Mayday
International radiotelephony distress signal used to indicate a grave and imminent threat requiring immediate assistance.
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Emergencies
Browse Emergencies terms for pilots, air traffic controllers, cabin crew and aviation learners.
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Pan-Pan
International urgency signal indicating a situation requiring assistance but not immediately life-threatening.
View term不守规矩的乘客
A passenger whose disruptive or violent behaviour interferes with the safety or order of the flight and crew instructions.
View term严重颠簸
Turbulence causing large, abrupt changes in altitude and/or attitude, usually resulting in momentary loss of control and difficulty in maintaining aircraft control.
View term中断起飞
A procedure in which a take-off is intentionally aborted by the flight crew after the aircraft has started to roll but before it has lifted off the runway.
View term乘客氧气面罩释放
The automatic or manual release of oxygen masks for passengers in response to cabin depressurization or smoke.
View term仅电池供电
A condition where the aircraft’s electrical system is operating solely on battery power, typically due to the failure of all generators or external power sources.
View term使用救生筏
The procedure of deploying and utilizing inflatable life rafts by crew and passengers following a water landing, in accordance with emergency protocols.
View term使用机翼上方出口
The operation of over-wing emergency exits by passengers or crew during evacuation procedures, usually in the case of land or water evacuations.
View term冲压空气入口
An air intake system that uses forward motion of the aircraft to force external air into ducts for ventilation or pressurization.
View term冲压进气门故障
A malfunction where the ram air inlet door fails to open or close properly, affecting ventilation and cooling of avionics or cabin systems.
View term刹车过热
A situation in which the aircraft's braking system exceeds safe operating temperatures, potentially reducing effectiveness or causing damage.
View term劫机
The unlawful seizure of an aircraft by an individual or group, often involving threats or force, during any phase of flight.
View term医疗紧急情况
A critical health-related situation on board requiring immediate attention and possible diversion to the nearest suitable airport.
View term双发发动机故障
A critical emergency situation where both engines of a multi-engine aircraft cease functioning in flight.
View term双发熄火
A critical emergency in which both engines of an aircraft stop producing thrust due to flameout, often requiring immediate gliding and restart procedures.
View term双液压系统失效
A simultaneous failure of two independent hydraulic systems on an aircraft, significantly degrading control and operational capability.
View term发动机故障
A condition where one or more aircraft engines cease to provide thrust, requiring immediate emergency procedures.
View term发动机灭火瓶
A pressurized container installed in aircraft engines used to release extinguishing agent when a fire is detected.
View term发动机脱落
A catastrophic in-flight event where the engine detaches from the aircraft structure, requiring immediate emergency handling.
View term地形警觉警告
A warning generated by aircraft systems indicating proximity to terrain that may result in controlled flight into terrain (CFIT).
View term备用仪表系统
An independent set of basic flight instruments that provide critical information in case of primary display failure.
View term备用刹车系统
A backup braking system used when the primary brake system fails or becomes unavailable.
View term备用控制律
A degraded mode in fly-by-wire aircraft providing limited flight envelope protections, used when normal law is lost due to system faults.
View term失压
A condition in which an aircraft's cabin fails to maintain the required pressure differential compared to the outside atmosphere.
View term失速警告
An alert that warns the pilot of an impending aerodynamic stall, usually through audible or tactile signals like a horn or stick shaker.
View term安全检查
An official inspection of an aircraft or passengers by security personnel to ensure no security threats are present.
View term客舱冒烟
Presence of smoke in the passenger or flight deck cabin, indicating potential fire requiring immediate attention.
View term客舱失压
A sudden or gradual loss of cabin pressure, requiring immediate response such as emergency descent and oxygen use.
View term客舱安全检查
A safety verification by cabin crew to ensure passengers are seated, seat belts fastened, cabin items stowed, and emergency equipment is ready before take-off or landing.
View term客舱撤离
An emergency procedure where passengers and crew exit the aircraft rapidly using all available exits, typically initiated after landing or in a critical situation.
View term尾部触地
An incident in which the tail of the aircraft contacts the runway surface during take-off or landing due to excessive pitch attitude.
View term应答机代码7700
The ATC transponder code universally set to indicate a general emergency, alerting controllers to an onboard emergency situation.
View term异常控制律
A rare fallback flight control law in fly-by-wire aircraft used under severe system failures where no flight envelope protections are available and handling characteristics are degraded.
View term异常程序
A specific set of steps followed by pilots to address system malfunctions or unusual situations not classified as emergencies.
View term引气泄漏
An unintended escape of high-pressure air from the aircraft bleed air system, which may affect pressurization, anti-ice, or environmental control systems.
View term快速减压
A sudden and unexpected loss of cabin pressure, requiring immediate descent and use of supplemental oxygen.
View term快速参考手册
A cockpit manual containing condensed checklists and procedures for abnormal and emergency situations.
View term急救箱
A collection of supplies and equipment for use in giving first aid in case of minor injuries or medical needs onboard.
View term手动起落架放出
The deployment of the aircraft's landing gear using a non-powered, manual backup system in the event of hydraulic or electrical failure.
View term操纵杆振动器启动
The activation of a device that rapidly vibrates the control column to warn the pilot of an impending aerodynamic stall.
View term方向舵完全偏转
A condition in which the rudder deflects fully to one side due to system failure or malfunction, potentially causing severe yaw deviation.
View term时间关键检查单
A checklist containing emergency procedures that must be executed immediately to prevent loss of control or further danger.
View term最低燃油
A state where an aircraft’s fuel supply has reached minimum landing level; any additional delay may lead to emergency.
View term机组人员使用氧气面罩
The action taken by flight crew to don oxygen masks during situations such as smoke, fumes, or cabin depressurization.
