Ex. 142. Explain these terms.

e.g. Power transfer unit – is used to supply the additional volume of hydraulic fluid needed to operate the autoslats and leading edge flaps and slats at the normal rate when system B engine-driven hydraulic pump volume is lost.

Fluid reservoir, pump output pressure, lubrication, to power flight controls, pressure switch, hydraulic leak, hydraulic system manual operation.

Ex. 143. Describe the hydraulic system operation. Stick to the plan.

1.Hydraulic power distribution: flight controls, leading edge slats, trailing edge flaps, landing gear, wheel brakes, nose wheel steering, thrust reversers, autopilot.

2.Hydraulics system components.

3.Hydraulics indications.

4.Hydraulic leak.

5.Standby hydraulic system.

FINAL TEST

1. Read these words and word combinations.

1.Specific, procedure, maintenance, primary, personnel, process, positioning, moving, deck, angle, communication, essential, operator, injured, majority, reduce, accomplished, hydraulic, pressurized, steering, ensure, brake, equipment, obtain, clearance, edge, complete, observe, hazard, diagram, location, available, conduct, efficient, readily, technique, similar, beyond, centerline, initiate, approach, approximately, displacement, completion, gradually, path, surface, reference, maneuver.

2.Takeoff procedure, noise abatement procedure, map display, workload, airplane performance, airspeed restrictions, flap retraction, inadvertent, mode control panel, access, to simplify, thrust settings, thrust, thrust management, route, route

modification, jet engine blast, paved surface, damage, foreign objects, autothrottle, lift off, rolling takeoff, tailwind, crosswind, brakes, takeoff roll distance, engine surge / stall, to align the aircraft with the RW centerline, thrust levers, to advance throttles, to retard throttles, idle power, go around, malfunction, failure, caution, rudder, rudder pedal, inoperative rudder pedal, within the limits, tolerance, adjustment, to verify, crew actions, thrust limit, symmetrical thrust, asymmetry, to exceed, maximum available thrust, stall, stall speed, control column, to initiate a smooth rotation at VR, stabilizer, stabilizer trim, phase of flight, velocity, rejected takeoff, continued takeoff, airspeed bugs, to disengage, definition / to define, to announce / annunciator, abnormality engine fire, engine failure, fault, subsequent, responsibility of the captain, due to, brake cooling, attempt, accuracy, briefing.

3.Angle, appropriate, attitude, constraint, subsequent, quantity, height, inoperative, knot, initial, path, conjunction, gain, airborne, reserve, preferable, accumulation, selectable, pitch, maneuvering, attitude, attitude indicator, pitch, indicated airspeed, flight instruments, vertical path, to cross-check, altitude gain / loss, excessive, acceleration, positive rate of climb, altimeter, to retract / to extend, to become airborne, trip fuel, fuel reserve, fuel quantity, fuel tank, fuel pump, high / low pressure, climb gradient, bank angle, to override, obstacle clearance height / altitude (OCH / OCA), to intercept, to capture, navaids, Mach / airspeed indicator, waypoint, one engine out, controllability.

4.Automatically, compute, hinge, engage, store, stored, database, maneuvering, restrictions, climb, constraints, selectable, economy, related, angle, cruise, value, function, predicted, deviation, cost, similar, cause, expected, windshield, antiicing, exist, anticipate, overtemperature, schedule, index, influenced, weight, exceed, excessive, additional, reduced, compliance, alerting, satisfied, ensure, to specify – specified, to qualify – qualified, to simplify – simplified, to modify – modified, to certify – certified, to identify – identified, to accompany – accompanied, to comply – compliance, to notify – notice, to verify – verification, to validate – validation, to select – selection / selector, to prove – proof, to enter –

entry, to engage – engagement, to guarantee – guarantee, to satisfy – satisfaction, pitot, constraints, tolerance, uniform, switches, changes, access, pressurized, margin, tendency, obtain, command, maneuvering, stall, technical, parameters, momentarily, technique, Mach, to deteriorate, cruise, cruising, achievable, buffet, length, segment, approximately.

