✈️Aviation Insight✈️

B737 Gear에서 타이어를 제거하면 아래 사진과 같은 Brake assembly가 나온다  brake assembly는 크게 Piston / Pressure plate / Multi disc(5 rotor, 5 stator)로 구성되어있다. brake assembly에는 Steel 과 Carbon 두가지 재질이 있다. 브레이크를 밟으면 piston이 pressure plate를 밀어 stator disc와 rotor disc를 압착시켜 그 마찰력에 의해 제동이 걸리게 하는 원리이다.B737의 브레이크 시스템은 크게 3가지로 분류할수 있다.Normal brake systemAlternate brake systemAccumlator brake systemNormal brake system은 HYD SYS..

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..

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..

Landing gear2 Main gear + 1 Nose gear : 각 기어별 2개의 wheelNose gear 전방으로 Retract되며, Snubber가 wheel을 멈춰준다. Door는 gear에 mechanical로 link되어 있으며, gear down 후에도 계속 open되어 있다.Main gear Door는 main gear strut에 attach되어 있으며, gear가 retract된 후 wing과 fuselage opening 부분을 커버해준다.outboard wheel의 rubber seal & oversized hubcap이 fairing을 complete 시켜준다. Landing gear indicator controls and indicationsLanding gear lev..