Beech KingAir 90 flashcards Flashcards

Terms Definitions
what is 2 + 2
4
What is the maximum ramp weight for the U21A?
9,705
What is the max ramp weight for the U21H?
10,255
What is the max gross weight for the U21A?
9,650
What is the max gross weight for the U21H?
10,200
What is the max landing weight for the U21A?
9,168
What is the max landing weight for the U21H?
9,700
What is the maximum certificated altitude?
30,000 MSL
What is the max certificated altitude while using the Scott 02 system?
25,000 MSL
What are the 10 items required for flight into known icing?
Goodrich electrothermal prop de-ice systemEngine Air inlet electrothermal bootsInertial Air Separator systemAuto ignitionWing and empennage surface deice systemHeated pitotHeated stall warningFuel vent heatersalternate static air sourceheated windshield - left only
What is significant about the T5 location in the PT-6 engine?
T5 is the location of the sensors for the ITT indicating system. It is the turbine outlet temperature (after the first stage of the power turbine)
When do the igniters operate?
During engine start and below 400# of torque if the "Auto Ignition" is armed
What RPM is 100% N1?What about 101.5% N1 (max)?
37,50038,100
In addition to a low oil pressure indication, what would indicate a low oil quantity level?
Surging of the propeller RPM
What is the primary force moving the prop toward low pitch/high RPM?What are the two main forces tha tmove the prop to high pitch/low RPM and feather?
toward low pitch: Oil pressuretoward high pitch: counterweights and spring
What is the max RPM for each of the three propeller governors: Primary...Overspeed...Fuel topping...
Primary.......2200Overspeed...2288Fuel topping.2332
What two conditions must be met for the autofeather system to be armed?
autofeather switches armed; N1 88% to 92%
What is the approximate range of the primary governor?
1800 to 2200 RPM
What is the purpose of the Primary Low Pitch Stop?
To prevent an uncommanded reverse in flight
How can the current limiters be checked in flight?
Generators off (push voltage buttons, also switch inverters from L to R)
What is the U21A's fuel capacity?Gallons...Pounds...
370 gallons2479 pounds
Which engine instruments require AC power?
The pressure instruments require AC Inverter power:
TorqueOil PressureFuel Pressure
What is the company minimum start voltage?
22 volts
What is the company minimum start N1?
17% N1
What is the company maximum ITT before normal engine shutdown?
600 C
What is the minimum torque in flight to prevent damage to the Reduction Gear Box?
200 lbs
What is the 0.017" *** in the Fuel control unit return line?
To purge air from the line
Configuration: Emergency descent
Idle/Full; Flaps: approach; Gear:down; IAS 156 Max
Ice vanes should be extended in flight when the temperature is below ~~~ and there is ~~~
+5 C and visible moisture, or in moderate rain*if in doubt*
Name the six emergency engine failure items.
Power up, flaps up, gear up, identify, verify, feather. (Full, retract, retract, ID, Verify, Feather)
What is the tolerance for the secondary low pitch stop test?
210 RPM +/- 40 above the engine idle RPM, or 170 min to 250 max.
When will the warning horn silence work?
Only when the flaps are up; in the approach or down position the silence button won't work.
Additional brake pressure can be applied once the parking brake has been set.
True
Name the max demonstrated x-w component
25 knots
What percentage of flaps may be used for instrument approaches?
For coupled and circling approaches, only approach flaps setting should be used. Up to 60% may be used for straight-in approaches if approach to minimums is likely and runway length dictates.
What is the procedure for an engine fire on the ground?