5.Guidance, determined, certified, certification, structural, load, fuselage, pressurization, sufficient, available, rating, capability, accomplish, minor, buffet, onset, relatively, amber, tape, guarantee, decelerating, band, portion, familiar, current, input, at least, turbulence, activate, approximately, acceptable, projected, default, variable, schedule, unique, technique, cruise, drag, load, payload, maneuver, margin, speed tape, FMC, decelerate, level flight, to maintain speed, to exceed, available thrust, required thrust, weight, flight crew, performance, cruise CG, bank angle, to update, loss, gain, value, service life, to result in, to lead to, maximum continuous power, stick shaker, to activate, to provide, to determine, to accept, acceptable, step climb, to consume fuel, inoperative engine, stability, proximity, trim system, to notify ATC, operative, serviceable, serviceability, failure, malfunction, amount, to override, to level off, altitude capture, autopilot pitch commands, flaps-up speed, trend, to encounter, to disregard, ambient, to be aware of, a sharp turn, clearance, clearance compliance.

6.Schedule, mandatory, forecast, constraint, available, partial, steep, require, requirement, capture, descent speed schedule, airport transition altitude, the DES page target speed line, ATC speed change requirements, altitude window, vertical path segments, deceleration requirements, altitude capture, overspeed condition, flaps up maneuvering speed, speed adjustment, engine icing, engine anti-ice system, engine stall, navigation data base, descent path, an FMC path descent, transition altitude, wind value, an arrival procedure, mandatory altitude restrictions, speedbrakes, to receive clearance, rate of descent, autothrottle, level flight, flaps, to extend / retract flaps, downwind leg, outbound, approach fix, ATC

clearance, visual approach, terminal area, holding airspeed, clean configuration, clean speed, holding pattern.

7.Visual, profile, configuration, basis, requirements, judgment, accurate, procedure, tune, verify, beacon, glide slope, identifier, confirm, published, alternate, certificated, criteria, confine, recommended operating practices, flight profile, air traffic separation requirements, good descent planning, waypoint sequence, last minute traffic changes or constraints, enroute navigation procedure, published approach inbound course, radio navigation aid facilities, alternate course, missed approach point determination, communication frequency, minimum safe altitude sectors, maximum certificated landing weight, sink rate, landing configuration, reported meteorological visibility, approach, instrument approach, go-around, missed approach maneuver, circling, visual approach, conflicting traffic, separation, radar vectors, waypoint, altitude restrictions, altimeters, to crosscheck, decision height, initial / final approach fix, to tune, to verify, flight deck, alternate course, chart, validity, briefing, checklist, sink, disagreement, ceiling.

8.Threshold, angle, landing gear, target, previous, least, automatic, available, judging, techniques, applicable, appropriate, abrupt, windshear, collision, smoothly, retard, idle, simultaneously, abrupt, diagrams, attempt, shallow, illustrate, actuate, neutral, extension, antiskid, structural, contaminated, threshold height, glide path angle, landing gear touchdown, pilot eye level, safe threshold clearance, terrain clearance, flare initiation height, one engine inoperative landing, crosswind landing, abrupt control input, collision avoidance situation, pitch attitude, pitch attitude adjustment, a smooth thrust reduction, flare distance, flare time range, bounced landing, bounced landing recovery, automatic speedbrake deployment, a rejected landing maneuver, proper airspeed control, glide path, landing gear, final approach, radio altimeter, flare, stabilized approach, pitch, attitude, shift, windshear, descent rate, idle power, to retard / to advance throttles, gust, to trim, tailstrike, range, bouncing, go-around, to retract landing gear, speedbrake, lift, landing roll, deceleration, skid.

2. Translate these word combinations.

1.To develop procedures; to present serious hazards to ground personnel; to be tailored for specific operations; proper training; to position and connect the tug and tow-bar; to move the airplane; to disconnect the tow-bar; proper training of both pilots and ground maintenance; headset operator; a person usually injured or killed in the majority of accidents; to accomplish pushback with all hydraulic system pressurized and nose wheel steering locked out; to be on headset; to communicate any possible safety hazards to the flight crew; to accomplish engine start; to delay engine start; to start taxiing only after the marshaller clears the aircraft to taxi., an airport diagram; to require more than idle thrust; to be aware of buildings or other objects in the area being swept by jet blast during the turn; pilot uncertainty of the RW and / or TW pavement edge locations and related safety margins; potential foreign object damage; to position oneself to avoid the hazard; to tow the airplane to the desired location; to maneuver to keep the engine nacelles over the prepared surfaces; to cause skidding of the nose gear during turn; to reduce the turning radius; to place the main gear approximately on the RW centerline; to align the plane with the new direction of taxi; to release brakes; to add thrust, to result in a low speed turn; to impose undue stress on the landing gear; appropriate checklists; specific operation; safe and efficient taxi; possible safety hazards; readily available location; narrow taxi surface; relevant information, outboard side; potential damage; asymmetric thrust; light intermittent braking; slippery surface; standing water; periodic run-ups; to provide the best maneuver capability; to meet obstacle clearance requirements; RW edge, CG, ILS.

