Boeing Aircraft Systems Comparison Quiz

Questions and Answers

What unique limitations does the B787 have compared to the B767?

Different wind limits for takeoff and landing (correct)

Shorter minimum runway length requirement

Increased maximum takeoff weight

Higher turbulence penetration speed

What is the maximum crosswind limit for the B787?

30 knots

40 knots

65 knots

50 knots (correct)

Which electrical system component is affected if the PECS fails?

Environmental control systems (correct)

Flight control systems

Primary flight displays

Landing gear systems

What is the wing anti-ice power source on the B787?

Electrical heating elements Signup and view all the answers

What is the limitation for altimeter differences in the B787?

No more than 200 feet Signup and view all the answers

How many packs are installed in the B787 air conditioning system?

2 Signup and view all the answers

What should be considered regarding taxiing on a 45-meter runway?

Plan for a two-point turn Signup and view all the answers

How many outflow valves are there in the B787 pressurization system?

2 Signup and view all the answers

What is a key difference in the FBW systems between Airbus and Boeing aircraft?

Boeing utilizes a yoke while Airbus uses a sidestick controller Signup and view all the answers

What function activates the autothrottle in stall protection systems of the B787?

Pitch envelope protection Signup and view all the answers

What is the primary backup power source for electrical brakes in the B787?

Battery power Signup and view all the answers

Which of the following describes the timing of the EICAS 'SPEEDBRAKE' warning?

Engages when critical airspeed thresholds are crossed Signup and view all the answers

When does the RTO (rejected takeoff) auto brake function become operational?

During the takeoff roll when activated Signup and view all the answers

What type of EICAS message indicates a non-time critical alert?

EICAS Amber alerts Signup and view all the answers

Which of the following systems in the B787 alerts the crew about windshear conditions?

Windshear detection system Signup and view all the answers

What must be done if the OAT is -7°C and time on the ground exceeds 60 minutes?

Perform specific pre-flight checks to ensure systems are operational. Signup and view all the answers

What effect does a low speed condition have on auto throttle functionality?

Auto throttle may disengage, resulting in manual control. Signup and view all the answers

Which situation could prevent auto throttle from activating?

Operating in a slip condition with high drag. Signup and view all the answers

At what altitude can the autopilot be used during a visual approach?

Up to 1500 feet. Signup and view all the answers

How do the bank angle limiting parameters differ between HDG mode and LNAV?

LNAV enforces more stringent angle limits compared to HDG mode. Signup and view all the answers

What is the primary caution when conducting an ILS DA landing?

Ensuring proper visibility conditions at the airport. Signup and view all the answers

What happens when continuing to use IAN below Decision Altitude (DA)?

Flight parameters may become unstable. Signup and view all the answers

What limitation exists for autopilot usage during landing sequences?

Autopilot cannot be used below 500 feet. Signup and view all the answers

What system improvements have been made regarding auto throttle functionality?

Redundant systems to ensure consistent operation. Signup and view all the answers

What is the impact of altitude on the auto throttle system (ATS)?

Low speeds at high altitudes may lead to throttle disengagement. Signup and view all the answers

What is a significant threat when using electric engines over pneumatic systems?

Potential electrical failures Signup and view all the answers

Which statement accurately describes a change made after the battery accident?

Modification of battery management protocols Signup and view all the answers

What type of generator is typically installed in the electrical system of aircraft like the B787?

Alternating current generator Signup and view all the answers

What function does the autostart provide during engine initialization?

Automatically manage fuel flow Signup and view all the answers

If the main battery fails while in the air, which other system is likely to be affected?

Flight control systems Signup and view all the answers

How long can the battery sustain operations without an external power source?

30 minutes Signup and view all the answers

What is the main purpose of the large motor power supply in electrical systems?

Supply power to flight control mechanisms Signup and view all the answers

What are the characteristics of the B787 engine that make it distinct?

Increased thrust-to-weight ratio Signup and view all the answers

Which of the following is a merit of fly-by-wire systems in aircraft?

Reduced weight and maintenance costs Signup and view all the answers

What scenario would prevent a second start attempt of the B787 engine?

Failure codes indicate a malfunction Signup and view all the answers

What does the flight path vector (FPV) indicate in aircraft instrumentation?

The intended trajectory of the aircraft Signup and view all the answers

What must be achieved to view a cross-section in Flight Management Architecture (FMA)?

Switch to the correct navigation mode Signup and view all the answers

What is indicated by the 'NAV AIR DATA SYS' message on the EICAS?

A malfunction in the navigation system Signup and view all the answers

Which speed limitations should be followed if the Flight Management Computer (FMC) is inoperative?

Use manual speed settings within specific limits Signup and view all the answers

What is the difference between 'unreliable airspeed' and 'NAV airspeed data'?