View term水上着陆
An intentional or emergency landing of an aircraft on a body of water due to operational necessity or system failure.
View term水上迫降演练
A procedure practiced by cabin crew and passengers for emergency water landings, including life vest use, brace position, and evacuation steps.
View term洗手间烟雾探测
An alert triggered by smoke sensors in the aircraft lavatory indicating possible fire, requiring immediate cabin crew and cockpit response.
View term液压系统故障
A malfunction in the aircraft's hydraulic system, potentially affecting control surfaces, landing gear, or brakes.
View term液压过热
A condition in which the aircraft hydraulic system exceeds its normal operating temperature limits, potentially leading to system degradation or failure.
View term火灾警告
Automated alert indicating detection of fire or overheat in an aircraft system area, requiring immediate crew action.
View term炸弹威胁
A reported or suspected presence of an explosive device on board an aircraft or within the airport area.
View term烟雾演练
A practiced emergency procedure used by flight or cabin crew to respond to smoke or fire in the aircraft.
View term燃油不平衡
A condition in which there is a significant difference in the quantity of fuel between the left and right tanks, potentially affecting aircraft stability or flight performance.
View term燃油交叉供给
A procedure that allows fuel to be transferred from one tank to another, typically to correct a fuel imbalance or supply an engine when a tank is low.
View term燃油偏低状态
A condition where the fuel remaining is less than planned final reserve but not yet an emergency.
View term燃油紧急
A condition where an aircraft’s fuel state is such that without immediate landing, safe completion of flight is doubtful.
View term皮托管结冰
Ice formation in the pitot tube, which can obstruct accurate airspeed measurement, potentially leading to unreliable or erroneous cockpit indications.
View term直接控制律
A degraded flight control mode in fly-by-wire aircraft where control surfaces respond directly to pilot input without flight envelope protection.
View term空调组件跳脱
An automatic or commanded shutdown of an air conditioning pack due to overtemperature, overpressure, or system fault, impacting cabin environmental control.
View term空速不可靠
A condition where the airspeed readings provided by the pitot-static system are incorrect or inconsistent, potentially leading to hazardous flight control inputs.
View term紧急下降
A rapid descent initiated by flight crew in response to a pressurization failure, smoke, or other onboard emergency.
View term紧急定位信标
A portable beacon transmitting a distress signal for search and rescue, sometimes used interchangeably with ELT in aviation.
View term紧急定位发射器
A radio beacon automatically activated to transmit a distress signal, assisting search and rescue in locating an aircraft in distress.
View term紧急水上迫降
The controlled emergency landing of an aircraft on water.
View term自动体外除颤器
A portable device used to deliver an electric shock to restore normal heart rhythm during sudden cardiac arrest on board.
View term航空电子舱烟雾
Smoke detected in the avionics bay, indicating potential fire or overheating of electronic components, requiring immediate response and system isolation.
View term记忆操作步骤
A set of critical procedures that flight crew must perform from memory during certain emergencies without consulting checklists first.
View term货舱起火
A detected or suspected fire in the aircraft's cargo hold, requiring immediate fire suppression and emergency procedures.
View term起落架故障
A failure in the aircraft's landing gear system preventing proper extension or retraction.
View term起落架舱门开启
A situation where the landing gear doors remain open after gear extension or retraction, indicating a potential malfunction or aerodynamic hazard.
View term跑道偏离
An incident where an aircraft veers off or overruns the runway surface during take-off or landing.
View term跑道入侵
Any occurrence at an aerodrome involving the incorrect presence of an aircraft, vehicle, or person on the protected area of a surface designated for the landing and take-off of aircraft.
View term轮胎爆裂
A condition where an aircraft tyre bursts during taxi, take-off, or landing, possibly affecting braking or steering.
View term辅助动力装置起火
A fire involving the auxiliary power unit, typically located in the aircraft's tail, requiring immediate shutdown and fire suppression.
View term近地警告系统
An onboard system that alerts pilots if the aircraft is in immediate danger of flying into the ground or an obstacle.
View term逃生滑梯部署
The act of activating and extending the inflatable escape slide on an aircraft to facilitate emergency evacuation.
View term部分仪表飞行操作
Flight conducted with limited or failed cockpit instruments, typically requiring reliance on backup or standby indicators for basic attitude, navigation, or altitude references.
View term防冲撞姿势
A body position adopted by passengers and crew to minimize injury during an imminent impact or emergency landing, as per operator instructions.
View term防撞系统决策指令
An instruction issued by the aircraft's TCAS system to avoid potential collision with another aircraft, advising a vertical maneuver.
View term雷击
A direct or indirect electrical discharge from the atmosphere to an aircraft, potentially causing damage to avionics, surfaces, or structural systems.
View term静压孔堵塞
An obstruction in the static pressure port of an aircraft, leading to erroneous altitude, airspeed, and vertical speed indications, potentially affecting flight safety.
View term非指令方向舵输入
An unintentional or spontaneous rudder movement not initiated by the pilot, potentially affecting aircraft yaw stability and directional control.
View term非正常情况检查单
A predefined checklist used by pilots to address abnormal but not emergency situations.
View term非法干扰
An act of unlawful seizure, threat or attack against an aircraft, its passengers, crew or ground infrastructure that endangers aviation safety.
View term风切变脱离机动
A predefined and trained maneuver to escape from windshear conditions during takeoff or landing.
View term飞行中结冰
The buildup of ice on aircraft surfaces during flight due to supercooled water droplets freezing on contact, which can impair performance or control.
View term飞行控制卡滞
A condition in which the aircraft's primary or secondary flight control surfaces become unresponsive or stuck due to mechanical failure or obstruction.
View term鸟击
A collision between an aircraft and one or more birds, often occurring during takeoff or landing and potentially affecting flight safety.
View term