2.To satisfy typical noise abatement procedure requirements; to require modification of takeoff profile; to remove from the airspeed display; to have immediate access to sth; to modify CLM page; to monitor engine parameters; to relieve the crew from monitoring engine parameters; to obtain proper thrust; to cause structural damage; to follow F/D commands; flight tests prove that; to enter the runway; to maintain normal taxi speed; to align with the RW centerline; to

release the nose wheel steering wheel; to apply takeoff thrust; to provide uniform engine acceleration; to adversely affect takeoff distance; to reject takeoff; early recognition of a malfunction; to set thrust; to respond quickly to a rejected takeoff condition; to be covered by protective covers; to make a sound go/stop decision; a subsequent system fault; to cause unwanted thrust lever movement; to disconnect autothrottle; to set the thrust manually; to initiate a smooth rotation at VR; to achieve liftoff attitude; in conjunction with; to use visual cues; to keep the wings level during liftoff; airplane exposure to gusty conditions during rotation, liftoff and initial climb; to be proportional to the square of the airplane velocity; unusual vibrations or tire failure; to stop beyond the end of the RW; assurance that the brakes have capacity to stop the airplane; to set the airspeed bugs; to miss FMC alerting messages; before attempting a subsequent takeoff, to achieve the required height above the takeoff surface.

3. To use attitude indicator as primary pitch reference; in conjunction with other flight instruments; to maintain proper vertical path; to engage pitch mode; to result in altitude gain; to stop acceleration; take off profile; to crosscheck IAS for proper initial climb speed; to indicate low pressure; to maintain nose-up body angle required for a safe climb gradient; fuel pump low pressure light; the possibility of engine failure; preferable to a takeoff weight reduction to ensure all obstacles are cleared; to select LNAV; necessary to use HDG SEL mode at 400 ft AGL; to preset the desired heading before takeoff; departure procedure; a part of the active flight plan; to use the FIX page feature; to prevent unwanted changes from the desired flight path during autopilot engagement; to reach the existing flap position; speed tape; the difference between normal and engine out profile; the best indicator of the correct rudder pedal input; to counter the thrust asymmetry due to engine failure; the rapid onset of the yaw; excessive aileron trim; to cause spoilers to be raised; to keep the wings level; to adjust pitch attitude; the rate of rotation with an engine inoperative; to accomplish the appropriate checklist recall, ground track consistent with desired flight path; economy climb speed schedule; to obtain minimum operating cost; cost savings.

4.Bank angle; obstacle clearance; thrust reduction; pitch attitude; desired flight path; autopilot engagement; acceleration height; landing gear lever; low cruise altitude; normal economy climb speed schedule; waypoint restriction; cost saving; the entered cruise altitude; top of climb wind; climb temperature deviation from ISA; fuel pump low pressure lights; a nose-up body attitude; noise abatement procedure; one engine out controllability; altitude-related speed restrictions; flapsup maneuvering speed; altitude selection, single engine cruise speed; nose-down trim change; engine failure; engine damage; thrust limited altitude.

5.Maximum altitude determined by three characteristics; to limit the ability to do sth; to guarantee the ability to maintain level flight at that speed; to decelerate the plane; limited by available thrust; to be familiar with performance characteristics of the airplane in these conditions; the most accurate limits; prior to buffet; when operating at or near maximum altitude; to activate the stick-shaker; to reduce the margin to buffet onset; to reduce load factor; to select long range cruise mode; short trip distance; to request / accept initial cruise altitude; the fuel consumed during flight; to achieve the flight plan fuel burn; to enter an appropriate step climb value in the FMC; zero wind maximum range cruise airspeed; to notify ATC; to disconnect autothrottle; to exhibit excellent stability throughout the high altitude; to encounter Mach buffet; to use manual thrust adjustments; to select CO thrust in FMC; to set engine out altitude and airspeed on MCP; to slow to ENG OUT speed; to maintain engine out cruise speed; to accelerate to MMO in level flight; at normal cruising altitudes; FMC fuel prediction; thrust limited maneuver margin; manual thrust adjustment; single engine cruise speed; specific minimum rate of climb; a real-time bank angle limiting function; automatically selected climb thrust limit; low altitude climb restriction; a low altitude level-off.