RIGHT HAND...Idle cutoff; Starter Only (and hold);LEFT HAND:FSOV closed; Fuel pump Off; Crossfeed Closed
Configuration: Climbing 400' to 1000'
1000# / 2000RPMPitch @5 (reset command bars) 140 kias
Configuration: Climbing 0' to 400'
Takeoff # / 2200 RPMPitch @ 7120 kias
Configuration: single engine circling, level
800# / 2200 RPMFlaps ApproachGear up (until descent to land)120 kias
Configuration: single engine approach, inside FAF, precision
800# / 2200 RPMFlaps ApproachGear down120 kias
Configuration: two engine approach, inside FAF, precision
500# / 2000 RPMFlaps approachGear downpitch 3 degrees nose down120 kias
Configuration: single engine, outside FAF, level
as required / 1900 RPMFlaps approachGear upSpeed at discretion
Configuration: Single engine approach, inside FAF, non-precision
700# / 2200 RPMFlaps approachGear down5 deg nose down120 kias
Configuration: Two engine circling approach, level
750 # / 2000 RPMFlaps approachGear down120 kias
Configuration: two engine approach, inside FAF, non-precision
400# / 2000 RPMFlaps approachGear down120 kias
Configuration: climb from 1000' to cruise
1000# 705C max/ 2000 RPMpitch to command barsIAS as per POM
Configuration: two engine holding
500# / 1900 RPMFlaps approachGear up120 kias
Configuration: single engine holding configuration
800# / 1900 RPMFlaps approachGear up120 kias
What engine indicating system is driven by oil pressure?
Propeller Torque (torquemeter)
What is the purpose of the fuel to oil heater?
an oil-to-fuel heat exchanger located on each engine accessory case operates continuously and automatically to heat the fuel sufficiently to prevent freezing of any water in the fuel line.
In addition to a low oil pressure indication, what would indicate a low oil quantity level?
Surging of the propeller RPM
how many fire detection sensors are there?
Three, and they are sensitive to red light
What do the fire detectors sense?
Fire
Give the company torque limits for the following conditions: TakeoffCruise climbCruise
Takeoff: 1315Cruise climb: 1000Cruise: 900
Give the company ITT limits for the following conditions:TakeoffCruise climbCruise
Takeoff: 750Cruise climb: 705Cruise: 690
What action should be taken if oil pressure drops below 60 psi?
Try increasing power to the engine first to see if the low oil pressure is because of reduced engine speed. if that doesn't work, the low oil pressure is probably due to lost oil. Check the oil temperature, and if that is high or increasing, consider shu
What is a rollback and how should the pilot respond during the takeoff roll?
A rollback is any reduction in Power during the takeoff roll.Respond to it by aborting the takeoff with the power levers before rotation speed.
What is a runaway and how should the pilot respond?
A runaway is an uncommanded increase in N1 and torque during the takeoff roll. Its FCU has a governor of its own, and if it malfunctions, it will run N1 up to its limits and consequently run torque up to its limits too.Respond to it by aborting the takeo
What two conditions must be met for the Auto-ignition system to energize?
auto-ignition armed; torque below 400# torque
What are the ratios of the two stages of gear reduction?
2 planetary gears. 3:1 on the first5:1 on the second to make 15:1 total
What is the purpose of the chip detector?
when engine oil contamination is detected, an amber annunciator light illuminates, indicating possibly imminent engine failure.
Where is the chip detector located?
in the nose gearbox drain plug of each engine
List five uses of compressor air:
-bleed air for instruments, heating (P3)-deice boots-burner can cooling-fuel control unit-fuel topping governor
Which governor controls N1 speed during reverse?
The fuel-topping governor works through a series of linkages from the reverse lever to control N1 during reverse. The fuel topping governor changes air pressure through the FCU's Py line to change its overspeed/underspeed condition.
What two conditions exist when the REV NOT READY caution light illuminates?
The prop is
When would the propeller blades normally be on the low pitch stop?
When the power lever is back to idle and the aircraft is essentially motionless: the props seek a faster RPM by a flatter pitch, but resting on the PLPS means they are going to be stuck on that blade angle...about +5*
What is the purpose of the Secondary Low Pitch Stop system?
