✈️Aviation Insight✈️

In this lesson we will discuss the following aspects of the Brake System: Hydraulic Power Source, Alternate Brakes, Brake Accumulator, Antiskid, Autobrakes and Parking Brake. Hydraulic System B powers the normal brakes and System A powers the alternate brakes. System A automatically supplies power to the alternate brakes when System B pressure is low or fails. System B supplies pressure for the ..

In this lesson we will discuss the following aspects of Nose Wheel Steering: Power Sources and Steering Controls. Normally, Hydraulic System A provides power to the Nose Wheel Steering System. When the NOSE WHEEL STEERING switch is placed to ALT, power is from System B. If System B reservoir fluid is lost due to a leak downstream of the Landing Gear Transfer Unit, a sensor closes the Landing Gea..

In this lesson we will discuss the following aspects of Air / Ground Sensing: Air / Ground Logic and Weight-On-Wheels Sensors. There are differing requirements for certain aircraft systems, depending on whether the aircraft is on the ground or airborne. The aircraft state is sensed by logic signals from the air / ground system. Six sensors are used, two on each gear. Air / Ground Logic effects r..

The LANDING GEAR lever has three positions, UP to retract the gear, DN to extend the gear and OFF to remove hydraulic pressure from the system. The LANDING GEAR lever incorporates an Override Trigger, which permits the LANDING GEAR lever lock to be bypassed and the gear to be raised. The top LANDING GEAR indicator lights are illuminated red when one or more of the gear is in disagreement with th..

Normal pressure: 2900-3600 psiMaximum pressure: 3600-4000 psiNormal precharge: 1000psi Brake temperature light: illuminate (AMBER)하나 이상의 브레이크의 온도가  4.9를 넘을때DU상 Hot brake condition이 존재하지 않을 때 extinguishMFD SYS SW SYS을 push, lower DU상 brake temperautre indication을 시현또는, Main panel DU SW가 INBD MFD position에 위치한 경우는 inboard DU에 시현두번 PUSH하면 각 DU에서 indication이 제거됨Brake temperature: wheel brake tempera..

Pakring brakeBrake pedal과 parking brake lever로서 Control(Set or Release)한다.Set parking brakeBrake pedal press and holdparking brake lever pull to lock positionbrake pedal release; Red parking brake warning light가 onpakring brake system 과 anti skid system은 관련이 없지만, parking brake system에 fault 발생시 ANTI SKID INOP light가 ON된다. Release parking brakeparking brake lever가 release될 때까지 brake pedal을 press ..

Auto brakesbrake system은 rejected takeoff 및 landing 시에 auto brake를 제공한다.Auto brake는 Normal brake system에서만 작동한다.Switch positionRTO: Takeoff전 ground에서만 사용한다.AUTO BRAKE DISARM light가 1-2초간 On된 후 Off된다. 이는 self-test complete correctly를 의미한다.Wheel speed > 90kts, Thrust lever IDLE 조건에서 auto brake system은 maximum brake pressure를 제공한다.Takeoff 후에는 반드시 OFF에 둔다.OFF: Auto brake system이 Disarm된다.1, 2, 3, MA..

Red landing gear lightGear가 up 또는 down position에서 lock 되지 않으면 On된다.만약 ground에서 red light 가 on 되어 있다면, gear sensor failure(Dispatch 금지) Brake normal operationbrake system은 normal brake(accumulator 포함)와 alternate brake system으로 구성되어 있다.HYD power; HYD SYS B-> Normal brake, HYD SYS A-> Alternate brakenormal brake가 fail되면, brake system은 자동적으로 alternate brake를 선택한다.Brake pressure accumulatorboth HYD s..

Trouble regarding retraction이륙 후 #1 engine failure시 hydraulic system A는 EMDP(electronic motor driven pump)만 작동된다.Landing gear transfer unit이 hydraulic system B pressure를 사용하여 landing gear를 retract한다.Landing gear retraction and extension, as well as nose wheel steering, receives power from Hydraulic System A.System B is the alternate source of hydraulic power for the nose wheel steering.Lever stu..

Landing gear retractionThe top LANDING GEAR indicator lights are illuminated red when one or more of the gear is in disagreement with the lever position. This is normal when the gear are in transit, but may also indicate an unsafe condition.Main gear가 retract될 때, Wheel brake가 작동되어 Wheel spin을 stop시켜 준다.HYD SYS A가 landing gear를 retract 시킨다.Landing gear가 Up and Lock되면, RED light 가 OFF된다. (The RED ..