The Electronic Engine Control is using the engine data entry plug to establish the installed engine thrust configuration. Why is the N1 trim value included in this data rather than relying only on the nominal engine model rating?, The N1 trim compensates for measured thrust variation between individual engines so an engine producing more than the required test-cell thrust can be derated appropriately., The N1 trim changes the bypass ratio so the engine can be matched to the specific Boeing 737 MAX model., The N1 trim alters the High Pressure Compressor stage scheduling to compensate for turbine deterioration., A fault affects the low-pressure rotor system. Which bearing combination is directly responsible for supporting that rotor?, Number 2, number 3 and number 4 bearings., Number 1, number 2 and number 5 bearings., Number 3 and number 4 bearings only., A technician is analysing sensor inputs associated with the engine aerodynamic stations. Which station and parameter combination is correct?, Station 25 measures High Pressure Compressor outlet pressure., Station 48 measures Low Pressure Turbine inlet temperature using eight Exhaust Gas Temperature probes., Station 12 measures compressor discharge pressure., Why does the LEAP-1B fan major module contribute both thrust and structural functionality rather than serving only as a rotating aerodynamic assembly?, It produces approximately 80 percent of engine thrust while also providing attachment to the pylon, front-section structural rigidity, containment, nacelle attachment points and connection to the core engine., It produces only primary-core thrust but structurally supports the High Pressure Turbine and accessory gearbox., It carries the entire engine axial load through the fan disk into the aft engine mount., One fan blade must be removed. What sequencing requirement is necessary before the blade can be released from the fan disk?, Remove the fan blade lock first, then remove the front spinner and platform front shroud., Remove the front spinner and platform front shroud, position the blade at 6 o’clock, remove the spacer, remove the lock and adjacent platforms, then remove the blade., Remove the adjacent balance weights, then slide the blade radially out of the fan disk dovetail., A pneumatic-system fault requires identification of which High Pressure Compressor stages supply different bleed-air functions. Which allocation is correct?, Stage 4 supplies Environmental Control System and Low Pressure Turbine cooling air; stage 7 supplies nacelle/booster anti-ice and High Pressure Turbine cooling air; stage 10 supplies transient bleed and Environmental Control System air., Stage 4 supplies only High Pressure Turbine cooling, stage 7 supplies Environmental Control System air, and stage 10 supplies Low Pressure Turbine cooling., Stage 4 supplies transient bleed air, stage 7 supplies only customer bleed air, and stage 10 supplies anti-ice air., Why is the combustor diffuser nozzle structurally significant in addition to its aerodynamic role?, It supports only the fuel manifolds and has no major structural load path., It forms the structural load path between the rear High Pressure Compressor stator case and High Pressure Turbine stator case while also supporting the combustion chamber, fuel nozzles and igniters., It carries the Low Pressure Turbine shaft loads directly into the fan frame., Which cooling arrangement correctly describes the two-stage High Pressure Turbine rotor?, Both stages are cooled exclusively by fourth-stage High Pressure Compressor air., Stage 1 receives compressor discharge air through the Modulated Turbine Cooling system, while stage 2 receives seventh-stage High Pressure Compressor air through impeller tubes., Stage 1 is cooled by fan air and stage 2 by tenth-stage customer bleed air., At low engine speed, the sump eductor system is operating. What is the purpose of admitting seventh-stage High Pressure Compressor air through the sump injection nozzle?, It pressurises the B sump to prevent oil migration through the number 4 bearing seals., It increases airflow through the A sump by creating a lower pressure in the centre vent tube, improving seal effectiveness and reducing oil consumption., It cools the number 5 bearing by increasing airflow through the rear sump., During a borescope inspection of the High Pressure Compressor, where are the normal High Pressure Compressor inspection ports located?, Eleven ports, C through M, positioned generally between the 3 o’clock and 5 o’clock positions on the right side of the engine., Ten ports, D through M, positioned between the 9 o’clock and 11 o’clock positions on the left side., Eleven ports, C through M, distributed equally around both sides of the compressor case.

ATA 72

tarafından
Yazdır
Yerleştir

Skor Tablosu

Görsel stil

Seçenekler

Şablonu değiştir

Otomatik olarak kaydedilen geri yüklensin mi: ?