AC-SYS MC

A minor aircraft system failure

A major aircraft system failure

The wing chordwise pressure distribution defines

In load analysis, the system of reference for the equilibrium of loads is

The ultimate stress:

Gust loads can be reduced by design if

The diameter of an oleo shock absorber depends on:

A constant speed propeller operates at the minimum pitch angle

In a tension test to measure elasticity and strength of a material, the yield stress is

Gust loads can be reduced by design if

The shock absorbing efficiency of a spring type landing gear is typically

In which conditions does a constant speed propeller have the max. efficiency?

Across the stator of an axial compressor stage

In a turbofan, the total pressure at the fan outlet is approximately

In a combustion chamber, the total pressure

Across a turbine stage (stator and rotor)

The exhaust nozzle of a civil turbofan engine is

Across the rotor of an axial compressor stage

In a civil turbofan engine, the fan thrust is approximately

In the impeller of a centrifugal compressor,

In a two-spool turbofan engine, the fan is usually driven

Across the rotor of a turbine

The CS-23 airworthiness regulations apply to

On some type of ejection seat the explosive cartridges must be replaced every two years. This maintenance concept is known as

The interaction of inertia and aerodynamic forces is responsible for

The CS-25 airworthiness regulations apply to

Honeywell recommends inspecting its 36-100 APUs (Auxiliary Power Units) at regular intervals. If the APU does not meet the inspection requirements, corrective actions are taken. If it passes the inspection, the unit is approved for flight until the next inspection. This maintenance concept is known as

The interaction of inertia and elastic forces is responsible for

In a static test, the aircraft structure must withstand the limit load

When flying with a positive load factor, the wing spars are subjected to

When flying with a negative load factor, the wing spars are subjected to

A static test is successful if the aircraft structure withstands

The new Boeing 787 Dreamliner has just been certified in the USA according to

According to the practical safety objectives defined by the FAA, minor failure conditions

The Failure Hazard Analysis (FHA) identifies

Many aircraft operators adhere to SOAP (Spectrographic Oil Analysis Program). In this program, oil samples taken from engines installed on aircraft in serviced are periodically analysed to detect traces of iron and other metals. This gives the operators an early warning of abnormal wear which could be due, for example, to a failing bearing, or to external factors such as operating in a dusty environment. This maintenance concept is known as

The noise emission limitations for aircraft certified in Europe are contained in

According to the practical safety objectives defined by the FAA, hazardous failure conditions

Assuming no common cause failure, the combined failure rate of two independent systems is

Aircraft brakes are fitted with brake wear indicator pins. These are checked regularly during aircraft operation to compare brake wear against a specified limit. This maintenance concept is known as