Unreliable airspeed suggests a loss of data, whereas NAV airspeed data is derived from multiple sources Signup and view all the answers

What unique feature is characteristic of the hydraulics system in the Boeing 787?

It utilizes only electric pumps for all operations Signup and view all the answers

What fuel is prohibited for use in the aircraft?

Avgas 100LL Signup and view all the answers

When does the 'FUEL LOW' indicator typically appear?

When fuel level is less than 25% capacity Signup and view all the answers

During flight, when is the RAT (Ram Air Turbine) automatically deployed?

If both engine power sources fail Signup and view all the answers

What is a key function of the Mode S transponder?

Provides altitude reporting and identification Signup and view all the answers

Study Notes

Differences between B787 and B767

B787 utilizes advanced composite materials, enhancing fuel efficiency and reducing weight compared to B767.
Major aerodynamic improvements in B787 reduce drag, translating to better range and performance.
Electrical systems differ significantly: B787 has a fully integrated electrical system with more electrical components, while B767 relies more on hydraulic systems.
B787's Pax O2 system offers improved efficiency and passenger comfort compared to the B767.

Limitations of B787

Minimum required width for a 180-degree turn is dependent on aircraft dimensions and configuration.
Caution during taxiing regarding wingtip clearance and other aircraft in proximity is critical.
The B787 can operate on a 45m runway but requires careful management of weight and balance.
Turbulence penetration speed should be monitored; significant reduction may be advised during severe turbulence.

Airplane General

B787 dimensions differ from previous aircraft, with a larger wingspan contributing to aerodynamic efficiency.
Must carry specific documents onboard according to regulations, including maintenance and flight manuals.
Emergency equipment count in the cockpit is predefined and must be easily accessible.

Air Systems

PECS (Pneumatic Electrical Control System) manages pneumatic systems, while ICS (Integrated Control System) oversees various aircraft systems.
Bleed air systems affected by PECS failure can hinder performance and efficiency.
Recent air conditioning issues include temperature control failures in specific scenarios.

Anti-Ice and Rain

Wing anti-ice power source derives from engine bleed air, with protocols for OAT below -7°C.
After 60 minutes on the ground, specific checks and system configurations must be performed.

Automatic Flight

Autopilot limitations vary by flight phase, with specific disengagement altitudes below 1500ft.
Auto land capabilities are available, with careful management required during IAN approach.
Use of VNAV mode requires understanding of descent and approach profile changes.

Communications

Multiple PTT (Push-to-Talk) buttons are installed for effective communication, ensuring redundancy.
Threat assessments for TCP design focus on communication lapses during critical phases.

Electrical Systems

Transition of hydraulic systems to electrical systems has enhanced reliability but introduces specific threats.
The design incorporates changes post-battery incidents, enhancing safety protocols.
Main and APU batteries are crucial for system operations; failure indicators are vital for crew awareness.

Engines and APU

B787 engines utilize state-of-the-art technologies for efficiency and performance.
Manual engine starts are possible under specific circumstances; procedures for autostart failures are defined.

Fire Protection

Fire protection systems differ in configuration for in-flight and ground operations, enhancing safety protocols.

Flight Controls

Fly-by-wire technology streamlines control inputs and system responses.
HUD (Head-Up Display) offers critical flight path information and aids in situational awareness.

IRS limitations must be understood for accurate navigation.
Data sources for various flight instruments must be cross-referenced for ensuring operational integrity.

Fuel Management

Fuel usage limitations and prohibited types must be adhered to, including cross-feed operations.
Fuel imbalance procedures are critical for maintaining aircraft stability.

Hydraulics

The B787's hydraulic system is unique, featuring distinct operational modes for various components.
RAT (Ram Air Turbine) deployment procedures and functionality are vital in emergencies.

Landing Gear

The braking system operates automatically under certain conditions, with backup sources defined for emergencies.

Warning Systems

B787 features multiple protective systems, including stall protections and windshear alerts.
EICAS messages categorize warnings, with time-critical alerts requiring immediate action.

Maneuvers

Specific procedures for windshear escape maneuver must be memorized and practiced for emergency situations.

Procedures

Comprehensive pre-flight checks ensure readiness for departure, with deviation calls specified for approaches.
Involves specific protocols for engine failure and volcanic ash encounters during flight.

Performance

Performance characteristics define V1 speeds, with optimum V1 offering benefits but also associated threats.
Effective management of performance metrics is crucial for successful flight operations.

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Description

Test your knowledge on the differences between the Boeing 787 and 767 aircraft. This quiz covers various aspects including electrical systems, limitations, and the passenger oxygen system. Dive in and see how familiar you are with the unique features that distinguish these two models.