The SLPS prevents the propeller from flattening pitch enough at low speeds to a reverse-pitch condition. The SLPS is an electrically-controlled, mechanically actuated mechanism that dumps oil pressure from the prop hub were the beta ring to touch the elec
How are the low pitch stop systems reset for beta and reverse operations?
Lifting up on the power lever and moving it behind the 'gate' repositions the primary low pitch stop to allow blade angle as low as -12*. The reverse lever interconnect pulls on the reverse lever attachment, which is connected to the beta ring through ca
To what RPM is the overspeed governor rescheduled when the test switch is activated?
2000 RPM.
The governor is rescheduled below the normal RPM for a given N1/torque to prove the function of the overspeed governor.
What kind, voltage and A/h rating is the battery?
Lead-Acid battery 24 volts34 A/h
What is the current rating for the starter-generator?
250 amps
What is the current rating for the current limiters?
325 amps
Which two components are the current limiters designed to protect?
These limiters protect each generator and the battery from a short circuit on the other generator's main bus.
Full scale of 1.0 on the ammeters represents what load?
a full load of 250 amps
In what year was DA founded?
1967
What is the company mission?
Dynamic Aviation is the leading provider of modified aircraft, leased and operated worldwide in specific niche markets.
What are the 5 company divisions?
Intelligence, Surveillance and ReconnaissanceAirborne Data AcquisitionFire ManagementAerial ApplicationSterile Insect Technique
How many aircraft, bases, countries and continents does Dynamic own and operate?
Karl bought 124 KingAirs from the US Army. Operating are the following:Sixty (60) aircraft on eighteen (18) bases located in nine (9) countries on four (4) continents
Primarily who does DA serve?
Our customers include federal, state and local governments; non-profit research organizations and private corporations.
In which markets does DA serve?
National Defense and National IntelligenceFederal AgenciesState/Local GovernmentsCommercial Industry
Illumination of the Battery Charge light indicates what condition?
The Battery Charge Current Detector (optional equipment) consists of a circuit which illuminates an amber light on the instrument panel whenever the battery charge current is above normal (7-amperes for 6 seconds or longer).
The purpose of the BCCD is to inform the pilot of battery charge currents whcih may damage the battery if it is allowed to continue too long. The system sees all battery current and provides a visual indication of above normal charge current. This syste
What is the maximum battery charge rate before starting the second engine?
0.5 %
What is the minimum #2 N1 for the generator to be turned on?
52%
Which components have failed if there is no power provided to Circuit Breaker Panel bus #1?
L Lip anti-iceL Landing lightVent blower powerLanding gear power*L Inverter controlL Ignitors
Which components would be affected by a failure of Circuit Breaker Panel bus #2?
R lip anti-iceR landing lighttemp control Flap motor powerAir conditionerR inverter controlR ignitors
How can the battery current draw be checked in flight?
look down at the volt - load meters to the left of the pilot's control wheel. The meters normally indicate DC generator load in terms of a fraction of the maximum rated load. 1.0 = 100% of rated load.
What does a BOOST FAIL illumination indicate?
The boost pump has failed and now the engine fuel pump is working alone to provide pressure to the fuel nozzles. It will work for 10 hours before cavitating.
What is the purpose of the fuel transfer system?
To transfer fuel from the inboard wing tank against gravity into the nacelle tank.
What two conditions must be met for the fuel transfer pump to energize?
If the fuel level drops by 10 gallons (to 47) the transfer pump float will connect the pump circuit. The switch needs to be on first.
What condition is signified by the NO FUEL TRANSFER light?
A vacuum tube behind the fuel panel senses the 30 seconds that the transfer pump runs continuously, after which it illuminates a light on the annunciator panel. This indicates that the wing tanks are empty and have no more fuel to transfer into the nacel
If a transfer pump fails in flight, what amount is unusable tank?