6.To accommodate waypoint speed / altitude constraints; to generate a descent guidance path; IAS values on the DES page; to approach idle below the anti-ice altitude; to reflect descent wind values entered on the DESCENT FORECAST page; to select an arrival procedure; the path based on the descent speed schedule,

any entered speed / altitude constraints and forecast use of anti-ice; to enter in the route; to change airplane pitch, to set the next altitude; to receive further clearance, to require the use of speedbrakes for speed control; before entering downwind, to select flaps 5 prior to the approach fix going outbound, to lower landing gear; speed restrictions below specific altitudes; in the vicinity of the airfield; to exceed the limits; other speed assigned by ATC; to maintain the speed within plus or minus 10 knots; whenever icing conditions exist or are anticipated; failure to follow the recommended procedure; to achieve proper inbound leg timing; to adjust timing for subsequent outbound legs, to remain in holding, when unable to comply with the speeds in the tables.

7.To provide a basis for crew coordination; not intended to replace good judgment and logic; to have certain basic factors in common; a key to a safe, unhurried, professional approach; careful review of the approach procedure; to ensure the waypoint sequence on a LEGS page; the appropriate use of the MCP heading; to update waypoint sequence; to complete approach preparation; to crosscheck radio and pressure altimeters; to consider alternate courses of actions; to tune the radio; to remain within lateral confines of the runway edges extended; lateral displacement from the RW centerline.

8.To assure safe threshold clearance; to assist the pilot in judging terrain clearance; to begin with a stabilized approach on speed, in trim and on glide path; to shift visual sighting; to maintain constant airspeed and descent rate; to determine the flare point; to slow the rate of descent; to assist in controlling the natural pitch-down change associated with thrust reduction; to hold sufficient back pressure on the control column to keep the pitch attitude constant; plus any gust correction; to increase the tailstrike possibility; to lead to a tail strike; to avoid rapid control movements during the flare; not to allow the airplane to float; not to attempt to hold the nose wheels off the RW; to re-establish a normal landing attitude; to initiate a go-around; to add thrust; to result in a loss of lift.

3. Think of synonyms.

Essential – . . . . . . . . . . / . . . . . . . . . . / . . . . . . . . . .; to connect – . . . . . . . . . .; flight deck – . . . . . . . . . .; in the vicinity of – . . . . . . . . . . / . . . . . . . . . .; to reduce –

. . . . . . . . . .; to accomplish – . . . . . . . . . .; to make sure – . . . . . . . . . .; to obtain –

. . . . . . . . . .; to complete – . . . . . . . . . .; to clear – . . . . . . . . . .; to initiate – . . . . . . . . . /

. . . . . . . . .; completion – . . . . . . . . . . / . . . . . . . . .; to near – . . . . . . . . . . / . . . . . . . . . .; to drop – . . . . . . . . . .; significantly – . . . . . . . . . .; special – . . . . . . . . . .; with flaps up – . . . . . . . . . .; fluid – . . . . . . . . . .; exact – . . . . . . . . . .; engine thrust –

. . . . . . . . . .; to allow – . . . . . . . . . . / . . . . . . . . . .; thrust levers – . . . . . . . . . .; change – . . . . . . . . . .; to reject landing – . . . . . . . . . . / . . . . . . . . . .; within the limits – . . . . . . . . . .; effective – . . . . . . . . . .; to remain engaged – . . . . . . . . . .; to disconnect autothrottle – . . . . . . . . . .; to remain – . . . . . . . . .; to finish – . . . . . . . . .; incorrect – . . . . . . . . . / . . . . . . . . .; additional – . . . . . . . . . .; to initiate – . . . . . . . . .; to achieve – . . . . . . . . . . / . . . . . . . . . .; to deploy – . . . . . . . . . . / . . . . . . . . . .; to occur – . . . . . . . . . .; rapid – . . . . . . . . . . / . . . . . . . . . .; bank – . . . . . . . . . .; possibility – . . . . . . . . . .; to capture – . . . . . . . . . .; initiation – . . . . . . . . . /. . . . . . . . . /

