Airbus A320 – Hydraulic

{“questions”:{“6824e”:{“id”:”6824e”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The YELLOW hydraulic system has _____ pumps to provide pressure (not counting the PTU – Power Transfer Unit)”,”desc”:”A pump driven by engine 2 pressurizes the YELLOW system. An electric pump ca also pressurize the YELLOW system, which allows YELLOW hydraulics to be used on the ground when the engines are stopped. Flight crew can also…… Continue Reading →

Airbus A320 – Automatic Flight

{“questions”:{“wa78q”:{“id”:”wa78q”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The Flight Management part of the FMGC includes the following elements: \r\n\r\n\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“o184w”:{“id”:”o184w”,”image”:””,”imageId”:””,”title”:”Navigation, flight planning and A\/THR commands. “},”xresa”:{“id”:”xresa”,”image”:””,”imageId”:””,”title”:”Performance optimization, A\/THR and AP commands “},”xp6ml”:{“id”:”xp6ml”,”image”:””,”imageId”:””,”title”:”Navigation, flight planning, performance optimization and flight predictions “,”isCorrect”:”1″},”zwclv”:{“id”:”zwclv”,”image”:””,”imageId”:””,”title”:”AP and FD commands and flight envelope computation.”}}},”nloyu”:{“id”:”nloyu”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”How can the present position of the aircraft be initialized? \r\n\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“2qpnd”:{“id”:”2qpnd”,”image”:””,”imageId”:””,”title”:”Present position can be entered through the…… Continue Reading →

Boeing 787 – Fuel

{“questions”:{“8m7wv”:{“id”:”8m7wv”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”Fuel quantity is measured by sensors in each tank. Total fuel quantity is displayed on the secondary EICAS display. Tank quantities and total fuel quantity are displayed on the FUEL synoptic display.”,”desc”:”Fuel quantity is measured by sensors in each tank. Total fuel quantity is displayed on the primary EICAS display. Tank quantities and total fuel…… Continue Reading →

Airbus A320 – Air Systems

{“questions”:{“2mvqp”:{“id”:”2mvqp”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”Conditioned air is distributed to: “,”desc”:”The air conditioning system is fully automatic. It provides continuous air renewal and maintains a constant, selected temperature in the following 3 zones : COCKPIT, FWD CABIN, AFT CABIN. These three zones are independently controlled.”,”hint”:””,”answers”:{“jt9i1”:{“id”:”jt9i1″,”image”:””,”imageId”:””,”title”:”Cockpit, cargo bays and cabin. “},”c0zrf”:{“id”:”c0zrf”,”image”:””,”imageId”:””,”title”:”Cockpit, forward and aft cabins. “,”isCorrect”:”1″},”zxrr1″:{“id”:”zxrr1″,”image”:””,”imageId”:””,”title”:”Cockpit, avionics bay and cabin. “},”1tj6q”:{“id”:”1tj6q”,”image”:””,”imageId”:””,”title”:”Cockpit,…… Continue Reading →

Boeing B777 – Hydraulics

{“questions”:{“dpm03”:{“id”:”dpm03″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”How are the Center hydraulic system Primary pumps driven?\r\n\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“chchq”:{“id”:”chchq”,”image”:””,”imageId”:””,”title”:”Electrically only.”,”isCorrect”:”1″},”1opet”:{“id”:”1opet”,”image”:””,”imageId”:””,”title”:”Engine only.”},”5ha9j”:{“id”:”5ha9j”,”image”:””,”imageId”:””,”title”:”Air only.”},”1ps7q”:{“id”:”1ps7q”,”image”:””,”imageId”:””,”title”:”Electrically and air.”}}},”r7wu3″:{“id”:”r7wu3″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”How is the hydraulic normal fluid level indicated?\r\n\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“pzvpg”:{“id”:”pzvpg”,”image”:””,”imageId”:””,”title”:”The suffix RF indicating \”Reservoir Full\”.”},”wzk62″:{“id”:”wzk62″,”image”:””,”imageId”:””,”title”:”A white RF \”Reservoir Full\” in the Hydraulic synoptic page.”},”8bcfi”:{“id”:”8bcfi”,”image”:””,”imageId”:””,”title”:”A green line.”},”7dsp5″:{“id”:”7dsp5″,”image”:””,”imageId”:””,”title”:”1.00.”,”isCorrect”:”1″}}},”f850j”:{“id”:”f850j”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”When will a center hydraulic pump \”FAULT\” light be illuminated?\r\n”,”desc”:””,”hint”:””,”answers”:{“s9uyp”:{“id”:”s9uyp”,”image”:””,”imageId”:””,”title”:”When there is low demand pump output pressure, or the…… Continue Reading →