If unable to transfer any more fuel from the wing tanks to the nacelle, gravity feed will spill fuel into the nacelles when they are 3/8 full, or 21 gallons remaining. All but 28 gallons will transfer from the wing tanks into the nacelles.
What condition causes the auto-crossfeed to activate?
If the switch is placed into AUTO, a drop in line pressure on one side of the crossfeed valve causes the valve to open and delivers fuel pressure to that side.
What two circuit breakers protect the landing gear system, what is their amperage rating and their location?
1 Landing gear control relay - 50A breaker - fed by both L and R buses
2 Landing gear motor power - 325A buss tie fuse - right buss
What is the expectation for the pilot's hand position during landing gear extension?
Keep hand on gear handle until three green lights to indicate gear down.
What conditions must exist for the gear warning horn to sound?
The gear warning horn is activated by a set of switches on the power levers at 400#.If flaps are down, the horn cannot be silenced.
What process releases the landing gear down lock hook?
The hook automatically unlocks when the plane leaves the ground. It can also be manually overridden by pressing down on the red button placarded DN LCK REL. A safety switch on the right main strut opens the landing gear control circuit when the strut is compressed. The safety switch also actuates a solenoid-operated downlock hook, which prevents the landing gear handle from being raised when the plane is on the ground. The right safety switch also disables the lip anti-ice boots when the aircraft is on the ground.
The parking brake can be engaged using the right side brake pedals
False
Max OAT approved at sea level
37 C
Additional brake pressure can be applied once the parking brake has been set.
True
Max OAT approved at sea level
+37 C
Starter duty times
40 s on60 s off40 s on60 s off40 s on
30 min off
Limitations regarding position of power levers-While in flight-Engines not running
While in flight, do not lift power levers over gate and into reverse
While engines not running, do not lift power levers over gate.
name the following airspeeds:VsoVs1VmcVrVxVyseVyVloVfeVfe appVleVaVne/Vmo
Vso 75Vs1 88Vmc 92Vr 95Vx 101Vyse 111Vy 117Vlo 130Vfe 130Vfe app 174Vle 156Va 169Vne 208
max altitude for air starts
27,000
differences between A and H models
A*wing span ends at landing light*2-position generator switch*Electric boost pumps*4 fuel gages*takeoff weight 9650*no nose bays*no cockpit lighting master switch*SLPS light not automatic off*no vent heat switch
H*20 more inches of wing span after landing light*3-position generator switch*engine-driven boost pumps*2 fuel gauges*takeoff weight 10,200*yes nose bays*cockpit lighting master switch*SLPS light is automatic*yes vent heat switch
Purpose of inertial separators/ ice vanes
to prevent moisture particles from entering the engine inlet penum under freezing conditions...moveable vane introduces a sudden turn in the airstream to the engine and particles continue on undeflected becuase of momentum and discharged overboard. opera
In what situations should the ice vanes be extended?
Before visible moisture is encountered at +5C and below, or at night when in doubt if in visible moisture at +5C and below. IF IN DOUBT
What is the purpose of the bleed air valve (P3)?
high pressure centrifugal bleed air from P3 regulated at 16 psi used to operate the *bleed air heat*air driven flight instruments (copilot)*operate the surface deicer boots.
What symptom could indicate that a BAV failed open?
higher iTT, loss of engine performance on that side, annunciator.
What symptom could indicate that t BAV failed closed?
you don't get bleed air, no indications, no loss of performance or higher ITT
What connects the PT to the CT?
nothing; free turbine turns the prop
Name the kind and # of compressor turbines
Axial - 3 stagescentrifugal - 1 stage
What 2 purposes does the air in the burner can serve?
CoolingCombustion
How many fuel nozzles are there?
14 per engine
how many igniters?
2 igniter plugs per engine; at 4 and 8 O'clock
When do the igniters operate?
at engine start;at torque below 400 #
where are the hottest temps in the engine?
at the exit of the burner can, just before the CT
what portion of the energy produced by the engine is used to drive the PT?
