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Nice Air Operation Procedure PA-34 Seneca

Copy Right Nice Air 2575 Robert Fowler Way, San Jose, CA 95148 Phone(408)729-3383

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down due to increasing drag on the blade. However, blade angle is decreased automatically to reduce 

the drag to maintain the RPM constant.

When the airplane drops it’s nose, it start to descend. As it descend, airspeed will increase. The RPM 

is also increased due to decreasing drag on the blade. However, blade angle is increased automatically 

to increase the drag to maintain the RPM constant.

Where is the governor located?

In front of the engine.

What does governor do?

The fly weight inside the governor senses the change in RPM by sensing the change in centrifugal 

force. It opens the pilot valve. When the RPM increase, the valve opens the line without the pump. It 

drains the oil back from propeller hub to increase the blade angle. When the RPM decrease, the valve 

opens the line with the pump. The pump send the oil to propeller hub to decrease the blade angle.

What makes it high pitch?

Nitrogen charged in the hub and counter weight at the root of the propeller blades.

What makes it low pitch?

High pressure of the oil and aerodynamic force on the prop.

What does pilot do when he move the prop lever in the cockpit? What will happen to governor?

It change the tension of the speeder spring. High tension requires more centrifugal force on the fly 

weight. It increase the RPM. Low tension requires less centrifugal force on the fly weight. It decrease 

the RPM.

Where is the oil from?

Engine oil reservoir at the bottom of the engine.

What will happen if you lose engine oil completely?

It become high pitch. Moves toward feathering.

How can you feather manually?

Move the propeller lever all the way down to the feather detent.

What is the purpose of feathering?

To reduce the drag caused by windmilling. To avoid further damage to the engine.

What force makes it feather?

Nitrogen charged in the hub and counter weight at the root of the propeller blades.

How can you unfeather the prop?

Use starter.

How does the unfeatering accumulator work?(if it is equipped)

It has diaphragm inside. Nitrogen is charged in one side. Engine oil is pumped in on the other side 

from the governor during normal operation. When the propeller lever is moved down to feather posi-

tion, the valve is closed to keep high oil pressure inside the accumulator(300PSI). When the prop lever 

is moved to high RPM position, the valve is opened and the nitrogen push the oil back. The oil is sent 

to the hub through the governor and crankshaft to decrease blade angle. Once the blade angle changes, 

the wind pick up the prop to start windmill. In this way, the engine can be restarted without stress on 

the cylinders(N43130 does not have unfeathering accumlator).

Will the prop feather when you shut down the engine after landing? Can you feather the prop when engine is not 

Summary of Contents for PA 34-200 Seneca

Page 1: ...irected through the alternate air source RPM drops slightly when it is open Cowl flap Manually operated There are three positions open half and closed Propeller Make Hartzell Model Type Constant speed...

Page 2: ...ion requires more centrifugal force on the fly weight It increase the RPM Low tension requires less centrifugal force on the fly weight It decrease the RPM Where is the oil from Engine oil reservoir a...

Page 3: ...ng Total four tanks What is the capacity of each tanks total usable Total 98 gallons 2 5 gallons unusable each side makes usable fuel of 93 gallons How many fuel gauges are there Three Fuel quantity g...

Page 4: ...e rial connection so either pressure reaches the set amount or all three up limit switches are pressed the pump will stop When all three down limit switches are pressed pump will stop and green lights...

Page 5: ...c pressure The gravity and the spring pulls gear down Electrical system What is the primary source of electricity Alternator How many alternators are there Two What drives the alternator Engine What i...

Page 6: ...you use 70 am continuously it last 1 2 hour Flight control system Conventional cable and pulley system The aileron and the elevator are interconnected Using rudder cause the aileron to be moved Flap T...

Page 7: ...Nice Air 2575 Robert Fowler Way San Jose CA 95148 Phone 408 729 3383 7 Hydraulic system Prop Brakes Landing gear Draw the airspeed indicator V speed MPH Va 145 Vx 90 Vy 105 Vxse 93 Vyse 105 Vsse Vmc 8...