. . . . . . . . . .; apparent – . . . . . . . . . / . . . . . . . . . .; to receive – . . . . . . . . . / . . . . . . . . . .; permit – . . . . . . . . . . / . . . . . . . . . .; existing speed – . . . . . . . . . . / . . . . . . . . . .; with one engine inoperative – . . . . . . . . . .; to elect – . . . . . . . . . . / . . . . . . . . . .; precise – . . . . . . . . . . / . . . . . . . . . .; constraints – . . . . . . . . . / . . . . . . . . . / . . . . . . . . . .; specified – . . . . . . . . .; to perform – . . . . . . . . . .; particularly – . . . . . . . . . .; to obtain – . . . . . . . . . / . . . . . . . . .; to anticipate – . . . . . . . . .; to turn on – . . . . . . . . .; to trim – . . . . . . . . . .; to cause sth – . . . . . . . . . . in sth; obstacle – . . . . . . . . . .; abrupt – . . . . . . . . . . / . . . . . . . . . .; to initiate – . . . . . . . . . . / . . . . . . . . . .; to feed –

. . . . . . . . . / . . . . . . . . .; before – . . . . . . . . . .; momentarily – . . . . . . . . . / . . . . . . . . . .; onset – . . . . . . . . . . / . . . . . . . . . .; to encounter – . . . . . . . . . . / . . . . . . . . . .; fuel burn –. . . . . . . . . .; amount – . . . . . . . . . .; intended route – . . . . . . . . . .; previous – . . . . . . . . . .; optimum – . . . . . . . . . .; flaps up speed – . . . . . . . . . ., reduction – . . . . . . . . . .; consequently – . . . . . . . . . .; to determine –. . . . . . . . . .; accurate – . . . . . . . . . . / . . . . . . . . . .; to be familiar with – to be . . . . . . . . . . of; hard restrictions – . . . . . . . . . .; to suit operator needs – . . . . . . . . . .; to make – . . . . . . . . . /

. . . . . . . . . / . . . . . . . . .; to store – . . . . . . . . .; current speed – . . . . . . . . . / . . . . . . . . .;

still air – . . . . . . . . . .; uncommanded – . . . . . . . . . / . . . . . . . . .; operative – . . . . . . . . . /

. . . . . . . . . .; nearly – . . . . . . . . . .; complete – . . . . . . . . . . / . . . . . . . . . .; to accomplish – . . . . . . . . . . / . . . . . . . . . .; to abandon – . . . . . . . . . . / . . . . . . . . . .; out of service – . . . . . . . . . . / . . . . . . . . . . / . . . . . . . . . ..

4. Think of antonyms.

Uphill slope – . . . . . . . . . .; failure – . . . . . . . . . .; outside – . . . . . . . . . .; prior to – . . . . . . . . . .; beyond – . . . . . . . . . .; idle power – . . . . . . . . . .; soft asphalt – . . . . . . . . . .; twin – . . . . . . . . . .; cooling – . . . . . . . . . .; dry surface – . . . . . . . . . .; engine shutdown – . . . . . . . . . .; improper – . . . . . . . . . .; steep approach – . . . . . . . . . . / . . . . . . . . . .; rate of descent – . . . . . . . . . .; arrival procedure – . . . . . . . . . .; partial – . . . . . . . . . . / . . . . . . . . . . / . . . . . . . . . .; descent path – . . . . . . . . . .; to maintain speed – . . . . . . . . . . / . . . . . . . . . . / . . . . . . . . . . /

. . . . . . . . . .; deceleration – . . . . . . . . . .; below – . . . . . . . . . .; approximately –

. . . . . . . . . . / . . . . . . . . . .; outbound – . . . . . . . . . .; top of descent – . . . . . . . . . .; to lower LG – . . . . . . . . .; to increase – . . . . . . . . . / . . . . . . . . . .; to extend speedbrakes – . . . . . . . . . . / . . . . . . . . . .; to obtain clearance – . . . . . . . . . ..