Boeing B777 – Anti Ice and Rain

{“questions”:{“zdsky”:{“id”:”zdsky”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”When can engine anti-ice be operated manually?\r\n\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“4r2mf”:{“id”:”4r2mf”,”image”:””,”imageId”:””,”title”:”Only on the ground.”},”hb1ia”:{“id”:”hb1ia”,”image”:””,”imageId”:””,”title”:”Only in the air.”},”mwami”:{“id”:”mwami”,”image”:””,”imageId”:””,”title”:”On the ground or in the air. “,”isCorrect”:”1″},”5rn57″:{“id”:”5rn57″,”image”:””,”imageId”:””,”title”:”Only when TAT is above 10 deg.C.”}}},”v66dr”:{“id”:”v66dr”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”What do the EAI symbols on EICAS indicate?\r\n\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“66rl7”:{“id”:”66rl7″,”image”:””,”imageId”:””,”title”:”Engine anti-ice is armed.”},”cs15o”:{“id”:”cs15o”,”image”:””,”imageId”:””,”title”:”Engine anti-ice is operating. “,”isCorrect”:”1″},”tqypp”:{“id”:”tqypp”,”image”:””,”imageId”:””,”title”:”Engine anti-ice has failed.”},”42ka5″:{“id”:”42ka5″,”image”:””,”imageId”:””,”title”:”Engine anti-ice should be turned off.”}}},”1rkf9″:{“id”:”1rkf9″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”What is the position of an engine anti-ice…… Continue Reading →

Boeing 737NG – Flight instruments

{“questions”:{“vr1xd”:{“id”:”vr1xd”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”To climb to FL280 in the shortest distance, MAX ANGLE should be selected on this page:”,”desc”:””,”hint”:””,”answers”:{“yrap8”:{“id”:”yrap8″,”image”:””,”imageId”:””,”title”:”CLB or CRZ”},”jgs3j”:{“id”:”jgs3j”,”image”:””,”imageId”:””,”title”:”PROG”},”edbi5″:{“id”:”edbi5″,”image”:””,”imageId”:””,”title”:”CLB”,”isCorrect”:”1″},”hyxum”:{“id”:”hyxum”,”image”:””,”imageId”:””,”title”:”CLB or PERF”}}},”wd6id”:{“id”:”wd6id”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”When penetrating turbulence:”,”desc”:””,”hint”:””,”answers”:{“13fkw”:{“id”:”13fkw”,”image”:””,”imageId”:””,”title”:”The Turbulence N1 is line selected to the scratch pad on the CRZ page and transferred to the N1 LIMIT page for activation & execution.”},”twdxz”:{“id”:”twdxz”,”image”:””,”imageId”:””,”title”:”The Turbulence N1 is activated on the CRZ page”},”odh5d”:{“id”:”odh5d”,”image”:””,”imageId”:””,”title”:”The Turbulence…… Continue Reading →

Boeing 737NG – Air Systems

{“questions”:{“0ubpz”:{“id”:”0ubpz”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”During preflight procedure the trim air switch is left in the OFF position and only one pack is selected ON for air conditioning. What is the consequence? “,”desc”:””,”hint”:””,”answers”:{“jr3kr”:{“id”:”jr3kr”,”image”:””,”imageId”:””,”title”:”Since the trim air is off both packs will average the temperature that satisfies the zone which requires the most cooling “},”twrkk”:{“id”:”twrkk”,”image”:””,”imageId”:””,”title”:”During single pack operation the zone temperature…… Continue Reading →

Boeing 737NG – Anti Ice and Rain

{“questions”:{“r5de4”:{“id”:”r5de4″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”Illumination of an amber COWL ANTI ICE light indicates:”,”desc”:””,”hint”:””,”answers”:{“jknxm”:{“id”:”jknxm”,”image”:””,”imageId”:””,”title”:”An overpressure condition.”,”isCorrect”:”1″},”6jqov”:{“id”:”6jqov”,”image”:””,”imageId”:””,”title”:”An overtemperature or overpressure condition.”},”837w6″:{“id”:”837w6″,”image”:””,”imageId”:””,”title”:”The respective cowl anti-ice valve is open.”},”eclbb”:{“id”:”eclbb”,”image”:””,”imageId”:””,”title”:”The respective cowl anti-ice valve is in transit, the cowl anti-ice vave position disagrees with the respective engine anti-ice switch position.”}}},”vrdzu”:{“id”:”vrdzu”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”Windshield wipers of are provided to maintain a clear area on the cockpit No.1 windows.…… Continue Reading →