1/3 of the air is used for power
What RPM is 100% N1?
37,500
What two purposes does the approach flap handle setting serve?
Flap operation is controlled by a three-position switch. a side-loaded detent permits APPROACH position (35%) to be selected on extension, adn serves as an OFF position of angles between APPROACH and DOWN (100%).
Why do we reselect the approach flap detent after setting flaps to full for landing?
"flaps set to go-around"
What is the maximum flap setting for a single engine approach?
Approach
What is the maximum flap setting during an approach while still IMC?
For coupled and circling approaches, only approach flaps setting should be used. Up to 60% may be used for straight-in approaches if approach to minimums is likely and runway length dictates.
When is the elevator trim tab AD inspection required?
At each preflight
What danger is inherent in retracting the flaps while on the ground?
You might grab the wrong lever; might grab the landing gear lever.
What system provides cabin heat?
Bleed air heat system from P3 line
On what basis does the pilot select left or right bleed air valve for cabin heat?
look at ITT temps to see which is cooler, and turn that side's BAH on.
What is the engine operational requirement for operating the air-conditioning on the ground?
When operating the air conditioner on the ground, both engines must be running at 60% N1 or a 300-amp ground power unit must be connected to the external power plug.
how long do the surface deice boots remain inflated during manual activation?
When switched to the MANUAL position, all boots inflate and stay inflated while the switch is held in this mode. when released from the manual position, the boots deflate and the toggle returns to the center OFF position.When either the de-ice switch is m
What is the power source for the right side attitude indicator?
Vacuum pressure from ? line
What information does the needle portion of the turn and bank indicator provide?
where the tail is relative to the longitudinal plane of travel of the aircraft...whether the plane is slipping or skidding
How does the pilot select whether GPS or VLOC data is sent to the HSI?
On the GPS, push the CDI button to switch between GPS and VLOC
The most accurate determination of engine oil level is made within ? minutes of shutdown?
? 10 ?
What is the company minimum engine oil level?
1 quart low when oil is hot
What action should be taken if N1 drops below 50% when the generator is turned on?
turn generator off and then boost N1
To prevent ? the pilot should advance condition and power levers slowly from the idle and low idle positions
Overtemping
Props levers are moved to feather when what condition is met during engine shut down?
30% N1 because at that speed, the gas generator is going slowly enough so as to not vacuum up dust and damaging particles, yet the parts inside are moving fast enough to evacuate the prop hub of oil when you move the prop levers to feather.
Use ? before ? for taxi speed management and deceleration on landing
Beta/reverse blade angles
observe a minimum of a ? knot margin for flap and gear speeds
5 knots
upon landing, the propellers should be repositioned from reverse to beta when decelerating through ? knots
40 knots
Ensure a minimum N1 of ? on the starting engine before turning on the cross generator.
10% N1 on the #1 engine
What are two reasons for fueling the nacelles before the aux tanks?
Servicing the nacelle tanks first prevents fuel transfer through the gravity feed interconnect lines from the wing tanks into teh nacelle tanks during fueling. If wing tanks are filled first, fuel will transfer from them into the nacelle tank leaving the
What action should be taken if fuel is observed dripping from the high pressure fuel pump drain line at the aft portion of the engine?
If the fuel is dripping out of the HPP drain line for sure the FCU and HPP will need to be changed. If there is any way to isolate the HPP drain line from the rest of the gang drain and run it into a bottle to be sure that that is where the fuel is coming
What is the takeoff briefing structure?
Power setting, autofeather status, distance for accelerate/stop, decision speeds, type of departure (direction and altitude of departure)"This is a reduced-power, autofeather-armed takeoff with 4500' needed for accelerate-stop, decision speeds are 70 and
Electrical system:Battery ratingStarter/generator ratingpurpose and rating of buss tie fuse
Battery: 24 voltStarter/generators 28-V, 250 ampBuss tie fuses - 325-amp current limiters - protect each generator and the battery from a short circuit on the other generator's main bus.
