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The utility system operates at ... psi
Two ..., one on HYD 2A and one on HYD 2B reduce utility circuit pressure to ... psi when pump output is ... psi.
Two pressure reducers, one on HYD 2A and one on HYD 2B reduce utility circuit pressure to 3,000 psi when pump output is 5,000 psi.
Each system is pressurized by ...
a single, dual pressure (3,000 and 5,000 psi), variable displacement pump mounted on an AMAD
A ... relays system pressure to a hydraulic pressure gauge in the cockpit.
hydraulic pressure transducer
Hydraulic cautions (HYD 1A, HYD 1B, HYD 2A, HYD 2B) are set when individual hydraulic pressure switches detect circuit pressure below ... psi.
Range of acceptable hydraulic pressure is
2,600 to 3,300 psi and 4,500 to 5,400 psi
RLS, what is it
Reservoir level sensing
1. When reservoir fluid level drops to approximately 50%, RLS shuts off circuit A (HYD 1A or HYD 2A caution).
2. If fluid level continues to deplete to approximately 30%, RLS restores circuit A and shuts off circuit B (HYD 1B or HYD 2B caution).
3. If alternate circuit shutdown fails to isolate the leak, RLS restores circuit B (no cautions) at approximately 15%, providing hydraulic pressure to both systems until fluid depletion (both cautions).
Following a drop in primary circuit pressure (less than ...), the switching valve ... and tests downstream pressure to make sure its actuator(s) was not the leakage source which caused the primary circuit loss.
Following a drop in primary circuit pressure (less than 900 ±100 psi), the switching valve automatically shuts off the primary circuit and tests downstream pressure to make sure its actuator(s) was not the leakage source which caused the primary circuit loss.
FCC monitoring detects pressure loss during switching valve logic and inhibits FCC actuator failure detection logic for ... to allow the switching valve time to function
Switching valve operation is completely ...
hydro‐mechanical, separate from electrical inputs or FCS reset commands
The switching valve transfers to the primary circuit any time primary circuit pressure recovers above ... psi, regardless of the valve position or the backup circuit pressure level
With a HYD 2 failure APU accumulator pressure can be used to
- 1. Emergency extend the landing gear or refueling probe inflight.
- 2. Provide emergency nosewheel steering on the ground.
- 3. Aid the brake accumulator with emergency braking
A fully charged brake accumulator provides a minimum of ...
ten full brake applications.
The BRK ACCUM caution is displayed when brake accumulator pressure drops below ... psi.
*approximately five full brake applications remain before the brake accumulator is empty.
the HYD ISOL switch may need to beheld for up to ... to remove the APU ACCUM caution and provide a full charge
*(up to 40 seconds following an in‐flight APU start)
If an APU ACCUM caution appears in flight and is not related to emergency gear/probe extension or APU start, ...
it may indicate a possible leak in the isolated HYD 2B system. A BRK ACCUM caution in flight is not normal and may indicate a possible leak in the isolated HYD 2B system.
Utility hyd functions are powered by ... and they are...
- 1. landing gear extension and retraction
- 2. nosewheel steering
- 3. wheel braking and anti‐skid
- 4. launch bar extension
- 5. arresting hook retraction
- 6. in‐flight refueling probe extension and retraction.
Each main landing gear assembly incorporates a planing link, which is designed to ...
properly align the main wheelsafter landing gear extension
moving the LDG GEAR handle to the DN position sends a ... signal to the landing gear selector valves to initiate normal landing gear extension
Emergency landing gear extension ...
opens the hydraulic arming valve and directs APU accumulator pressure to the emergency selector valves. APU accumulator pressure is used to unlock the doors, release the landing gear uplocks,and is applied to the drag brace locking actuator and sidebrace downlock actuator
The DOWNLOCK ORIDE button, located ..., is used to ...
The DOWNLOCK ORIDE button, located on the lower left main instrument panel outboard of the LDG GEAR handle, is used to override the downlock solenoid
If the DOWNLOCK ORIDE button is pressed or the mechanical stop is not fully engaged, the LDG GEAR handle can be raised on the ground, and the main landing gear will .... The nose gear will ...
If the DOWNLOCK ORIDE button is pressed or the mechanical stop is not fully engaged, the LDG GEAR handle can be raised on the ground, and the main landing gear will retract. The nose gear will not retract with weight onthe nose gear.
Landing gear warning light and warning tone serve to...
to indicate a mismatch between LDG GEAR handle position and actual gear position, to warn of a planing link failure,and to provide a “wheels warning.”