5. Make sure you know these abbreviations.

PMC – power . . . . . . . . . . control; CDU – . . . . . . . . . . and . . . . . . . . . . unit; MCP – mode . . . . . . . . . . panel; PF – . . . . . . . . . . flying; PM – pilot . . . . . . . . . .; TO – . . . . . . . . . .; GA – . . . . . . . . . around; CLM – . . . . . . . . . . ; F/D – . . . . . . . . . .

director; AGL – above . . . . . . . . . . level; V1 – . . . . . . . . . . speed; CG – . . . . . . . . . . of

. . . . . . . . . .; MEL – . . . . . . . . . . equipment . . . . . . . . . .; DDG – dispatch . . . . . . . . . .

guide; VR – . . . . . . . . . . speed; QRH – . . . . . . . . . . reference . . . . . . . . . . ; THR HLD – throttle . . . . . . . . . .; FMC – flight . . . . . . . . . . . . . . . . . . . .; RTO – rejected . . . . . . . . . .; ILS – . . . . . . . . . . . . . . . . . . . . system; FCOM – . . . . . . . . . .

crew . . . . . . . . . . manual; TAKEOFF REF page – . . . . . . . . . .; HDG – . . . . . . . . . .; HDG SEL – . . . . . . . . . .; NAV AID – . . . . . . . . . . . . . . . . . . .; WPT – . . . . . . . . . .

LNAV – . . . . . . . . . . . . . . . . . . . .; ASAP – as . . . . . . . . . . as . . . . . . . . . .; EFIS –

electronic flight . . . . . . . . . . . . . . . . . . . .; AFE – above . . . . . . . . . . elevation; FADEC – full authority . . . . . . . . . . . . . . . . . . . . control; ND – . . . . . . . . . .

display / database; TCAS – . . . . . . . . . . alert and . . . . . . . . . . avoidance . . . . . . . . . .; V/S – . . . . . . . . . . speed; FMA – . . . . . . . . . . mode . . . . . . . . . .; MMO – maximum

. . . . . . . . . . . . . . . . . . speed; FCU – fuel . . . . . . . . . . unit; F-PLN – . . . . . . . . . .; EXPED – . . . . . . . . . .; ISA – international . . . . . . . . . . atmosphere; FD – . . . . . . . . .

. . . . . . . .; AP – . . . . . . . . . .; OPT ALT – . . . . . . . . . . . . . . . . . .; CRZ – . . . . . . . . . .; CRS – . . . . . . . . . .; PERF page – . . . . . . . . . .; PROG – . . . . . . . . . .; LRC – long . . . . . . . . . . . . . . . . . . . .; RTA – required . . . . . . . . . . of . . . . . . . . . .; A/T –

. . . . . . . . . .; MOD ENG OUT CRZ – . . . . . . . . . . . . . . . . . . . .; ECON – . . . . . . . . . .; T/C – . . . . . . . . . . of . . . . . . . . . . point; VNAV – vertical . . . . . . . . . .; ECON CRZ – . . . . . . . . . . . . . . . . . . . .; CAS – . . . . . . . . . . air . . . . . . . . . .; CRZ page –

. . . . . . . . . .; LVL CHG – . . . . . . . . . . . . . . . . . . . .; PI – . . . . . . . . . . in-flight; ENG OUT – . . . . . . . . . .; T/D – top . . . . . . . . . . . . . . . . . . . . point; IRS – inertial

. . . . . . . . . . . . . . . . . . . .; EICAS – engine . . . . . . . . . . and crew . . . . . . . . . . system; EPR – . . . . . . . . . . pressure . . . . . . . . . .; AFDS – . . . . . . . . . . flight . . . . . . . . . .

system; GPWS – ground . . . . . . . . . . warning system, ECAM – electronic . . . . . . . . .

aircraft monitoring.

6. Insert prepositions.

1. The fuel system supplies fuel . . . . . the engines and the APU. 2. Fuel is contained . . . . . three tanks located within the wings and wing center section. 3. Both engines are normally pressure fed . . . . . the center tank until the center tank quantity decreases . . . . . near zero. 4. Check valves are located . . . . . the fuel system to ensure the proper direction . . . . . fuel flow and to prevent transfer of fuel

. . . . . tanks. 5. Nitrogen-enriched air (NEA) is delivered . . . . . the center fuel tank to reduce flammability . . . . . the tank. 6. Each fuel tank uses two AC powered fuel pumps which are cooled and lubricated . . . . . fuel passing . . . . . the pump. 7. This ensures that center tank fuel is used . . . . . main tank fuel, even though all fuel