What are the three fuel vents for?Recessed ventHeated ventFlush vent
Nacelle tank vent
*all three vents are interconnected*
Recessed - recessed ram scoop vent, coupled to a heated extended vent located on the underside of the wing adjacent to the nacelle. Ram scoop acts as a backup vent should the heated vent become blocked.
Heated - heated to prevent icing.
Flush vent - adjacent to wing tiedown.
Nacelle tank vent - independent vent coming from the filler neck to vent the system in the event the normal vent system would become plugged.
How does the Primary Low Pitch stop operate?
The PLPS is a mechanical limit actuated by the beta ring that locks the propeller at a 5-degree pitch. At the point of contact, the PLPS closes a valve in the governor which locks in oil pressure in the lines. If the PLPS fails, it is backed up by the Secondary Low Pitch stop.
How does the Secondary Low Pitch Stop operate?
If the PLPS fails, then the beta ring moves forward past the point it would normally be stopped by the function of the PLPS. Next the beta ring touches the SLPS sensor - an electrical contact - which actuates a valve stationed on the governor and closes off the oil to the prop.
MX manual: "The secondary idle low stop sensor is located on the lower right side of the engine, just aft of propeller spinner bulkhead. The sensor is actuated when the primary low pitch stop system fails and acts to prevent propeller reversing."
How can we test the SLPS?
Position the Low Pitch Idle Stop Test switch down, and this reschedules the SLPS to engage at 210 +/- 40 RPM faster than Idle. Pull each power lever into Beta until RPM rests on that target RPM, and pull it further to assure that the SLPS is active. The
How can we test the autofeather system?
with Autofeather test switch depressed, move the power levers up to 500#. take each power lever individually down to 400# then to 200#, observing the Autofeather lights. At 400#, the opposite light should extinguish, and at 200# the same-side light shou
How can we test the overspeed governor?
Normally the overspeed governor will regulate prop hub oil pressure if the prop RPM exceeds 2288. For testing purposes, the overspeed governor can be derated to hold 2000 RPM instead of 2288. Hold the Overspeed Governor test switches up, then increase p
When testing play of the propeller blade tips, what are the limits until the propeller needs to be inspected by a mechanic?
end vertical play 0.060"fore-aft play 0.068"
What is the relationship of*Primary Governor*Secondary Governor*Overspeed Governor*PLPS*SLPS?
The Governor system manages blade angles at high RPM and high power...*Primary governor keeps a prop at full power between 1800 and 2200 RPM.*Secondary governor prevents RPM from speeding past 2288*Overspeed governor prevents RPM from speeding past 2332.
The Pitch Stop system manages blade angles at low RPM and low power...*PLPS is a mechanical stop on the CSU spindle. The stop rests on the reversing arm in flight idle position, which corresponds to 15* pitch minimum. As long as the prop speed as turned by the engine is greater than 1800 RPM, the governor is working the full range of the prop RPM from 1800 to 2200. In other words, the limit of the governor underspeed is 1800RPM. Below this is 15* blade pitch, where the PLPS is. The PLPS is adjustable by the reverse lever. Lifting the levers on the gate 1) engages the reverse interconnect rod with the reverse lever on the beta ring, and 2) opens the switch for the SLPS so that it does not engage since it is a safety backup. The reverse lever m
Describe the following engine stations:P1P2P2.5P3P4P5P6
1 Air inlet2 Entry to the compressor2.5 Between the axial and centrifugal stages of the compressor3 Exit from the compressor discharge: Bleed air valve (heat, boots, instrument air)4 Combustion chamber exit5 Between CT and PT (ITT probe)6 Exit from PT7 Exit from the exhaust port
Station 1 is the air inlet. Station 2 is the entry to the compressor. Station 3 is the exit from the compressor. Station 4 is near the exit from the combustion chamber. Station 5 is between the compressor turbine and the power turbine. I believe station 6
what is Py pressure?
pressure going to the FCU for air/fuel measurements
Why should you never lift the power levers and pull them into beta/reverse mode without the engine running?
you will damage the reverse lever or one of the interconnect rods attached to it.
