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B-747 Question Bank & Review
When are Master WARNING lights and Bell for New EICAS warning messages FIRE inhibited during takeoff? - โ โ V End of Oral Exam Review Guide - โ โ What is displayed on primary EICAS when the nacelle anti - ice and / or the wing anti - ice valve is open - โ โ NAI for nacelle anti ice WAI for wing anti ice Is wing anti - ice effective with the leading edge. Flaps extended - โ โ No, wing anti-ice is ineffective when the LEF are not retracted How many pitot - static probes are provided, and when are they heated
- โ โ 4 pitot - static probes
Electrically heated when any engine is operating Can you operate the wing anti - ice system on the ground - โ โ No, on the ground, WAI system is inhibited B-747 Oral Question Bank Review Air Systems - โ โ When does the equipment cooling system configure for flight - โ โ One or more engines on each wing is operating When is warm equipment cooling air ducted overboard on the ground - โ โ Engines not operating
Equipment cooling selector in NORM
Ambient temperature moderate or high Equipment cooling provides cooling air for what compartment and systems - โ โ Flight deck equipment
Electrical and equipment racks (E & E bay) How can you manually configure the equipment cooling system for flight - โ โ Positioning the Equipment Cooling Selector to STBY What is the function of the Lower Love Cargo Conditioned Air Flow Rate Selector (LLCCAFR) - โ โ Provides forward and aft lobe cargo air conditioning. What happens if a pack temperature controller (PTC) detects a fault in a pack channel - โ โ Control of the respective pack switches to the other PTC How many pack temperature controllers (PTC) are provided - โ โ Two - A and B When in the descent mode, will the cabin altitude controllers program a positive or a negative pressurization at touchdown - โ โ Small positive pressurization at touchdown What action would allow manual operation of the pressurization system - โ โ Turn both Outflow Manual switches to ON
What does the EEC use as the controlling parameter for the GE engines
- โ โ N What protection features are provided in the EEC Normal mode - โ โ Thrust limiting
Maintains constant thrust
Over-speed protection What occurs in the auto-throttle system when any EEC control is switched to alternate mode - โ โ The auto-throttles disconnect, but can be.reconnected when all EEC's have been switched to alternate mode What EEC normal mode protection feature is not available in EEC Alternate mode - โ โ Thrust limiting at maximum N
(Maximum thrust can be achieved prior to thrust lever position at full forward) When does the EEC select approach idle - โ โ Flaps in a landing position
Continuous ignition switch is ON
During thrust reverser operation What action should be taken prior to manual selection of EEC alternate mode - โ โ Decrease thrust lever position
(Thrust does not change when the EEC auto transfers control from normal mode to alternate mode) What happens when you turn the Continuous (CON) IGNITION Switch ON - โ โ Selected igniters operate continuously
Commands approach idle minimum What two engine indications are displayed full time on the primary EICAS - โ โ N1 & EGT What color does the EGT change to if the EGT start or takeoff limit is reached - โ โ Red If the airborne vibration monitoring system cannot determine the source of the vibration (FAN, LPT, NT) it will display "BB". What does this mean? - โ โ Broadband (Broadband vibration is the average vibration detected) What 3 items will the auto start protect from during and engine start that also will result in an ENG 1,2,3,4 AUTOSTART (Amber) EICAS message - โ โ Hot start Hung start
How long should you wait before turning the battery switch OFF after the APU selector is rotated to OFF and why - โ โ 2 minutes
Allows a complete shutdown sequence, with fire detection capability B-747 Oral Question Bank Review - Electrical - โ โ What is the function of the Standby Power Switch in the Auto Position - โ โ Allows the main and APU standby busses to be powered from available sources What does the "AVAIL" light indicate on the Extrnal and APU PWR switches - โ โ The related power source (APU or EXT) is plugged in and available and the power quality is acceptable When is the main cargo deck handling bus powered - โ โ When the "AVAIL" light is displayed on the APU 2 or EXT 2 switches What electrical power source provides power for the lower lobe cargo handing, fueling panel, and AUX 4 hydraulic pum - โ โ EXT PWR 1 or APU GEN 1 is AVAIL or slelected ON (Powering the Ground Handling Bus) What are some of the equipment items powered by the Utility busses - โ โ 5 fuel pumps