The warning tone is inhibited for ... to allow for normal landing gear extension and retraction.
when the LDG GEAR handle is UP, a flashing warning light accompanied by the warning tone will be activated when ...
- 1. airspeed is below 175 KCAS
- 2. altitude is less than 7,500 feet
- 3. rate of descent is greater than 250 fpm.
If a landing gear position light is out with the LDG GEAR handle DN and the landing gear warning light out, a LT TEST should be performed to test the integrity of the position light bulb. If the bulb tests bad, ...
it is safe to assume thatthe gear is down and locked
- Low gain: 22.5°
- High gain: 75°
With loss of yaw rate information to the FCCs,...
directional PIO may occur during aggressive ground tracking.
When failed, the NWS system reverts to a ...
360° free‐swiveling mode.
When emergency high gain NWS mode is entered, ...
NWS indications may not be displayed on the HUD. As a result, inadvertent nosewheel steering actuation may injure ground personnel.
Each wheel brake assembly has a brake wear indicator pin, located ... . When the brakes are applied and the indicator pin is ..., the brake pads require changing.
Each wheel brake assembly has a brake wear indicator pin, located on the inboard side of the wheel. When the brakes are applied and the indicator pin is flush or below flush with the brake housing, the brake pads require changing.
Failure of either wheel speed sensor can lead to an anti‐skid failure,resulting in ...
a complete loss of brakes. Placing the ANTI SKID switch to the OFF position or pulling the EMERG BRK handle will bypass the faulty system and restore braking ability. Judicious braking must be used, as the anti‐skid system is not available. Refer to the BRAKES FAILURE/EMERGENCY BRAKES procedure.
Touchdown protection delays initial brake application on landing by completely dumping brake pressure until ...
- 1. weight is on the right main landing gear and wheel speed is over 50 knots
- 2. if a wet runway delays wheel spin‐up,for 3 seconds after landing
If the speed of one wheel drops ...% below the other wheel, locked wheel protection dumps brake pressure to both wheels until the speed of the slower wheel returns above ...% of the other.
If the speed of one wheel drops 40% below the other wheel, locked wheel protection dumps brake pressure to both wheels until the speed of the slower wheel returns above 40% of the other.
Below ... knots, anti‐skid is completely disabled.
Locked wheel protection is removed below ... knots, so that full braking performance (including locking a tire) is available for taxi and turning operations.
Anyforce greater than approximately ... lbs applied to the pedals (...) will likely result in blown tires with either the ANTI SKID switch OFF or emergency brakes selected
Anyforce greater than approximately 55 to 60 lbs applied to the pedals (6° to 7° of pedal rotation) will likely result in blown tires with either the ANTI SKID switch OFF or emergency brakes selected
Do not cycle the ANTI SKID switch in response to an ANTI SKID caution immediately prior to landing. Cycling the ANTI SKID switch removes the ANTI SKID caution for up to ... seconds as the system performs IBIT even though the anti‐skid system may still be failed and, if the system is not failed, wheel motion at touchdown may cause a false BIT failure and a dump of normal brake pressure when brakes are applied.
If the ANTI SKID switch is not placed to ... with an ANTISKID caution displayed, ...
If the ANTI SKID switch is not placed to OFF with an ANTISKID caution displayed, normal braking capability may be lost completely.
The position of the EMERG BRK handle ...
is the only indication that emergency braking is selected: no warning or caution is displayed. The EMERG BRK handle must be fully stowed to make sure that normal braking with anti‐skid is available.
the EMERG BRK handle may not return to the fully stowed position unless ...
The PARK BRAKE caution will come on to alert the pilot that the parking brake is still set when both throttles are advanced above about ... N2 rpm (INS on)
Failure to place the LAUNCH BAR switch to RETRACT prior to catapult launch ...
may result in launch bar hydraulic seal failure and possible loss of HYD 2A.
Typically pulling the LAUNCH BAR CB will only be required if...
- 1. the LAUNCH BAR switch failed in the EXTEND position with weight on the nosegear
- 2. the nose gear failed WonW after launch and the pilot failed to place the LAUNCH BAR switch to RETRACT.
The L BAR warning will illuminate if...
- 1. Launch bar not up and weight off the left main gear.
- 2. Launch bar not up and left main gear not down.
- 3. LAUNCH BAR switch in EXTEND and weight off the left main gear.
- 4. LAUNCH BAR switch in EXTEND and left main gear not down
The arresting hook is extended by...
Wings will only fold if FCC determines that...
- 1. weight is on wheels
- 2. both wings are unlocked at greater than 66 KCAS or onewing is unlocked at or less than 66 KCAS
- 3. the ailerons are faired,