BOEING 767

What is the function of the Power Transfer Unit (PTU) between the left and right hydraulic systems?. Transfers hydraulic fluid from the left reservoir in to the center system. Supplies a third source of hydraulic power to the horizontal stabilizer. Provides emergency hydraulic power to operate the landing gear.

what is the purpose of the automatic center tank scavenge system?. Increases the vent airflow to reduce tank pressure. Transfers remaining center tank fuel to the main tanks. Drains excess fuel directly overboard during refuel.

Under MAP mode, what condition will cause the MAP failure flag to show on the ND?. Aircraft bank angle exceeds 25 degrees for more than 10 seconds. FMC map background or latitude and longitude is missing for more than 35 seconds. ADIRU sends inconsistent pitch and roll data to the display computer.

What does the ¨PITCH¨ flag on the PFD indicate?. 3 degrees pitch feedback difference between FCC and IRU. 3 degrees pitch difference between captain and F/O. An autopilot pitch command disagreement over 3 degrees.

Why does each LFDS LRU connect to the DPC at a specific left/centre/right node?. Improve Ethernet bus shlelding from HF nolse in the cabin stucture. Balance current loads between the three DPCS so power sharing stays equal. ldentify which DPC Is recelving data so the system knows the source.

Why does a WARNING level system fault bypass the DPC logic circult?. Prevents those warnings from being stored Iinside the DPC message memory. Ensures the message goes directly to the alert list on the EICAS primary display. Stops those warnings from belng delayed by DPC Inhibit timing before display.

What type of light source ls used for the wing anticolllsion stobe?. High-output LED emitter module. High-intensity xenon stobe unit. Halogen high temperature lamp assembly.

When a cabin attendant dials the flght deek ueinu the enhin merelinn neewae cockpit indication confirms the call. Pink call light illuminates at the pilots call panel and a low chime sounds. Blue location indicator Illuminates at the pilots call panel and a high chime. Amber fault annunciation illuminates at the pilots call panel and no chime.

Where are the HF transceivers located. Forward equipment center. Aft equipment center. Main equipment center.

What is the highest priority time source used by the FMC' s?. UTC from the onside MMR. Time from the onside clock. UTC from the offside MMR.

What makes an ALERT call different from normal attendant call in the cabin?. All pink attendant lights flash at one-second intervals and the hi-lo chime repeats three times. All pink lights only remain steady with no flashing and a single hi-lo chime sounds once. Only a single short chime sound is made once and all lights stay steady illuminated.

Where can the horizontal stabilizer position indicator be found?. One each on P1 panel and on P2 panel. At the EICAS primiry engine display. On each side of the P10 control stand.

If flap load relief fails, what indication will the crew see?. "FLAP LOAD RELIEF" message displayed adjacent to the flap indicator. "FLAP LOAD RELIEF" level C message displayed on EICAS. "FLAP CONFIGURATION" caution message displayed on EICAS.

What inputs do the YSMs use to control the outboard aileron lockout actuators?. Control wheel roll commands signals from both FCCS. Lateral spoiler scheduting data comina from the spoiler control modules. Speed and Mach inputs coming from the three ADIRUS.

The 767-400 fuselage streteh added approximately 13 new frame stations, How Were these stations distribute along the fuselage. 6 forward and 7 aft. 19 forward with none aft. 10 forward and 3 aft.

After all landing gear Is UP and the deorare clesed, what is the purpose of the AUTO OFP function?. Removes electrical power from the UP solenoids to move selector valves to OFF. Energizes the DOWN solenoids to keep the bypassvalves partiolly pressurized. Sends continuous UP pressure to maintain maximum retraction pressure.

What is the function of the transfer cylinder during main landiny gear extenslon?. Keeps constant retraction pressure applied after the gear is fully down locked. Lifts the gear weight off the main gear doors untl the door latch unlocks. Prevents the door latch from unlocking until the gear reaches full extension position.

During normal operation. which torque motor controls the servo pressure to the open side of the actuator?. CTC torque motor. Cabin vent system. ASCTU torque motor.

Which unit acts as the backup receiver of the delta-P signals coming from the pack fiow sensor?. FCV. CTC. ASCTU.

What is the function of the turbine bypass valve in the air conditioning pack?. Limits the ram airflow amount passing through the compressor discharge. Regulates the condenser inlet temperature at the primary turbine stage. Adjusts the pack temperature output based on mixed manifold sensing.

When the lower cargo smoke detection system is in normal (AND) logic, what is re to trigger a fire signal?. Both detectors of one detector set must detect smoke before a fire signal is sent. Only the forward detector needs to sense smoke, because the aft is used of OR logic. Any single detector in either compartment detecting smoke will immediately trigger.

What is acorrect characteristic of the yaw damper operation?. The yaw damper reguires flight crew pedal Input to create yaw dampening commands. The yaw damper uses direct pedal position feedback to calculate the corrective rudder action. There is no rudder pedal feedback resultina from vaw damper rudder actuator movement.

Under which condition does "NO AUTOLAND" show on the PED autoland status?. The autoland system is in dual channel and above 1500 feet AGL. The autoland svstem is not available, or if multi-channelis not engaged below 600 feet AGL. Two autoland channel is downgraded but the remaining channel still operates normally.

When selecting the ground service power source which supply has priority if more than one source is available?. Primary external power. APU generator power. Right main AC bus.

Which unit provides protective functions for the external power system?. GCU. IDG. BPCU.

Where is the Mid Equipment Centre located?. Mid section of the aircraft belly. Aft of the FWD cargo compartment door. Aft of the nose wheel well below flight deck.

When would ATT mode be used and what does it still provide?. Air data fails but IRS works, gives only basic altitude. IRU nav fails but attitude works, gives pitch and roll. CDU fails but ADR works, gives only computed heading.

When does pressing the G/S INHB light/switch actually cancel the mode 5 annunciations?. After mode 5 begins. Before mode 5 begins. During normal cruise only.

Which input is used by the ADIRUs to compensate the altitude calculation for atmospheric pressure variation?. Barometric correction signals from the EFIS control panel feed the ADIRUS. Radio altimeter heiaht information is used to compensate the barometric altitude. GPS satellite signal strength variation is used to compensate the altitude variation.

When will MACH be displayed on the PFD?. Whenever barometric altitude is selected in hPa mode. When the airspeed tape is scrolling upward more than 20 kts per second. When indicated airspeed is approximately above 0.40 MACH.

Which system uses G/S deviation specifically to generate aural glideslope annunciations?. Display processor using ND deviation. GPWs computer using left ILS. AFDS using centre ILS data.

What is the purpose of the differential pressure sensor in the pitot-static system. Supplies backup air data to the captain's standby flight instruments. Converts pitot and static pressure difference into cabin differential pressure information. Prevents RAT deployment when airspeed drops bellow stall protection logic.