations 402)2-3Air Tractor 402/502/504/602 Pilot Training Course56

NORMAL OPERATIONSPreflight InspectionExterior Check (Drain locations 502)2-3Air Tractor 402/502/504/602 Pilot Training Course57

NORMAL OPERATIONSPreflight InspectionExterior Check (Drain locations 602)2-3Air Tractor 402/502/504/602 Pilot Training Course58

NORMAL OPERATIONSPreflight InspectionExterior Check11) Spray Plumbing – Check for leaks and loose connections12) Left Hand Gear Leg - Inspect for cracks, damage, stressmarks- Optional Wire cutters may be installed on leading edge of gearleg check secure13) Left Wheel and Brake assembly – Check no chords showingon tire, inflated to 62 PSI, brake pads are free to moveslightly14) Oil Service Door on top Cowl – Check oil level not morethan 2 quarts below “Full” mark. Cap secure.15) Prop – Remove tether and rotate briskly while listening forunusual rubbing or metallic noise2-4Air Tractor 402/502/504/602 Pilot Training Course59

NORMAL OPERATIONSPreflight InspectionExterior Check16)17)18)19)Cowling – Check for any unfastened CamlocsAir Intake – Check for foreign objectsExhaust Stacks – Remove coversRight Hand Gear Leg - Inspect for cracks, damage, stressmarks- Optional Wire cutters may be installed on leading edge ofgear leg – check secure20) Right Wheel and Brake assembly – Check no chordsshowing on tire, inflated to 62 PSI, brake pads are free tomove slightly21) Right Wing Fuel Sump – Drain and check for debri/water22) R/H Fuel Cap – Visually check secure23) Fuel Vent Tube – Clear no obstructions24) Wing Tip – NO Damage, NAV/Anti Collision lights secure,turning light fully stowed2-5Air Tractor 402/502/504/602 Pilot Training Course60

NORMAL OPERATIONSPreflight InspectionExterior Check25) Aileron – CHECK secure, no slop, servo arm moves oppositeof aileron.26) Flaps – CHECK secure27) Booms, Spray Nozzles, and Fittings – CHECK for leaks andsecure28) Right Hand Side of Fuselage – Check skins for unfastenedCamlocs29) Static Port – Clear of obstructions30) Right Hand Stabilizer and Strut – Check secure, should be noplay in any direction31) Right Hand Elevator – Check hinge bolts, move up anddown, check for security32) Trim Tabs – Check for security, inspect linkage2-6Air Tractor 402/502/504/602 Pilot Training Course61

NORMAL OPERATIONSPreflight InspectionExterior Check33) Rudder – Start from top down, inspect hinge bolts, movefrom stop to stop to check security, inspect rudder cablesand connections34) Tail Wheel Assembly – Check attach points to fuselage1)2)3)4)Inspect Tailwheel ForkCheck for broken centering springsCheck tailwheel lock by lifting plunger by handTire inflation to 60 PSI35) Left Hand Elevator – Check hinge bolts, move up and down,check for security36) Left Hand Stabilizer and Strut – Check secure, should be noplay in any direction37) Static Port – Clear of obstructions38) Left Hand Side of Fuselage – Check skins for unfastenedCamlocs2-7Air Tractor 402/502/504/602 Pilot Training Course62

NORMAL OPERATIONSPreflight InspectionExterior Check39) Tie down Ropes – All removed and wheel chocks out40) Hopper Lid – Closed, latches secure41) Front Wind Screen – Clear and wiper secure2-8Air Tractor 402/502/504/602 Pilot Training Course63

NORMAL OPERATIONSBefore Engine StartingBefore Start1)2)3)4)5)6)7)8)9)10)11)12)13)2-9Fire Extinguisher – SecureCockpit – No loose itemsSeat Belts and Harness – FASTEN and SecureBrakes – Test and set parking brake ON (Depress pedals and pull lever)Trim – Elevator and Rudder set to Green ArcAltimeter – SETRudder Pedals – SET (Make sure able to achieve full deflection)Flight Controls – CHECK FREE and CLEARCircuit Breakers – Check all INBattery Switch – ONFuel Selector Valve – ONFuel Boost Pump - ON (Until 5 psi min. fuel pressure noted) OFFFlaps – RETRACT (can be delayed till after start to avoid battery drain)Air Tractor 402/502/504/602 Pilot Training Course64

NORMAL OPERATIONSBefore Engine StartingBefore Start14)15)16)17)2-10Fuel Flow Meter – SETWarning / Caution Lights – Push to TESTVoltmeter – CHECK 24 volts min.FCU Over-ride – Check Secure (if installed)Air Tractor 402/502/504/602 Pilot Training Course65

NORMAL OPERATIONSEngine Start (Battery)Starting1)2)3)4)5)6)7)8)9)10)Power lever – IDLE STOPProp Lever – FULL AFT to Feather Stop (F)Start Control Lever (Condition) – FULL AFT to Fuel Cut-OffBattery Switch – ONIgnition Switch – OFF (Center Positon)Generator Switch – OFFProp Overspeed Switch – OFFProp Area – CLEARSta

on top of lower instrument panel) 5606A hydraulic fluid Parking brake applied by holding brake pressure, pulling parking brake lever, and releasing pedal pressure. Released by applying pedal pressure. 14 Tailwheel locking pin Airframe Construction 1-4 Air Tractor 402/502/504/602 Pilot Training Course Main Tire T/W AT-402A/B 29x11-10 (10 Ply) 5.00x5 (6 Ply) AT-502B/504/502A 29x11-10 (10 Ply .