What is the typical empty weight of a DA BE90?
5,150
Wing tank fuel capacity(usable per tank
128 gallons/side
Nacelle tank fuel capacity(usable per tank)
56 gallons/side
Engine oil capacity
14 quarts3.5 gallons
Company minimum engine oil for dispatch
13 quarts (read as 1 quart low)
How can you know if the primary low pitch stop is operable?
Whenever the propeller RPM is below the selected governor RPM, the propeller blade angle is at the low pitch stop. If the RPM maintains the selected speed at very low power, then the prop is getting into lower blade angles and most likely the PLPS broke s
What indicates failure of the primary governor?
This is a runaway condition. As the propeller's speed reaches 2288RPM, the overspeed governor will begin increasing blade angle to a higher pitch, to prevent the RPM from continuing its rise. From a pilot's point of view, a propeller tachometer stabilized
A customer wants to hook up external power to the aircraft. Why do we want to keep the battery on during this time?
The battery switch should be ON when maintaining external power in order to absorb voltage transients. Otherwise, the transients might damage the many solid-state components in the airplane. For starting, external power sources capable of at least 1000 a
What are the important blade angles as regards the PLPS, SLPS, and reverse?
PLPS: ranges from +15* to -05* blade angle (Beta)SLPS: if the PLPS fails to arrest blade angle by 12*, then the beta ring will touch the SLPS contacts and compete the circuit to the SLPS annunciator and the oil dump valve.Reverse: Beta plus power range fr
What actions should not be taken if a SLPS warning illuminates at low speed (110kts) and low power (below 400lbs)?
The PLPS system didn't engage properly and the SLPS did, which means that the PLPS system is probably broken. If the SLPS light comes on during low power, unfortunately the SLPS is probably failed closed and oil is draining from the prop hub uncontrollab
What is the nominal landing distance in calm wind? with 10-kt tailwind, 30C and 3000'MSL?
2100'2850
What is the nominal landing distance in calm wind? with 10-kt tailwind, 30C and 3000'MSL
17002950
What is the nominal range of the aircraft? [email protected]# torque
?
Essentially what is the Beta ring for?
The Beta ring represents a propeller pitch and is sensed by the primary governor and SLPS.
128 U-21s that were used in Vietnam War and de-inventoried in 1985sold to Karl for spare parts along with 65 trailerfuls of airplane pieceshe intended to use them to rebuild
he also has posession of 8 DC-9s. he's preparing a trailer to go out west and pick up the fuselage from the engines forward to bring back to VBW and use it for demonstration/ model.
security clearance costs the gov't $30,000
128 U-21s that were used in Vietnam War and de-inventoried in 1985sold to Karl for spare parts along with 65 trailerfuls of airplane pieceshe intended to use them to rebuild
he also has posession of 8 DC-9s. he's preparing a trailer to go out west and pick up the fuselage from the engines forward to bring back to VBW and use it for demonstration/ model.
security clearance costs the gov't $30,000
where are the high and low oil pressure sensors and why are they in the system?
they are for redundancy... both of them have to sense the pressure drop before they cue the autofeather dump valve.
where is the autofeather dump valve? what does it do?
the autofeather dump valve is on the 9 o/clock position just below the prop governor. when receiving dual signals from the pressure sensors - one from the high and one from the low - the valve dumps pressure from the prop causing it to feather.
where is the secondary low pitch stop valve?
the secondary low pitch stop valve is to the left of the governor. when the SLPS is actuated, the valve closes and locks the oil pressure inside the hub.
where is the SLPS governor and how does it work?
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