Boeing 787 – Flight controls

{“questions”:{“507fu”:{“id”:”507fu”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-Primary-Flight-Computers.jpg”,”imageId”:”4439″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”Primary Flight Computers switch – What is the function of the DISC selection? “,”desc”:””,”hint”:””,”answers”:{“dm8v1”:{“id”:”dm8v1″,”image”:””,”imageId”:””,”title”:”To disconnect the primary flight computers (PFCs) from the flight control system and to put the flight control system in the direct mode.\r\n”,”isCorrect”:”1″},”w7fjr”:{“id”:”w7fjr”,”image”:””,”imageId”:””,”title”:”To disconnect all the primary flight computers (PFCs) and to put the flight control system in the normal mode.”},”8jxx9″:{“id”:”8jxx9″,”image”:””,”imageId”:””,”title”:”To disconnect…… Continue Reading →

Boeing 787 – Fire protection

{“questions”:{“4imsb”:{“id”:”4imsb”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-APU-Fire-Protection.jpg”,”imageId”:”4609″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”APU Bottle Discharge (APU BTL DISCH) Light \u2013 If illuminated amber:”,”desc”:””,”hint”:””,”answers”:{“263cu”:{“id”:”263cu”,”image”:””,”imageId”:””,”title”:”The extinguisher bottle is discharged or has low pressure.”,”isCorrect”:”1″},”i16hi”:{“id”:”i16hi”,”image”:””,”imageId”:””,”title”:”The extinguisher bottle is discharged.”},”rkhfn”:{“id”:”rkhfn”,”image”:””,”imageId”:””,”title”:”The extinguisher bottle is discharged or inoperative.”}}},”ovrwy”:{“id”:”ovrwy”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-APU.jpg”,”imageId”:”4257″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The APU automatically shuts down for a detected fire.”,”desc”:””,”hint”:””,”answers”:{“a38br”:{“id”:”a38br”,”image”:””,”imageId”:””,”title”:”True.”,”isCorrect”:”1″},”vzqql”:{“id”:”vzqql”,”image”:””,”imageId”:””,”title”:”False.”}}},”lh8xn”:{“id”:”lh8xn”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-Main-Gear-Wheel-Well-Ian-Abbott.jpg”,”imageId”:”4610″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The main gear wheel wells has two distinct fire detection and fire extinguishing systems.”,”desc”:””,”hint”:””,”answers”:{“0wqsu”:{“id”:”0wqsu”,”image”:””,”imageId”:””,”title”:”True.”},”an1e9″:{“id”:”an1e9″,”image”:””,”imageId”:””,”title”:”False.”,”isCorrect”:”1″}}},”mu90c”:{“id”:”mu90c”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-Engine-Fire-Protection.jpg”,”imageId”:”4611″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”There are multiple dual-channel detector assemblies…… Continue Reading →

Boeing 787 – Landing gear

{“questions”:{“b29h4”:{“id”:”b29h4″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-Landing-Gear-2.jpg”,”imageId”:”4272″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The Boeing 787 is equipped with a retractable landing gear that is:\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“lriya”:{“id”:”lriya”,”image”:””,”imageId”:””,”title”:”Electrically and hydraulically operated.”},”30jwj”:{“id”:”30jwj”,”image”:””,”imageId”:””,”title”:”Electrically operated.”},”yc7wg”:{“id”:”yc7wg”,”image”:””,”imageId”:””,”title”:”Hydraulically operated.”,”isCorrect”:”1″}}},”pej1i”:{“id”:”pej1i”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”What hydraulic system powers the landing gear?”,”desc”:””,”hint”:””,”answers”:{“m3dhz”:{“id”:”m3dhz”,”image”:””,”imageId”:””,”title”:”Left hydraulic system.”},”w1wc2″:{“id”:”w1wc2″,”image”:””,”imageId”:””,”title”:”Center Hydraulic system.”,”isCorrect”:”1″},”5g40j”:{“id”:”5g40j”,”image”:””,”imageId”:””,”title”:”Right hydraulic system”}}},”wyaaw”:{“id”:”wyaaw”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:”NextGenerationMechanic”,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-Landing-Gear.jpg”,”imageId”:”4273″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”When landing gear retraction is completed, the landing gear is held in place by:\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“yj2ve”:{“id”:”yj2ve”,”image”:””,”imageId”:””,”title”:”Hydraulic actuators.”},”xecqh”:{“id”:”xecqh”,”image”:””,”imageId”:””,”title”:”Uplocks.”,”isCorrect”:”1″},”ockg9″:{“id”:”ockg9″,”image”:””,”imageId”:””,”title”:”Automatic safety switches.”}}},”qo5yd”:{“id”:”qo5yd”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”After retraction, the EICAS landing gear position indication changes to UP…… Continue Reading →