Galley equipment
What happens when you push a Generator Drive Disconnect (DRIVE DISC) switch - โ โ Disconnects IDG from engine when above idle speed
Opens related Generator Control Breaker (GCB) What condition would automatically disconnect the IDG if not manually disconnected by the flight crew - โ โ Excessively high drive oil temperature What does a Bus Isolation (ISLN) light illuminated indicate - โ โ BTB open
AC bus isolated from Synchronous Bus How do you reconnect an IDG that has been disconnected - โ โ Maintenance action is required
The IDG cannot be restored by flight crew action (FCOM, VOL 2; 6.20.2) How is the electrical system configured during an automatic ILS approach (autoland)? - โ โ AC and DC busses 1,2, and 3 are isolated from the sync bus
AC bus 4 continues to power the synchronous bus
Demand pumps operate when related engine pump output pressure is low, or when related fuel control switch is in CUTOFF
Demand pumps 1 & 4 also operate when flaps are in transit on the ground, or flaps extended past 1 in flight Which demand pumps are air driven, and which ones are electric motor driven - โ โ Systems 1 and 4 are air driven pumps
Systems 2 and 3 are electric driven pumps What does a magenta "RF" displayed next to a hydraulic quantity indicator on the secondary EICAS mean - โ โ The reservoir requires refill (Only displays on ground) What is the purpose of the auxiliary pump - โ โ Used for ground handling operations When is the engine driven hydraulic pump pressurized - โ โ The engine is running
The engine pump switch is ON What does a hydraulic reservoir quantity indication of ).95 mean as displayed on the secondary EICAS display - โ โ 95% of normal service level
(95% full) What degraded or inoperative systems can you expect from a loss of hydraulic system 1 - โ โ QRH 13. Center Autopilot inop Left outboard eleveator inop Inboard trailing edge flap hydraulic operation inop Nose and body gear hydraulic extension and retraction inop NOse and body gear steering inop System 1 alternate brake sourc inop What degraded or inoperative systems can you expect from a loss of hydraulic system 4 - โ โ QRH 13. Right outboard elevator inop Outboard trailing edge flap hydraulic operation inop Two inboard spoiler panels on each wing inop Wing gear hydraulic extension and retraction inop System 4 normal brake source inop Auto brake inop B-747 Oral Question Bank Review - Fire Protection and Detection - โ โ How many engine fire extinguishers are provided - โ โ 2 on each wing (4 total)
Located in the right body gear well is the APU Ground Control Fire Protection Panel. This panel has an APU stop switch, and APU Extinguisher Discharge Switch. Is there smoke detection provided for the Crew Rest areas - โ โ Yes
Smoke detectors are installed in the crew rest areas, and an aural warning sounds in the crew rest compartment when smoke is detected in that compartment What happens when you push the CARGO FIRE Depressurization Switch with the MAIN deck fire switch ARMED - โ โ Initiates airplane depressurization
- Enables main deck fire suppression
- Turns off 2 packs
- Configures equipment cooling to closed loop and turns off all airflow to main deck and airflow and heat into lower cargo compartments
- Classes master trim air valve What unlocks an engine fire switch - โ โ 1. Fire warning
- FUEL CONTROL switch is in CUTOFF
- Pushing the fire override switch
Is the engine fire / overheat detection system a single loop or dual loop system - โ โ Dual loop
A dual loop fire detector in installed in each engine nacelle. In addition, each engine has a dual loop overheat detector. In normal operation, both loops in a detector must detect a fire or overheat condition to cause an engine fire warning or overheat caution unless configured for single loop operation. B-747 Oral Question Bank Review - Fuel System - โ โ How is Center Wing Tank Fuel scavenged - โ โ CWT fuel is scavenged by 4 jet pumps pumping into main tanks 2 and 3
Scavenge begins when main tank 2 or 3 fuel quantity decreases to approximately 27,200 kgs Which cross feed valves are controlled by system logic when setting T/O flaps - โ โ Crossfeed valves 2 and 3 When should you turn the Center Wing Tank pumps on during the Before Start Procedure - โ โ 7700 kgs or more in center wing tank Main tank 2 and 3 override / jettison pumps can operate to a standpipe level of approximately ___________ kgs of fuel remaining in each tank - โ โ 3,200 kgs Describe how the fuel quantity indication changes upon termination of fuel jettison - โ โ The fuel to remain quantity indication changes from magenta to white.
