Hydraulics/Airframe Flashcards
Hydraulic service
MIL-PRF-83282
Hydraulic characteristic
Coolant Incompressible Non corrosive Lubricant Synthetic based Hazardous
Combine hyd components
Reservoir Shutoff valve Hyd pump Pressure gauge Check valve Accumulator Filter Solenoid operated isolation valve Relief valve
Combine hyd reservoir serviced to?
3.34 Gal
Caution light illuminates when fluid level goes below?
2/3 of the serviced capacity.
14th stage bleed air at?
40 psi
Hyd shutoff valve
In nacelle
Close by pulling T-handle will close all four.
Combine pumps
25 gal/min
3000psi
Hyd press gauges
26vac transformer bus no 1&2
Hyd accumulators combine and flight volume?
Combine 100 cubic inch
Flight 50 cubic inch
Accumulator features
Prevent hyd shock to system
Supplements pump outputs if output not sufficient.
Combine hyd accumulator nitrogen PRECHARGE?
2000 -/+ 100 psi
Filter purpose
Keeps impurities out of critical areas of system
Filter red button pops at ____ psi deferential
70 +- 10
How many total filters bypass and non bypass.
15 total
9 bypass
6 non bypass
Bypass filter ops
Allows bypass flow of clogged element.
Identify by a large hex nut safety wired to the side of the body.
Non bypass filter
Clogged element will block outflow filter
No large hex nut
Combine hyd subsystem?
E gen Windshields wiper Nose-wheel steering Brake (2200psi) Landing gear Flaps Cat extend Wing fold/ jury strut Ramp Tail hook (up) Tail skid
Hydraulic filters location?
2 in the nose (3,4) 3 near combine system 5 near flight system 1 starboard side (8) 2 tail (10,13) 1 each engine (1,2)
Before selecting tail hook down, position the hydraulic isolation valve to?
TO & LDG
Combine system relief valve ops
Open:
Full open:
Close below:
3400 psi
3785 psi
3100 psi
Flight reservoir serviced capacity to?
1.31 gal
Caution light illuminates when fluid goes below?
2/3
Flight pumps
7.5 GPM
3000 psi
Flight system pressure gauge?
2000 +/- 100 psi
Flight system relive valve?
Open:
Fully open:
Close below:
3400 psi
3785 psi
3100 psi
Actuator purpose
Turns fluid into mechanical action
4 type of actuator?
Single: fluid applied one side piston
Double: either side piston
Tandem: two double acting actuators joined together.
Rotary: converts fluid energy into rotary motion.
____ ruder actuators with ____ series (flt hyd) actuator.
3 : 1
Flap handle
Four position handle 0,10,20,30 degree.
Two extra, emergency up & down
Emergency flaps, electrical fail?
Use manual hydraulic override, with aft crew help.
Emergency flaps, hyd fail?
Use electric motor via E up & down position on flap handle.
Windshield wiper ops?
Max rate 325 beats / min
Wing fold/lock lever controls
With weight on wheels (WOW), 28 VDC signals selector valve to active wing fold actuator.
Wing-fold meshanism
Hyd wing actuator
Hyd wing locks
Mechanical safety latches
Timer check valve
Warning flags
Wing spread-sequence-safe for flight.
Wing spread response is:
Spread, locked and free (ailerons) with wingtip and flush flag.
Jury struts
Near wing tips, actuator pops open a hook which attaches to pin on vertical stab with wings folded.
Wingfold/spread reqs
Flap must be at 20 degree
Should not cycle hyd equip with wing fold actuation.
Whats required for wing-fold / spread manual override
Hyd power (Jenny)
Nosewheel steering
The nosewheel steering system improves the ground handling capabilities of the aircraft.
Electrically engaged, hyd operated
+/- 58 degree either side of centerline
Centering cam centers gear when retracted.
The yaw damper?
Functions automatically to augment short period lateral damping.
Steering damper
Permit control of nose-wheel steering 58 degree to the left and right of the a/c centerline.
Landing gear safety lock
Prevent raising gear on deck
Located on port side of center pedestal.
Wheel/flap indicator
Gear up and lock
Barber poles, gear in transit
Gear down and luck
Wheels warning light
Flap > 10 degree
PLA below minimum cruise
Gear not down and lock
Nosewheel it consists of?
a dual-wheel unit,
a nosewheel steering mechanism,
a catapult tow link,
and a drag brace on a hydraulic shock strut.
The tailskid operates in conjunction with?
the main landing gear.
When is a SKID NOT DOWN indicator will
Appear on the caution lights panel?
If the tailskid remains up when the aircraft is in a landing configuration.
Where the tailskid selector valve is located?
on the right side of the fuselage forward
of the cargo ramp and can be manually operated to raise or lower the tailskid in the event of electric solenoid failure.
The emergency brake accumulator is precharged with nitrogen to?
800 psi at 70 F +/- 15 psi
A tow link mounted forward of the nose gear is used to?
guide
the aircraft to the shuttle from the lead-in track and to attach the aircraft to the shuttle.
A trail bar bellcrank aft of the nose gear strut attaches the aircraft to the catapult through a release element designed
to fail at?
53,000 pounds of tension.
When is the TOW LINK caution light will come on and the approach lights will flash.
if the tow link is not in the intermediate position
When the nosewheel is cocked past the 10 position with weight off the left main strut.
The main gear strut extender system is for what?
to provide sufficient clearance
between the aircraft tailskid and deck hardware during catapult launch.
the two extender pistons, increasing the length of each shock strut approximately?
8 inches.
What protect the aft fuselage during landing?
Tailskid
How are the two forward door main landing gear operated?
Hydraulically
How are the two aft doors MLG operated?
Mechanically connected to the shock strut
What type of brake the COD has?
A tri metallic, self adjusting, disk type hyd brake.
The L & R air/ground safety switches operate when the strut is?
1.0 in from fully extended position.
The left compression switch operates after the strut has compressed?
9-0 inches
Type of COD flap?
Fowler type
What driven the flaps?
Central gearbox hydraulic motor
What cause the cat extend caution light to come on during Taxi?
If the nosewheel has turned past 60 degrees
What kind landing gear does the C2 has?
Retractable tricycle landing gear
What is displayed in the wheel window, if a gear is not in the selected position?
Barber pole
What type landing gear does the C2 has?
Tri metallic, self adjusting, disk type brake.