Boeing 787 – APU

{“questions”:{“hcw42”:{“id”:”hcw42″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-APU4.jpg”,”imageId”:”4435″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”If an engine is shutdown during the APU start:”,”desc”:””,”hint”:””,”answers”:{“psrwy”:{“id”:”psrwy”,”image”:””,”imageId”:””,”title”:”The start will continue as normal.”},”pwr5c”:{“id”:”pwr5c”,”image”:””,”imageId”:””,”title”:”The start may be aborted due to a power interruption to the CMSC (Common Motor Start Controllers) performing the start.”,”isCorrect”:”1″},”rbrm6″:{“id”:”rbrm6″,”image”:””,”imageId”:””,”title”:”The start will be aborted.”}}},”n7110″:{“id”:”n7110″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:”https:\/\/www.smartcockpit.com\/wp-content\/uploads\/2024\/04\/B787-APU2.jpg”,”imageId”:”4258″,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The APU supplies electrical power which is available throughout the airplane operating envelope.”,”desc”:””,”hint”:””,”answers”:{“asoao”:{“id”:”asoao”,”image”:””,”imageId”:””,”title”:”True.”,”isCorrect”:”1″},”edx26″:{“id”:”edx26″,”image”:””,”imageId”:””,”title”:”False.”}}},”bakcf”:{“id”:”bakcf”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”If demand pumps are turned on during…… Continue Reading →

Boeing 787 – Hydraulics

{“questions”:{“kktps”:{“id”:”kktps”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”What is the nominal pressure of all three hydraulic systems?\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“8fwjh”:{“id”:”8fwjh”,”image”:””,”imageId”:””,”title”:”3000 psi.”},”0m7ll”:{“id”:”0m7ll”,”image”:””,”imageId”:””,”title”:”4000 psi.”},”ks8q8″:{“id”:”ks8q8″,”image”:””,”imageId”:””,”title”:”5000 psi.”,”isCorrect”:”1″}}},”ftjwb”:{“id”:”ftjwb”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The hydraulic systems power the:\r\n\r\n\r\n\r\n”,”desc”:””,”hint”:””,”answers”:{“t6ghb”:{“id”:”t6ghb”,”image”:””,”imageId”:””,”title”:”Flight controls, landing gear, leading edge slats, nose gear steering, thrust reversers and trailing edge flaps.”,”isCorrect”:”1″},”k1vl8″:{“id”:”k1vl8″,”image”:””,”imageId”:””,”title”:”Flight controls, landing gear, leading edge slats and nose gear steering.”},”ruzmf”:{“id”:”ruzmf”,”image”:””,”imageId”:””,”title”:”Flight controls, landing gear, leading edge slats, nose gear steering and trailing edge flaps.”}}},”wtfvh”:{“id”:”wtfvh”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”Hydraulic…… Continue Reading →

Boeing 787 – Electrical

{“questions”:{“5vmkg”:{“id”:”5vmkg”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”The B787 electrical system primarily uses 115 Vac and 28 Vdc power, with a limited number of systems optimized with 235 Vac.”,”desc”:””,”hint”:””,”answers”:{“2j5mq”:{“id”:”2j5mq”,”image”:””,”imageId”:””,”title”:”True.”,”isCorrect”:”1″},”bld9b”:{“id”:”bld9b”,”image”:””,”imageId”:””,”title”:”False.”}}},”m5cg1″:{“id”:”m5cg1″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:”Amongst the different sources of electrical power, the B787 uses:”,”desc”:”The other electrical system power sources are three external AC power receptacles, one Ram Air Turbine (RAT), one main battery, one APU battery, three flight…… Continue Reading →