Page 8: ...k 1 Seat belt Fasten 2 Fuel selector valve On 3 Mixture Rich 4 Fuel pump On 5 Master switch On 6 Primer Lock Clearing turn Complete 90 degrees turn to the left and 90 degrees turn to the right Depend...

Page 9: ...is almost 69 MPH for Seneca However you need to be able to fly at any speed Use trim After this point generally pitch controls airspeed and power controls altitude Remember the pitch attitude which gi...

Page 10: ...tall warning horn and then feel the buffet Recovery 1 Release back pressure You don t need to push nose down too steep 2 Throttle Full Maintain level flight attitude Don t look inside the cockpit Your...

Page 11: ...degrees up Add back pressure to keep this pitch attitude con stant as airspeed decrease Look at the horizon on the both side of the cowling to judge your attitude Recovery 1 Release back pressure Ful...

Page 12: ...8 729 3383 12 Accelerated stall Commercial pilot At least 3000 AGL for both SE and ME 1 Throttle 15 in hg maintain altitude 2 105 MPH Prop High RPM 3 45 degrees bank coordinated turn 4 Increase back p...

Page 13: ...urn with aileron and rudder 3 When the bank 30 Apply back pressure to keep ALT Add power to keep AS 4 When the bank 45 Private 50 Commercial counter aileron to keep bank constant 5 20 degree before ta...

Page 14: ...n heading Adjust rudder to keep heading constant during power change 3 Nose up 1 MPH sec Maintain heading with rudder Loss of directional control or any stall indication Recovery 4 Right engine Close...

Page 15: ...Fowler Way San Jose CA 95148 Phone 408 729 3383 15 Emergency Descent Entry 1 Throttle Idle begin descent 2 Airspeed 150 Gear down 3 Prop High RPM 4 Maintain 140 MPH with bank as needed Recovery 5 Tar...

Page 16: ...nd stop 3 Set brake Power 2000 RPM Check engine gauges Pump brake a couple of time before apply full power to prevent the airplane from moving 4 Release brake Apply full power 5 85 MPH rotate Set pitc...

Page 17: ...ntain 115 MPH 5 Turn to downwind maintain 115 MPH before landing check 6 Midfield Flap 10 7 At the point where you intercept glideslope Throttle 15 Gear down Prop high RPM Flap 25 Start descend at 105...

Page 18: ...rosswind 4 Level of at TPA Throttle 16 18 maintain 115 MPH 5 Turn to downwind main tain 115 MPH before land ing check 6 Midfield Flap 10 8 Turn base GUMPS check 9 Turn final Flap full adjust airspeed...

Page 19: ...ing 4 Release brake 5 Slightly before rotation speed rotate Lift off at 70 MPH Set pitch up for 80 MPH at 50 ft AGL Try not to chase the airspeed indicator needle Remember airspeed indicator has lag I...

Page 20: ...toe must be on the lower part of the pedal to avoid locking the tire 5 Reduce power flare touchdown Do as you do for normal landing If your approach was correct it will touch down the point If your ap...

Page 21: ...control brake In flight 1 Control Directional control rudder Airspeed Blue line 105 2 Power Mixture Rich Prop High RPM Throttle Open 3 Drag Flap Up Gear Up 4 Identify dead engine Dead foot dead engine...

Page 22: ...ling out on final 1 Level of at TPA Throttle 20 22 maintain at least 105 MPH blue line 110 MPH 2 Turn to downwind maintain 105 MPH blue line to 110 MPH before landing check 3 At the point where you in...

Page 23: ...H 2 Turn to downwind main tain 105 MPH blue line to 110 MPH before landing check 3 At the point where you intercept glideslope Throttle 17 18 Gear down Prop high RPM Flap 10 Start descend at 105 MPH b...

Page 24: ...ain 115 MPH 5 Before landing check except gear and prop 6 Step down Throttle 12 Nose lower for descend 7 Level off Nose level Throttle 16 to 17 enough to maintain 115 MPH 8 FAF intercepting GS for ILS...

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