When does the fuel temperature display amber on primary EICAS display - โ โ -37 C In general, how would you handle an excessive fuel imbalance - โ โ QRH
By opening or closing cross feed valves and turning off and on fuel pump switches (QRH supplementary procedures) B-747 Oral Question Bank Review Anti-Ice / Window Heat - โ โ Describe what happens when nacelle anti-ice is commanded on - โ โ NAI valve opens Selected engine igniters operate continuously Does the Nacelle Anti Ice AUTO function work on the ground? - โ โ No -The auto function only works in flight How many ice detection probes are there, and where are they located - โ โ 2 probes are located on the forward fuselage How many angle of attack probes are provided, and when are they heated - โ โ 2 angle of attack probes
Electrically heated when any engine is operating.
What windows are heated by the window heat switches - โ โ Forward left and right windshields only Why is it necessary to pressurize hydraulic system 4 before pressurizing the other systems. - โ โ Precludes the transfer of hydraulic fluid from system 1 or 2 into system 4. When the parking brake is set, and then released, brake hydraulic return lines dump into system 4. B- Oral Question Bank & Review Warning Systems - โ โ What are the 3 priority levels of alert messages? - โ โ -Warning -Caution -Advisory What is the highest priority alert message? - โ โ Warning messages (red) What are the 4 types of EICAS messages - โ โ -Warning Messages -Caution Messages -Advisory Messages -Memo Messages What RED alert displays are shown or displayed on the PFD? - โ โ - WINDSHEAR -PULL UP
**With any of the below conditions -Any thrust lever is closed and the RA is less than 800 feet -Flaps in a landing position (25 or more) When are master CAUTION lights and Beeper inhibited during takeoff? - โ โ 80 knots airspeed New Predictive Windshear Warnings are inhibited at what airspeed during takeoff? - โ โ 100 knots airspeed What does the Zone System (SYS) Fault Light indicate - โ โ - Temperature zone duct overheat or zone temperature controller fault has occurred -Master trim air valve failed closed -Master trim air valve closed and pack air continues to flow Under what conditions would High Pressure (HP) air be used - โ โ - Descent -Other low power setting operations How would you isolate a bleed air duct section in the event of a bleed duct leak is detected - โ โ Close the respective isolation valve
Close the engine bleed air valves What does a bleed duct isolation (ISLN) Valve light indicate - โ โ Isolation valve position disagrees with switch position
The Engine Bleed Air Switches control which valves by system logic, when bleed air pressure is available - โ โ PRV HP Bleed Valve Engine Bleed Air Valve Describe the general function of the pressure regulation valve (PRV) - โ โ Prevents damage to ducting and equipment downstream by limiting bleed air pressure Under what conditions would Intermediate Pressure (IP) air be used - โ โ High power setting operations With a right duct isolated, how will this affect the hydraulic systems - โ โ The hydraulic demand pump 4 is turned off
No hydraulic system 3 and 4 reservoir pressure With the EICAS message STARTER CUTOUT 1,2,3,4 shown, will Nacelle Ant-ice be available for the related engine? - โ โ No With a right duct isolated, how will the affected leading edge flaps extend - โ โ The right wing LEF operate electrically in the secondary mode
-Expect EICAS message FLAPS PRIMARY B-747 Oral Question Bank Review Auto Flight & Flight Instruments - โ โ
